CN113552708A - Preparation method of disc type solar condenser - Google Patents

Abstract

The invention relates to a preparation method of a disc type solar condenser. The condenser consists of a primary reflector and a secondary reflector; a plurality of small lenses are arranged on the primary reflector, and incident light can be reflected to the secondary reflector; the secondary reflector is a plane mirror, a spherical convex mirror or a spherical concave mirror, and can reflect the incident light reflected by the primary reflector to the inside of the heat storage container again. The preparation method of the condenser comprises the following steps: firstly, three-dimensional design software such as SolidWorks is utilized to make a three-dimensional view of a condenser lens; then making the stereogram of the condenser into a real object; and finally, carrying out condensation test on the real object of the condenser lens by using a laser.

Description

Preparation method of disc type solar condenser

Technical Field

The invention relates to the technical field of solar condensation, in particular to a preparation method of a disc type solar condenser.

Background

At present, the disc type solar energy condenser is mainly applied to the disc type photo-thermal power generation technology. The basic principle of the disc type photo-thermal power generation technology is that sunlight is focused to be used as a heat source, and a Stirling engine is directly driven to do work to generate power. In order to ensure the thermal efficiency of the Stirling engine, the temperature of a heat source must reach thousands of degrees, which puts high requirements on the light condensation precision of the disc type solar condenser; in order to meet the high light condensation requirement, the existing dish type solar energy condenser adopts a paraboloidal reflector with high processing precision.

If the application scenario does not require such high spot focusing accuracy and heating temperature, but rather concentrates sunlight roughly into a specified area (e.g. utility model patent "distributed solar thermal storage", patent No. 2018102799515), then the existing dish solar concentrator is not economically feasible because it has two disadvantages: (1) the high-precision parabolic reflector has high manufacturing cost, and finally the cost of the whole system is difficult to reduce, which is one of the reasons that the dish type photo-thermal power generation technology cannot be used for large-scale commercial use later; (2) the Stirling engine is generally arranged at the focus of the parabolic reflector, and the moment of the Stirling engine relative to the supporting point of the sun tracking mechanism is large, so that the power and the energy consumption of the sun tracking mechanism are large, the manufacturing cost is increased, and the economic benefit is reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a method, which can design a dish type solar condenser with simple structure and low cost, and is suitable for application scenes which do not need high-precision point focusing and only need to approximately concentrate sunlight into a specified area.

The technical scheme of the invention is as follows:

a preparation method of a disc type solar condenser comprises the following steps:

the condenser consists of aprimary reflector 1 and asecondary reflector 2; a plurality ofsmall lenses 5 cut by plane mirrors are arranged on theprimary reflector 1, and theincident light 12 is reflected to thesecondary reflector 2; thesecondary reflector 2 is positioned above theprimary reflector 1 and is formed by cutting a whole reflector, and reflects the incident light 12 reflected by theprimary reflector 1 into theheat storage container 17 again;

theprimary reflector 1 is a hollow ring-shaped structure, and the edges of the ring-shaped structure are anouter ring 14 and aninner ring 15; asmall lens 5 is laid between theouter ring 14 and theinner ring 15; theheat storage container 17 is placed inside theinner ring 15;

the plane of theinner ring 15 is a primarymirror reference plane 16; the plane where the edge profile of thesecondary reflector 2 is located is a secondaryreflector reference surface 6; the secondarymirror reference surface 6 is parallel to the primarymirror reference surface 16;

connecting the circle center of theinner ring 15 with the circle center of the edge profile of thesecondary reflector 2 to obtain a straight line which is a central connectingline 8; the central connectingline 8 is vertical to the primarymirror reference plane 16;

the surface of the insulatingglass window 25 of theheat storage container 17 closest to thesecondary reflector 2 is selected as thelight collecting area 7, and if the incident light 12 can be reflected to thelight collecting area 7 by theprimary reflector 1 and thesecondary reflector 2, the light can enter the interior of theheat storage container 17 without fail;

the preparation method comprises the following steps:

(1) making a three-dimensional view of a condenser lens according with the design target according to the actual application scene and the requirements of customers;

(2) optical simulation software is selected to perform optical simulation on the three-dimensional image of the condenser lens, and whether the light paths of the primary reflection light and the secondary reflection light meet the design requirements or not is verified;

(3) preparing a condenser according to the stereogram of the condenser;

(4) carrying out condensation test on the condenser by using the laser, and returning to the step (1) to modify the stereogram of the condenser if the light beam emitted by the laser is not reflected to thelight collection area 7; ensuring that theincident light 12 is reflected by theprimary reflector 1 and thesecondary reflector 2 to enter thelight collecting region 7 and not blocked by the shell of theheat storage container 17;

the step (1) comprises the following steps:

(1-1) making a sectional view of themirror 1 on an XY plane;

(1-2) rotating the cross-sectional view of theprimary reflecting mirror 1 by one revolution with the central connectingline 8 as an axis to generate a perspective view of theprimary reflecting mirror 1;

(1-3) making an installation position of thesmall lens 5 on the perspective view of theprimary reflector 1;

(1-4) making a perspective view of thesecondary reflector 2; the perspective view of thesecondary reflector 1 and the perspective view of theprimary reflector 1 together form a perspective view of the condenser;

the step (1-1) comprises the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: radius F of theprimary mirror 1;

r: when thesecondary reflector 2 is a spherical mirror, the spherical radius of thesecondary reflector 2 is larger;

h: the distance between the primarymirror reference surface 16 and the secondarymirror reference surface 6;

h: the distance between thelight collection area 7 and the primarymirror reference plane 16;

d: radius of the edge profile of thesecondary mirror 2;

d: the radius of the edge profile of thelight collecting area 7;

step 2, drawing across-sectional outline 34 of the outer shell of thethermal storage container 17 on an XY plane;

step 3, drawing a line segment L on the XY plane diagram_d33 denotes a light-collectingregion 7; line segment L_dThe function of 33 is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line segment L on the XY plane diagram_D35 represents the projection of the profile of thesecondary mirror 2 in the X-axis direction; line segment L_DThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passingline section L_D35 as a function S of the profile of the quadratic mirror_D；

If the secondary mirror is a plane mirror, thecurve function S_D51 is as follows: h, x ∈ (0, 2D);

if the quadratic mirror is a spherical convex mirror, thecurve function S_D52 is:

if the secondary reflector is a spherical concave mirror, thecurve function S_D53 is:

step6, passingline section L_d33 and line segment L_DThe midpoint of 35 is taken as acentral connecting line 8; the function of thecenter connecting line 8 is: x is D;

step7, selecting point (x)₁,y₁)37, the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁)37 as a slope k₁Length of l₁Line segment L of₁36, the line segment representing the cross section of thesmall lens 5; line segment L₁The function of 36 is: k is₁(x-x₁)+y₁,x∈(x₁,x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁Starting point of 36 (x)₁,y₁)37 asincident light P₀38; incident light ray P₀The function of 38 is: x ═ x₁；

Step9, passingline section L₁36 asincident ray T₀39; incident ray T₀The function of 39 is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10,segment L₁36 is regarded as a section of a plane reflector, and the incident ray P is calculated according to the law ofoptical reflection₀38 of primary reflectedlight ray P₁40; primary reflected light ray P₁The slope of 40 is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞,x₁)；

Step 11,segment L₁36 is regarded as the section of a plane reflector, and the incident ray T is calculated according to the law ofoptical reflection₀39 primary reflectedray T₁41; primary reflected light ray T₁The slope of 41 is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞,x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflectedlight P₁40 and the section curve S_DCross point (x) of₂,y₂)42；

Step 13, calculating the primary reflectedray T₁41 and the cross-sectional curve S_DCross point (x) of₃,y₃)43；

Step 14, passing Point (x)₂,y₂)42 make a primary reflectedlight ray P₁40 in the cross-sectional curve S_DUpper secondary reflectedlight ray P₂44；

If the secondary reflector is a flat mirror, the secondary reflected light ray P₂The slope of 44 is: k is a radical of_P1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₂)+y₂,x∈(-∞,x₂)；

If the secondary reflector is a spherical convex mirror, the secondary reflected light P₂The slope of 44 is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

If the secondary reflector is a spherical concave mirror, the secondary reflected light ray P₂The slope of 44 is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

Step15, passing Point (x)₃,y₃)43 make a primary reflectedray T₁41 in the cross-sectional curve S_DUpper secondary reflectedray T₂45；

If the secondary reflector is a plane mirror, the secondary reflected light ray T₂The slope of 45 is: k is a radical of_T1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₃)+y₃,x∈(-∞,x₃)；

If the secondary reflector is a spherical convex mirror, the secondary reflected light ray T₂The slope of 45 is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

If the secondary reflector is a spherical concave mirror, the secondary reflected light ray T₂The slope of 45 is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

Step16, calculating the secondary reflectedlight P₂44 andline segment L_d33, the intersection point; if the light ray P is reflected twice₂44 andline segment L_d33 intersect at the right place and not with theedge contour line 34 of the outer shell of thethermal storage container 17, the next Step17 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflectedlight ray P₂44 andline segment L_d33 intersect at suitable locations and do not intersect with theedge contour lines 34 of the housing of thethermal storage container 17;

step17, calculating the secondary reflectedray T₂45 andline segment L_d33, the intersection point; if the light ray T is reflected twice₂45 andline segment L_d33 intersect at the right place and not with theedge contour line 34 of the outer shell of thethermal storage container 17, the next Step18 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflectedlight ray T₂45 andline segment L_d33 intersect at suitable locations and do not intersect with theedge contour lines 34 of the housing of thethermal storage container 17;

step18, selectingline segment L₁36 as a starting point and making a slope of k₂Length of l₂Line segment L of₂46; repeating the steps from Step7 to Step17 until the incident ray is divided by theline segment L₂46 and the profile curve S of the secondary mirror_DThe secondary reflected light obtained by reflection is all related to theline segment L_d33 at the appropriate location;

step19, repeating the steps from Step7 to Step18 until the maximum distance between thesection line segment 47 of theprimary reflector 1 and thecenter connecting line 8 is equal to the radius F of theprimary reflector 1;

step 20, adjusting the slope k of all thesectional line segments 47 of theprimary mirror 1₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with theline segment L_d33 intersect at a suitable location.

Preferably, the step (4) comprises the steps of:

(3-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incidentlight ray P₀38 and strikes thesmall lens 5 of theprimary mirror 1;

(3-2) if the light beam emitted by the laser falls on the line segment L after being reflected by theprimary reflector 1 and thesecondary reflector 2_d33, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incidentlight ray P₀38 and hit on the othersmall lens 5 of theprimary mirror 1 and repeat the above test steps; otherwise, returning to the step (1) and modifying the perspective view of the collecting lens until all thesmall lenses 5 can reflect the light beams emitted by the laser into thelight collecting area 7.

The invention has the beneficial effects that:

the present invention can be applied to a distributed solar thermal storage apparatus (distributed solar thermal storage apparatus, patent No. 2018102799515) as shown in fig. 3, and functions to collect sunlight into thethermal storage container 17 and heat the thermal storage medium in thethermal storage container 17 to 200 degrees centigrade or higher;

as shown in the attacheddrawings 1 and 2, the disc type solar condenser consists of aprimary reflector 1 and asecondary reflector 2; a plurality ofsmall lenses 5 cut by plane mirrors are arranged on theprimary reflector 1 and can reflect incident light 12 to thesecondary reflector 2; thesecondary reflector 2 is formed by cutting a single reflector, and can reflect the incident light reflected by theprimary reflector 1 into theheat storage container 17 again.

The design concept of the disc type solar condenser is as follows:

(1) the characteristic that the application scene has low requirement on the condensation precision is fully utilized, theprimary reflector 1 is manufactured by splicing small plane mirrors, and a parabolic reflector which can be manufactured only by a mechanical die and a grinding process is replaced;

(2) thesmall lens holder 4 of theprimary reflector 1 is preferably made of plastic;

(3) thesecondary reflector 2 is used for transferring thelight collecting area 7 from the focal position of theprimary reflector 1 to the vicinity of the central position of theprimary reflector 1, so that the moment of the whole condenser relative to the pitching rotating shaft is reduced;

(4) thesecondary reflector 2 is preferably made of a plane mirror among the plane mirror, the spherical convex mirror and the spherical concave mirror.

Thanks to the design concept, the cost of the whole condenser is reduced to be within 200 yuan, which is far lower than that of the traditional parabolic reflector, and the economic benefit is very obvious.

However, the light collection requirements of the dish solar concentrator vary greatly from conventional parabolic concentrators. The conventional parabolic condenser has the following condensing requirements: point focusing, "higher concentration ratio" is better; however, the light-gathering requirements of the dish-type solar light-gathering lens mainly include the following points:

(1) the surface focusing is performed as long as the sunlight is gathered in a specified range, and no requirement is made on the light gathering ratio;

(2) the housing of theheat storage container 17 cannot be made to block sunlight;

(3) in order to reduce the reflection loss of the sunlight on the surface of the glass, the sunlight is close to the vertical incidence as much as possible;

(4) the projection size of thesecondary reflector 2 is minimized on the premise that all incident light rays are guaranteed to be concentrated to thelight collecting area 7.

Since the light-gathering requirement changes, when designing thesection line 47 of theprimary reflector 1, the optimal light-gathering effect cannot be obtained by adopting the method of dividing the line on the parabola, and the novel method introduced by the invention must be adopted.

The idea of the invention is as follows: firstly, making a section of theprimary reflector 1 on an XY plane, and replacing the section of thesmall lens 5 with asection line 47; adjusting the slope and the length of each line segment of thesection line segment 47 respectively until all the light paths meet the light-gathering requirement; rotating the profile of theprimary reflector 1 for one circle by taking a central connectingline 8 of theprimary reflector 1 and thesecondary reflector 2 as an axis to generate a three-dimensional view of theprimary reflector 1; then, making the installation position of thesmall lens 5 on the perspective view of theprimary reflector 1; then, performing optical simulation on the whole condenser lens by using optical simulation software LightTools to verify whether all light paths meet the design requirements; and finally, making the stereogram into a real object, and carrying out light condensation test on the real object by using a laser.

Drawings

Fig. 1 is an external view of a dish-type solar condenser. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 3-a primary mirror assembly; 4-a small lens support; 5-small lens; 13-a support bar; 14-an outer ring; 15-inner ring.

Fig. 2 is a cross-sectional view of a dish solar concentrator. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 6-secondary mirror reference plane; 7-a light collecting area; 8-center line; 9-a light collection plane; 11-section line segment; 12-incident light; 13-a support bar; 14-an outer ring; 15-inner ring; 16-primary mirror reference plane.

Fig. 3 is a complete machine diagram of the distributed solar heat storage device. The labels in the figure are: 1-a primary reflector; 2-a secondary reflector; 7-a light collecting area; 10-light collecting circle; 13-secondary mirror support bar; 17-a thermal storage vessel; 18-a thermal storage container support arm; 19-pitch pan tilt; 20-a pitch rotation motor; 21-tripod head supporting feet; 22-a roller assembly; 23-horizontal rotation track; 24-horizontal rotation motor.

Fig. 4 is a sectional view of the thermal storage container. The labels in the figure are: 25-insulating glass windows; 26-a light-heat converter; 27-a thermal storage container tank; 28-a housing; 29-a bearing; 30-a rotary joint; 31-an oil bin; 32-heat insulating material.

Fig. 5 is a drawing of an embodiment of the present invention. The labels in the figure are: 8-center line L_m(ii) a 33-line segment L_d(ii) a 34-section of shell of heat accumulation container; 35-line segment L_D(ii) a 36-line segment L₁(ii) a 37-line segment L₁Starting point (x) of (c)₁,y₁) (ii) a 38-incident ray P₀(ii) a 39-incident ray T₀(ii) a 40-primary reflected light ray P₁(ii) a 41-aSub-reflected ray T₁(ii) a 42-intersection (x)₂,y₂) (ii) a 43-intersection (x)₃,y₃) (ii) a 44-secondary reflected light ray P₂(ii) a 45-secondary reflected ray T₂(ii) a 46-line segment L₂(ii) a 47-section line segment; 51-section curve S_D。

Fig. 6 is a second embodiment of the present invention. The labels in the figure are: 8-center line L_m(ii) a 33-line segment L_d(ii) a 34-section of shell of heat accumulation container; 35-line segment L_D(ii) a 36-line segment L₁(ii) a 37-line segment L₁Starting point (x) of (c)₁,y₁) (ii) a 38-incident ray P₀(ii) a 39-incident ray T₀(ii) a 40-primary reflected light ray P₁(ii) a 41-primary reflected ray T₁(ii) a 42-intersection (x)₂,y₂) (ii) a 43-intersection (x)₃,y₃) (ii) a 44-secondary reflected light ray P₂(ii) a 45-secondary reflected ray T₂(ii) a 46-line segment L₂(ii) a 47-section line segment; 48-the sphere center of the secondary reflector; 49-normal m₁(ii) a 50-normal m₂(ii) a 52-section curve S_D；

Fig. 7 is a third embodiment of the present invention. The labels in the figure are: 8-center line L_m(ii) a 33-line segment L_d(ii) a 34-section of shell of heat accumulation container; 35-line segment L_D(ii) a 36-line segment L₁(ii) a 37-line segment L₁Starting point (x) of (c)₁,y₁) (ii) a 38-incident ray P₀(ii) a 39-incident ray T₀(ii) a 40-primary reflected light ray P₁(ii) a 41-primary reflected ray T₁(ii) a 42-intersection (x)₂,y₂) (ii) a 43-intersection (x)₃,y₃) (ii) a 44-secondary reflected light ray P₂(ii) a 45-secondary reflected ray T₂(ii) a 46-line segment L₂(ii) a 47-section line segment; 48-the sphere center of the secondary reflector; 49-normal m₁(ii) a 50-normal m₂(ii) a 53-section curve S_D。

Fig. 8 is a three-dimensional view one of the primary mirrors. The labels in the figure are: 8-center line L_m。

Fig. 9 is a three-dimensional view two of the primary mirror. The labels in the figure are: 5-small lens.

Detailed Description

The present invention will be described in detail below with reference to the accompanying fig. 1 to 9.

The specific application example of the disc-type solar condenser prepared according to the invention is a brand-new product: distributed solar thermal storage apparatus (patent name: distributed solar thermal storage apparatus, patent No. 2018204520155), as shown in fig. 1-4:

as shown in fig. 3, the distributed solar heat storage device mainly comprises a disc-type solar condenser, aheat storage container 17, a heat storagecontainer support arm 18, apitching rotation pan-tilt 19, apitching rotation motor 20,pan-tilt support feet 21, a roller assembly 22, ahorizontal rotation track 23 and ahorizontal rotation motor 24;

as shown in the attached figure 1, the disc type solar condenser consists of aprimary reflector 1, asecondary reflector 2 and a secondaryreflector support rod 13; theprimary reflector 1 is formed by connecting 6primary reflector assemblies 3 to form a sunny surface facing incident rays; theprimary reflector assembly 3 comprises asmall lens 5 and asmall lens support 4, and is formed by connecting a plurality ofsmall lenses 5 and onesmall lens support 4; thesmall lens 5 is cut by a plane mirror and is arranged on the sunny side of thesmall lens support 4 to form a reflecting surface of theprimary reflector 1, and the incident light 12 can be reflected to thesecondary reflector 2; the reflecting surface of thesecondary reflector 2 is opposite to the reflecting surface of theprimary reflector 1, and the incident light 12 reflected by theprimary reflector 1 can be reflected into thelight collecting area 7;

thelight collecting region 7 refers to the surface of theheat storage container 17 on the insulatingglass window 25 closest to thesecondary reflector 2, and if the incident light 12 can be reflected by theprimary reflector 1 and thesecondary reflector 2 to thelight collecting region 7, it can enter the interior of theheat storage container 17 without fail;

as shown in fig. 3, theprimary mirror 1 is fixed to theheat storage container 17 by a coupling, and thesecondary mirror 2 is connected to theheat storage container 17 by asecondary mirror support 13;

as shown in fig. 4, theheat storage container 17 is composed of a heat insulatingglass window 25, aphotothermal converter 26, a heatstorage container tank 27, ahousing 28, a rotary joint 30 and abearing 29; thephotothermal converter 26 is installed on the heatstorage container tank 27, the photothermal converter and the heat storage container tank form aclosed oil bin 31, and heat conduction oil is contained in theoil bin 31; the insulatingglass window 25 is mounted on thephotothermal converter 26, and the surface facing the incident light is thelight collecting region 7; the incident light 12 collected by the disc-type solar condenser is irradiated into thephotothermal converter 26 through the heat-insulatingglass window 25; a relatively large space is formed between the heatstorage container tank 27 and thecasing 28, and aheat insulating material 32 is installed in the space;

as shown in fig. 3, thethermal storage container 17 is connected to the thermal storagecontainer support arm 18 via abearing 29, and the thermal storagecontainer support arm 18 is fixed to the tilt/tilt head 19; the disc type solar energy collecting lens and theheat storage container 17 as a whole have the freedom degree of pitching rotation on thepitching rotation holder 19, and can realize pitching rotation under the action of thepitching rotation motor 20 and the speed reduction transmission mechanism;

the pitching rotatingcradle head 19 is connected to a roller assembly 22 through a supportingfoot 21, and the roller assembly 22 can horizontally rotate on a horizontalrotating track 23; thehorizontal rotation rail 23 is provided with an internal gear which is meshed with an external gear of thehorizontal rotation motor 24; the disc type solar energy condenser, theheat storage container 17, the heat storagecontainer supporting arm 18, thepitching rotation holder 19, the supportingfoot 21, the roller assembly 22 and other equipment as a whole have horizontal rotation freedom, and can be driven by thehorizontal rotation motor 24 to horizontally rotate on thehorizontal rotation track 23.

The work flow of the product is as follows:

a nine-axis acceleration gyroscope angle sensor is arranged on theheat storage container 17 and can measure the azimuth angle of the disc type solar condenser;

the singlechip control system calculates the azimuth angle of the sun according to the local longitude and latitude, date and time;

the single chip microcomputer control system drives thepitching rotating motor 20 and the horizontalrotating motor 24 according to the difference value between the azimuth angle of the disc type solar condenser and the azimuth angle of the sun, and the difference value is adjusted to be within an error allowable range;

the disc-type solar collecting lens collects sunlight into the photo-thermal converter 26 to heat the photo-thermal converter 26, and the photo-thermal converter 26 heats heat conduction oil in theoil bin 31;

the heat conducting oil in theoil 31 can realize long-time heat preservation and heat storage under the action of theheat preservation material 32;

under the action of the oil pump, the heat conducting oil in theoil bin 31 can be pumped out from the rotary joint 30, and then hot water, steam and the like are generated through the heat exchanger.

The disc-type solar condenser prepared according to the invention has three different structures according to the difference of thesecondary reflector 2, and the structure is divided into 3 embodiments to be explained below.

Example 1

Thesecondary reflector 2 of the present embodiment is a plane mirror, and the design method mainly comprises six steps: (1) as shown in fig. 5, SolidWorks is selected as a three-dimensional design tool, and a cross-sectional view of theprimary reflector 1 is made by using a sketch function of the SolidWorks; (2) as shown in fig. 8, the sectional view of theprimary reflecting mirror 1 is rotated by one turn with the central connectingline 8 of theprimary reflecting mirror 1 and the secondary reflectingmirror 2 as an axis to generate a perspective view of theprimary reflecting mirror 1; (3) as shown in fig. 9, the mounting position of thesmall mirror 5 is made on the perspective view of theprimary mirror 1; (4) selecting optical simulation software LightTools to perform optical simulation on the whole collecting lens including theprimary reflector 1 and thesecondary reflector 2, and verifying whether the light paths of the primary reflected light and the secondary reflected light meet the design requirements or not; (5) making the stereogram of the condenser into a real object; (6) and carrying out condensation test on the real object of the condenser by using a laser.

The step (1) comprises the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: radius F of theprimary mirror 1;

r: when thesecondary reflector 2 is a spherical mirror, the spherical radius of thesecondary reflector 2 is larger;

h: the distance between the primarymirror reference surface 16 and the secondarymirror reference surface 6;

h: the distance between thelight collection area 7 and the primarymirror reference plane 16;

d: radius of the edge profile of thesecondary mirror 2;

d: the radius of the edge profile of thelight collecting area 7;

step 2, drawing across-sectional outline 34 of the outer shell of theheat storage container 17 on a sketch of SolidWorks;

step 3, drawing a line L on the sketch ofSolidWorks_d33 denotes a light-collectingregion 7; line segment L_dThe function of 33 is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line L on the sketch ofSolidWorks_D35 represents the projection of the profile of thesecondary mirror 2 in the X-axis direction; line segment L_DThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passingline section L_D35 as a function S of the profile of thequadratic mirror_D51; function of thecurve S_D51 is as follows: h, x ∈ (0, 2D);

step6, passingline section L_d33 and line segment L_DThe midpoint of 35 is taken as a central connectingline 8; the function of thecenter connecting line 8 is: x is D;

step7, selecting point (x)₁,y₁)37, the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁)37 as a slope k₁Length of l₁Line segment L of₁36, the line segment representing the cross section of thesmall lens 5; line segment L₁The function of 36 is: k is₁(x-x₁)+y₁,x∈(x₁,x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁Starting point of 36 (x)₁,y₁)37 asincident light P₀38; incident light ray P₀The function of 38 is: x ═ x₁；

Step9, passingline section L₁36 asincident ray T₀39; incident ray T₀The function of 39 is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10,segment L₁36 is regarded as a section of a plane reflector, and the incident ray P is calculated according to the law ofoptical reflection₀38 of primary reflectedlight ray P₁40; primary reflected light ray P₁The slope of 40 is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞,x₁)；

Step 11,segment L₁36 is regarded as the section of a plane reflector, and the incident ray T is calculated according to the law ofoptical reflection₀39 primary reflectedray T₁41; primary reflected light ray T₁The slope of 41 is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞,x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflectedlight P₁40 and the section curve S_DCross point (x) of₂,y₂)42；

Step 13, calculating the primary reflectedray T₁41 and the cross-sectional curve S_DCross point (x) of₃,y₃)43；

Step 14, passing Point (x)₂,y₂)42 make a primary reflectedlight ray P₁40 in the cross-sectional curve S_DSecondary reflected light ray P on 51₂44; secondary reflected light P₂The slope of 44 is: k is a radical of_P1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₂)+y₂,x∈(-∞,x₂)；

Step15, passing Point (x)₃,y₃)43 make a primary reflectedray T₁41 in the cross-sectional curve S_DSecondary reflected ray T on 51₂45, a first step of; secondary reflected light ray T₂The slope of 45 is: k is a radical of_T1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₃)+y₃,x∈(-∞,x₃)；

Step16, calculating the secondary reflectedlight P₂44 andline segment L_d33, the intersection point; if the light ray P is reflected twice₂44 andline segment L_d33 intersect at the right place and not with theedge contour line 34 of the outer shell of thethermal storage container 17, the next Step17 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflectedlight ray P₂44 andline segment L_d33 intersect at suitable locations and do not intersect with theedge contour lines 34 of the housing of thethermal storage container 17;

step17, calculating the secondary reflectedray T₂45 andline segment L_d33, the intersection point; if the light ray T is reflected twice₂45 andline segment L_d33 intersect at the right place and not with theedge contour line 34 of the outer shell of thethermal storage container 17, the next Step18 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflectedlight ray T₂45 andline segment L_d33 intersect at suitable locations and do not intersect with theedge contour lines 34 of the housing of thethermal storage container 17;

step18, selectingline segment L₁36 as a starting point and making a slope of k₂Length of l₂Line segment L of₂46; repeating the steps from Step7 to Step17 until the incident ray is divided by theline segment L₂46 and the profile curve S of the secondary mirror_DThe secondary reflected light obtained by reflection is all related to theline segment L_d33 at the appropriate location;

step19, repeating the steps from Step7 to Step18 until the maximum distance between thesection line segment 47 of theprimary reflector 1 and thecenter connecting line 8 is equal to the radius F of theprimary reflector 1;

step 20, adjusting the slope k of all thesectional line segments 47 of theprimary mirror 1₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with theline segment L_d33 intersect at a suitable location.

The step (6) comprises the following steps:

(6-1) adjusting the angle and direction of the laser so thatThe light beam emitted by the laser is parallel to the incidentlight beam P₀36 and strikes on thesmall lens 5 of theprimary mirror 1;

(6-2) if the light beam emitted by the laser falls on the line segment L after being reflected by theprimary reflector 1 and thesecondary reflector 2_d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incidentlight ray P₀36 and hit on anothersmall lens 5 of theprimary reflector 1 and repeat the above test steps; if not, theline segment L_d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.

Example 2

Thesecondary reflector 2 of the present embodiment is a spherical convex mirror, and the design method mainly comprises six steps: (1) as shown in fig. 6, SolidWorks is selected as a three-dimensional design tool, and a cross-sectional view of theprimary reflector 1 is made by using a sketch function of the SolidWorks; (2) as shown in fig. 8, the sectional view of theprimary reflecting mirror 1 is rotated by one turn with the central connectingline 8 of theprimary reflecting mirror 1 and the secondary reflectingmirror 2 as an axis to generate a perspective view of theprimary reflecting mirror 1; (3) as shown in fig. 9, the mounting position of thesmall mirror 5 is made on the perspective view of theprimary mirror 1; (4) selecting optical simulation software LightTools to perform optical simulation on the whole collecting lens including theprimary reflector 1 and thesecondary reflector 2, and verifying whether the light paths of the primary reflected light and the secondary reflected light meet the design requirements or not; (5) making the stereogram of the condenser into a real object; (6) and carrying out condensation test on the real object of the condenser by using a laser.

The step (1) comprises the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: radius F of theprimary mirror 1;

r: when thesecondary reflector 2 is a spherical mirror, the spherical radius of thesecondary reflector 2 is larger;

h: the distance between the primarymirror reference surface 16 and the secondarymirror reference surface 6;

h: the distance between thelight collection area 7 and the primarymirror reference plane 16;

d: radius of the edge profile of thesecondary mirror 2;

d: the radius of the edge profile of thelight collecting area 7;

step 2, drawing across-sectional outline 34 of the outer shell of theheat storage container 17 on a sketch of SolidWorks;

step 3, drawing a line L on the sketch ofSolidWorks_d33 denotes a light-collectingregion 7; line segment L_dThe function of 33 is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line L on the sketch ofSolidWorks_D35 represents the projection of the profile of thesecondary mirror 2 in the X-axis direction; line segment L_DThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passingline section L_D35 as a function S of the profile of thequadratic mirror_D52; function of thecurve S_D52 is:

step6, passingline section L_d33 and line segment L_DThe midpoint of 35 is taken as a central connectingline 8; the function of thecenter connecting line 8 is: x is D;

step7, selecting point (x)₁,y₁)37, the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁)37 as a slope k₁Length of l₁Line segment L of₁36, the line segment representing the cross section of thesmall lens 5; line segment L₁The function of 36 is: k is₁(x-x₁)+y₁,x∈(x₁,x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁Starting point of 36 (x)₁,y₁)37 asincident light P₀38; incident light ray P₀The function of 38 is: x ═ x₁；

Step9, passingline section L₁36 asincident ray T₀39;incident ray T₀39 ofThe number is as follows: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10,segment L₁36 is regarded as a section of a plane reflector, and the incident ray P is calculated according to the law ofoptical reflection₀38 of primary reflectedlight ray P₁40; primary reflected light ray P₁The slope of 40 is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞,x₁)；

Step 11,segment L₁36 is regarded as the section of a plane reflector, and the incident ray T is calculated according to the law ofoptical reflection₀39 primary reflectedray T₁41; primary reflected light ray T₁The slope of 41 is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞,x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflectedlight P₁40 and the section curve S_DCross point (x) of₂,y₂)42；

Step 13, calculating the primary reflectedray T₁41 and the cross-sectional curve S_DCross point (x) of₃,y₃)43；

Step 14, passing Point (x)₂,y₂)42 make a primary reflectedlight ray P₁40 in the cross-sectional curve S_DSecondary reflected light ray P at 52₂44; secondary reflected light P₂(44) The slope of (d) is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

Step15, passing Point (x)₃,y₃)43 make a primary reflectedray T₁41 in the cross-sectional curve S_DUpper secondary reflectedray T₂45, a first step of; secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

Step16, calculating the secondary reflectedlight P₂44 andline segment L_d33, the intersection point; if the light ray P is reflected twice₂44 andline segment L_d33 intersect at the right place and not with theedge contour line 34 of the outer shell of thethermal storage container 17, the next Step17 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflectedlight ray P₂44 andline segment L_d33 intersect at suitable locations and do not intersect with theedge contour lines 34 of the housing of thethermal storage container 17;

step17, calculating the secondary reflectedray T₂45 andline segment L_d33, the intersection point; if the light ray T is reflected twice₂45 andline segment L_d33 intersect at the right place and not with theedge contour line 34 of the outer shell of thethermal storage container 17, the next Step18 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflectedlight ray T₂45 andline segment L_d33 intersect at suitable locations and do not intersect with theedge contour lines 34 of the housing of thethermal storage container 17;

step18, selectingline segment L₁36 as a starting point and making a slope of k₂Length of l₂Line segment L of₂46; repetition ofExecuting the steps from Step7 to Step17 until the incident ray is divided by theline segment L₂46 and the profile curve S of the secondary mirror_DThe secondary reflected light obtained by reflection is all related to theline segment L_d33 at the appropriate location;

step19, repeating the steps from Step7 to Step18 until the maximum distance between thesection line segment 47 of theprimary reflector 1 and thecenter connecting line 8 is equal to the radius F of theprimary reflector 1;

step 20, adjusting the slope k of all thesectional line segments 47 of theprimary mirror 1₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with theline segment L_d33 intersect at a suitable location.

The step (6) comprises the following steps:

(6-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incidentlight ray P₀36 and strikes on thesmall lens 5 of theprimary mirror 1;

(6-2) if the light beam emitted by the laser falls on the line segment L after being reflected by theprimary reflector 1 and thesecondary reflector 2_d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incidentlight ray P₀36 and hit on anothersmall lens 5 of theprimary reflector 1 and repeat the above test steps; if not, theline segment L_d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.

Example 3

The secondary reflectingmirror 2 of the present embodiment is a spherical concave mirror, and the design method mainly comprises six steps: (1) as shown in fig. 7, SolidWorks is selected as a three-dimensional design tool, and a cross-sectional view of theprimary reflector 1 is made by using a sketch function of the SolidWorks; (2) as shown in fig. 8, the sectional view of theprimary reflecting mirror 1 is rotated by one turn with the central connectingline 8 of theprimary reflecting mirror 1 and the secondary reflectingmirror 2 as an axis to generate a perspective view of theprimary reflecting mirror 1; (3) as shown in fig. 9, the mounting position of thesmall mirror 5 is made on the perspective view of theprimary mirror 1; (4) selecting optical simulation software LightTools to perform optical simulation on the whole collecting lens including theprimary reflector 1 and thesecondary reflector 2, and verifying whether the light paths of the primary reflected light and the secondary reflected light meet the design requirements or not; (5) making the stereogram of the condenser into a real object; (6) and carrying out condensation test on the real object of the condenser by using a laser.

The step (1) comprises the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: radius F of theprimary mirror 1;

r: when thesecondary reflector 2 is a spherical mirror, the spherical radius of thesecondary reflector 2 is larger;

h: the distance between the primarymirror reference surface 16 and the secondarymirror reference surface 6;

h: the distance between thelight collection area 7 and the primarymirror reference plane 16;

d: radius of the edge profile of thesecondary mirror 2;

d: the radius of the edge profile of thelight collecting area 7;

step 2, drawing across-sectional outline 34 of the outer shell of theheat storage container 17 on a sketch of SolidWorks;

step 3, drawing a line L on the sketch ofSolidWorks_d33 denotes a light-collectingregion 7; line segment L_dThe function of 33 is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line L on the sketch ofSolidWorks_D35 represents the projection of the profile of thesecondary mirror 2 in the X-axis direction; line segment L_DThe function of 35 is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passingline section L_D35 as a function S of the profile of thequadratic mirror_D53; function of thecurve S_D53 is: :

step6, passingline section L_d33 and line segment L_DThe midpoint of 35 is taken as a central connectingline 8; the function of thecenter connecting line 8 is: x is D;

step7, selecting point (x)₁,y₁)37, the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁)37 as a slope k₁Length of l₁Line segment L of₁36, the line segment representing the cross section of thesmall lens 5; line segment L₁The function of 36 is: k is₁(x-x₁)+y₁,x∈(x₁,x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁Starting point of 36 (x)₁,y₁)37 asincident light P₀38; incident light ray P₀The function of 38 is: x ═ x₁；

Step9, passingline section L₁36 asincident ray T₀39; incident ray T₀The function of 39 is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10,segment L₁36 is regarded as a section of a plane reflector, and the incident ray P is calculated according to the law ofoptical reflection₀38 of primary reflectedlight ray P₁40; primary reflected light ray P₁The slope of 40 is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞,x₁)；

Step 11,segment L₁36 is regarded as the section of a plane reflector, and the incident ray T is calculated according to the law ofoptical reflection₀39 primary reflectedray T₁41; primary reflected light ray T₁The slope of 41 is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞,x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflectedlight P₁40 and the section curve S_DCross point (x) of₂,y₂)42；

Step 13, calculating the primary reflectedray T₁41 and the cross-sectional curve S_DCross point (x) of₃,y₃)43；

Step 14, passing Point (x)₂,y₂)42 make a primary reflectedlight ray P₁40 in the cross-sectional curve S_DSecondary reflected light ray P at 53₂44; secondary reflected light P₂(44) The slope of (d) is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

Step15, passing Point (x)₃,y₃)43 make a primary reflectedray T₁41 in the cross-sectional curve S_DSecondary reflected ray T at 53₂45, a first step of; secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

Step16, calculating the secondary reflectedlight P₂44 andline segment L_d33, the intersection point; if the light ray P is reflected twice₂44 andline segment L_d33 intersect at the right place and not with theedge contour line 34 of the outer shell of thethermal storage container 17, the next Step17 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step15 until the secondary reflectedlight ray P₂44 andline segment L_d33 intersect at suitable locations and not with the thermal storage container17, theedge contour lines 34 of the shells intersect;

step17, calculating the secondary reflectedray T₂45 andline segment L_d33, the intersection point; if the light ray T is reflected twice₂45 andline segment L_d33 intersect at the right place and not with theedge contour line 34 of the outer shell of thethermal storage container 17, the next Step18 is performed; otherwise change the line segment L₁Slope k of 36₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflectedlight ray T₂45 andline segment L_d33 intersect at suitable locations and do not intersect with theedge contour lines 34 of the housing of thethermal storage container 17;

step18, selectingline segment L₁36 as a starting point and making a slope of k₂Length of l₂Line segment L of₂46; repeating the steps from Step7 to Step17 until the incident ray is divided by theline segment L₂46 and the profile curve S of the secondary mirror_DThe secondary reflected light obtained by reflection is all related to theline segment L_d33 at the appropriate location;

step19, repeating the steps from Step7 to Step18 until the maximum distance between thesection line segment 47 of theprimary reflector 1 and thecenter connecting line 8 is equal to the radius F of theprimary reflector 1;

step 20, adjusting the slope k of all thesectional line segments 47 of theprimary mirror 1₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with theline segment L_d33 intersect at a suitable location.

The step (6) comprises the following steps:

(6-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incidentlight ray P₀36 and strikes on thesmall lens 5 of theprimary mirror 1;

(6-2) if the light beam emitted by the laser falls on the line segment L after being reflected by theprimary reflector 1 and thesecondary reflector 2_d30, the position of the laser is changed so that the beam of light emitted by the laser is parallel to the incidentlight ray P₀36 and strikes anothersmall lens 5 of theprimary reflector 1 andrepeating the above test steps; if not, theline segment L_d30, the step of utilizing SolidWorks to make a three-dimensional drawing of the disc-type solar condenser is executed again.

Claims (2)

1. A preparation method of a disc type solar condenser is characterized by comprising the following steps:

the collecting mirror consists of a primary reflecting mirror (1) and a secondary reflecting mirror (2); a plurality of small lenses (5) cut by plane mirrors are arranged on the primary reflector (1) and reflect incident light rays (12) to the secondary reflector (2); the secondary reflector (2) is positioned above the primary reflector (1) and is formed by cutting a whole reflector, and the incident light (12) reflected by the primary reflector (1) is reflected into the heat storage container (17) again;

the primary reflector (1) is a hollow annular structure, and the edges of the annular structure are an outer ring (14) and an inner ring (15); a small lens (5) is laid between the outer ring (14) and the inner ring (15); a heat storage container (17) is arranged in the inner ring (15);

the plane where the inner ring (15) is located is a primary mirror reference plane (16); the plane where the edge profile of the secondary reflector (2) is located is a secondary reflector reference surface (6); the secondary mirror reference surface (6) is parallel to the primary mirror reference surface (16);

connecting the circle center of the inner ring (15) with the circle center of the edge profile of the secondary reflector (2) to obtain a straight line which is a central connecting line (8); the central connecting line (8) is vertical to the primary mirror reference surface (16);

selecting the surface of a heat-insulating glass window (25) of the heat storage container (17) closest to the secondary reflector (2) as a light collecting area (7), and if incident light (12) can be reflected to the light collecting area (7) by the primary reflector (1) and the secondary reflector (2), the incident light can enter the heat storage container (17) certainly;

the preparation method comprises the following steps:

(1) making a three-dimensional view of a condenser lens according with the design target according to the actual application scene and the requirements of customers;

(2) optical simulation software is selected to perform optical simulation on the three-dimensional image of the condenser lens, and whether the light paths of the primary reflection light and the secondary reflection light meet the design requirements or not is verified;

(3) preparing a condenser according to the stereogram of the condenser;

(4) carrying out a condensation test on the condenser by using the laser, and if the light beam emitted by the laser is not reflected to the light-collecting area (7), returning to the step (1) to modify the stereogram of the condenser; ensuring that the incident light (12) can enter the light collecting area (7) under the reflection of the primary reflector (1) and the secondary reflector (2) and can not be blocked by the shell of the heat storage container (17);

the step (1) comprises the following steps:

(1-1) making a cross-sectional view of the primary mirror (1) on an XY plane;

(1-2) rotating the cross-sectional view of the primary reflector (1) for one circle by taking a central connecting line (8) as an axis to generate a three-dimensional view of the primary reflector (1);

(1-3) making the installation position of the small lens (5) on the perspective view of the primary reflector (1);

(1-4) making a perspective view of the secondary reflector (2); the stereoscopic view of the secondary reflector (1) and the stereoscopic view of the primary reflector (1) form a stereoscopic view of the condenser;

the step (1-1) comprises the following steps:

step1, selecting design parameters of a condenser according to actual application scenes and requirements of customers:

f: the radius F of the primary reflector (1);

r: when the secondary reflector (2) is a spherical mirror, the spherical radius of the secondary reflector (2) is larger than the spherical radius of the spherical mirror;

h: the distance between the primary mirror reference surface (16) and the secondary mirror reference surface (6);

h: the distance between the light collection area (7) and the primary mirror reference surface (16);

d: the radius of the edge profile of the secondary reflector (2);

d: the radius of the edge profile of the light collecting area (7);

step 2, making a cross-sectional contour line (34) of the shell of the heat storage container (17) on an XY plane;

step 3, drawing a line segment L on the XY plane diagram_d(33) Representative setA light region (7); line segment L_d(33) The function of (d) is: h, x belongs to (D-D, D + D), and the coordinates of the middle point are as follows: (D, h);

step 4, drawing a line segment L on the XY plane diagram_D(35) Represents the projection of the profile of the secondary reflector (2) in the X-axis direction; line segment L_D(35) The function of (d) is: h, x ∈ (0,2D), and the midpoint coordinate is: (D, H);

step 5, passing line section L_D(35) Two end points of the curve function S of the profile contour of the quadratic reflector_D；

If the secondary mirror is a plane mirror, the curve function S_D(51) Comprises the following steps: h, x ∈ (0, 2D);

if the quadratic mirror is a spherical convex mirror, the curve function S_D(52) Comprises the following steps:

if the secondary reflector is a spherical concave mirror, the curve function S_D(53) Comprises the following steps:

step6, passing line section L_d(33) And line segment L_D(35) The middle point of (2) is taken as a central connecting line (8); the function of the center line (8) is: x is D;

step7, selecting point (x)₁,y₁) (37), the value range is: x is the number of₁≥2D，y₁0; passing point (x)₁,y₁) (37) making a slope k₁Length of l₁Line segment L of₁(36) The line represents the section of the small lens (5); line segment L₁(36) The function of (d) is: k is₁(x-x₁)+y₁,x∈(x₁,x₁+l₁cos(tan^-1(k₁)))；

Step 8, passing line section L₁(36) Starting point (x) of (c)₁,y₁) (37) as incident light ray P₀(38) (ii) a Incident light ray P₀(38) The function of (d) is: x ═ x₁；

Step9, passing through line segment L₁(36) End point of (1) as incident ray T₀(39) (ii) a Incident ray T₀(39) The function of (d) is: x ═ x₁+l₁cos(tan^-1(k₁))；

Step 10, segment L₁(36) The incident light P is calculated according to the optical reflection law and is regarded as the section of a plane reflector₀(38) Primary reflected light ray P₁(40) (ii) a Primary reflected light ray P₁(40) The slope of (d) is: k is a radical of_P1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁)+y₁,x∈(-∞,x₁)；

Step 11, segment L₁(36) The incident ray T is calculated according to the law of optical reflection₀(39) Primary reflected light ray T₁(41) (ii) a Primary reflected light ray T₁(41) The slope of (d) is: k is a radical of_T1＝tan(π/2+2tan^-1(k₁) Functions are: y-tan (pi/2 +2 tan)^-1(k₁))(x-x₁-l₁cos(tan^-1k₁))+k₁l₁cos(tan^-1(k₁))++y₁,x∈(-∞,x₁+cos(tan^-1k₁))；

Step 12, calculating the primary reflected light P₁(40) And the section curve S_DCross point (x) of₂,y₂)(42)；

Step 13, calculating the primary reflected ray T₁(41) And the section curve S_DCross point (x) of₃,y₃)(43)；

Step 14, passing Point (x)₂,y₂) (42) making a primary reflected light ray P₁(40) In the section curve S_DUpper secondary reflected light ray P₂(44)；

If the secondary mirror is flatMirror for reflecting the secondary reflected light P₂(44) The slope of (d) is: k is a radical of_P1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₂)+y₂,x∈(-∞,x₂)；

If the secondary reflector is a spherical convex mirror, the secondary reflected light P₂(44) The slope of (d) is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

If the secondary reflector is a spherical concave mirror, the secondary reflected light ray P₂(44) The slope of (d) is: k is a radical of_P2＝tan(tan^-1k_P1-2θ₁) The function is: y is tan (tan)^-1k_P1-2θ₁)(x-x₂)+y₂,x∈(-∞,x₂) Wherein theta₁＝tan^-1|(k_m1-k_P1)/(1+k_m1k_P1)|，

Step15, passing Point (x)₃,y₃) (43) making a primary reflected ray T₁(41) In the section curve S_DUpper secondary reflected ray T₂(45)；

If the secondary reflector is a plane mirror, the secondary reflected light ray T₂(45) The slope of (d) is:k_T1＝tan(π-tan^-1(k₁) Functions are: y-tan (pi-tan)^-1(k₁))×(x-x₃)+y₃,x∈(-∞,x₃)；

If the secondary reflector is a spherical convex mirror, the secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

If the secondary reflector is a spherical concave mirror, the secondary reflected light ray T₂(45) The slope of (d) is: k is a radical of_T2＝tan(tan^-1k_T1-2θ₂) The function is: y is tan (tan)^-1k_T1-2θ₂)(x-x₃)+y₃,x∈(-∞,x₃) Wherein theta₂＝tan^-1|(k_m2-k_T1)/(1+k_m2k_T1)|，

Step16, calculating the secondary reflected light P₂(44) And line segment L_d(33) The intersection point of (a); if the light ray P is reflected twice₂(44) And line segment L_d(33) Intersecting at a suitable position and not intersecting the edge contour (34) of the outer shell of the heat accumulation container (17), the next Step17 is performed; otherwise change the line segment L₁(36) Slope k of₁And length l₁And repeatAll the steps from Step7 to Step15 are executed until the secondary reflected light ray P₂(44) And line segment L_d(33) Intersects the edge contour (34) of the outer shell of the heat storage container (17) at a proper position and does not intersect the edge contour;

step17, calculating the secondary reflected ray T₂(45) And line segment L_d(33) The intersection point of (a); if the light ray T is reflected twice₂(45) And line segment L_d(33) Intersecting at a suitable position and not intersecting the edge contour (34) of the outer shell of the heat accumulation container (17), the next Step18 is performed; otherwise change the line segment L₁(36) Slope k of₁And length l₁And repeating all the steps from Step7 to Step16 until the secondary reflected light ray T₂(45) And line segment L_d(33) Intersects the edge contour (34) of the outer shell of the heat storage container (17) at a proper position and does not intersect the edge contour;

step18, selecting line segment L₁(36) Is taken as a starting point, and a slope of k is taken as₂Length of l₂Line segment L of₂(46) (ii) a Repeating the steps from Step7 to Step17 until the incident ray is divided by the line segment L₂(46) And profile curve S of secondary reflector_DThe secondary reflected light obtained by reflection is all related to the line segment L_d(33) Intersecting at a suitable position;

step19, repeating the steps from Step7 to Step18 until the maximum distance between the section line segment (47) of the primary reflector (1) and the center connecting line (8) is equal to the radius F of the primary reflector (1);

step 20, adjusting the slope k of all the section line segments (47) of the primary reflector (1)₁And length l₁Repeating the steps from Step6 to Step19 until all the secondary reflected rays are aligned with the line segment L_d(33) Intersecting at the appropriate location.

2. The method of claim 1, wherein the method comprises the following steps: the step (4) comprises the following steps:

(3-1) adjusting the angle and direction of the laser so that the beam emitted by the laser is parallel to the incident light ray P₀(38) And hit on a small lens (5) of the primary reflector (1)；

(3-2) if the light beam emitted by the laser falls on the line segment L after being reflected by the primary reflector (1) and the secondary reflector (2)_d(33) In the representative light-collecting region (7), the position of the laser is changed so that the light beam emitted by the laser is parallel to the incident light beam P₀(38) And the lens is shot on the other small lens (5) of the primary reflector (1), and the testing steps are repeated; otherwise, returning to the step (1) and modifying the perspective view of the collecting lens until all the small lenses (5) can reflect the light beams emitted by the laser into the light collecting area (7).

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