The content of the invention
In view of the above-mentioned problems of the prior art, the invention provides the groove type solar collecting system based on multiple reflections, its sun reflective optical assembly includes：Parabolic trough reflective mirror, the convex reflecting mirror below parabolic trough reflective mirror rotating shaft, the plane mirror of parabolic trough reflective mirror bottom portion of groove, the plane mirror on parabolic trough reflective mirror rotary shaft rack.Present invention also offers a kind of groove type solar heat collecting method based on multiple reflections simultaneously, solar irradiation is mapped on parabolic trough reflective mirror, first it is reflected on convex reflecting mirror, the plane mirror of bottom portion of groove is reflected to again, the plane mirror being reflected to again on rotary shaft rack, finally it is reflected on big thermal-collecting tube.Reduce the quantity of thermal-collecting tube, greatly reduce cost, substantially increase photo-thermal conversion efficiency, it is very practical.
The technical scheme is that：Groove type solar collecting system based on multiple reflections, including Mechanical tracking systems, sun reflective optical assembly and heat sink, it is characterised in that：The parabolic trough reflective mirror of array, by convex reflecting mirror and plane mirror thereon, sunshine is finally reflexed on big thermal-collecting tube by multiple reflections.The parabolic trough reflective mirror of array by Wire Friction Driving, realizes synchronous axial system between each other, i.e., the parabolic trough reflective mirror that can control all arrays with a motor rotates.The surrounding of the parabolic trough reflective mirror of array is installed with thermal-collecting tube and collecting plate, and the axis of thermal-collecting tube is parallel with the shaft axis of parabolic trough reflective mirror, and the axis of thermal-collecting tube is vertical with collecting plate.Thermal-collecting tube receives the sunshine that the parabolic trough mirror reflection of array comes, and collecting plate receives the sunshine of the parabolic trough reflective mirror cosine direction loss of array.The rotating shaft core of parabolic trough reflective mirror is at its its focal point, and the focus of convex reflecting mirror overlaps with it below rotating shaft.There is the plane mirror of fixed angle in parabolic trough reflective mirror bottom portion of groove, rotatable plane mirror is housed on the rotary shaft rack of parabolic trough reflective mirror, by its rotation of the control of individual motor.
Above-mentioned Mechanical tracking systems, it is characterised in that：The kind of drive of machinery uses Wire Friction Driving.The parabolic trough reflective mirror of array by Wire Friction Driving, realizes synchronous axial system between each other, i.e., the parabolic trough reflective mirror that can control all arrays with a motor rotates.According to the position of sunshine, controller sends instruction, motor, drives the parabolic trough reflective mirror of array to rotate together, follows position of sun all the time and move.
Above-mentioned sun reflective optical assembly, it is characterised in that：The rotating shaft core of parabolic trough reflective mirror is at its its focal point, and the focus of convex reflecting mirror overlaps with it below rotating shaft.There is the plane mirror of fixed angle in parabolic trough reflective mirror bottom portion of groove, rotatable plane mirror is housed on the rotary shaft rack of parabolic trough reflective mirror, by its rotation of the control of individual motor.
Above-mentioned heat sink, it is characterised in that：The surrounding of the parabolic trough reflective mirror of array is installed with thermal-collecting tube and collecting plate, and the axis direction of thermal-collecting tube and the diameter parallel of parabolic trough reflective mirror, the axis of thermal-collecting tube are vertical with collecting plate.Thermal-collecting tube receives the sunshine that the parabolic trough mirror reflection of array comes, and collecting plate receives the sunshine of the parabolic trough reflective mirror cosine direction loss of array.
The heat collecting method of groove type solar collecting system based on multiple reflections, specific steps include：
Step A：Groove type solar collecting system based on multiple reflections is installed, including sun reflective optical assembly, Mechanical tracking systems and heat sink, the sun reflective optical assembly includes nearby having fixed convex reflecting mirror below the focus of parabolic trough reflective mirror, the bottom portion of groove of parabolic trough reflective mirror has a fixed pan speculum, has rotatable plane mirror on the rotary shaft rack at the top of parabolic trough reflective mirror.The parabolic trough reflective mirror that the Mechanical tracking systems include array passes through Wire Friction Driving between each other.The four sides that the heat sink includes the parabolic trough reflective mirror of rectangular array is vertical with collecting plate round thermal-collecting tube and collecting plate, the axis direction of thermal-collecting tube and the diameter parallel of parabolic trough reflective mirror, the axis of thermal-collecting tube；
Step B：According to the position of sunshine, controller sends instruction, and motor drives the parabolic trough reflective mirror rotation of array, from sun to sun, makes the parabolic trough reflective mirror face sun, with ensure sunshine all the time vertical irradiation on parabolic trough reflective mirror.The sunshine being irradiated on parabolic trough reflective mirror, after the focusing of parabolic trough reflective mirror, sunshine is accumulated on convex reflecting mirror, and convex reflecting mirror reflexes to sunshine on bottom portion of groove fixed pan speculum.The plane mirror that bottom portion of groove is fixed reflexes to sunshine on rotary shaft rack on rotatable plane mirror again, and the plane mirror of rotation finally reflexes to sunshine on thermal-collecting tube.
The beneficial effects of the invention are as follows：The position of thermal-collecting tube and collecting plate in heat sink of the present invention is arranged on the surrounding of the parabolic trough reflective mirror of array, and the quantity of thermal-collecting tube is reduced, and cost substantially reduces.Collecting plate receives the sunshine of the parabolic trough reflective mirror cosine direction loss of array, substantially increases photo-thermal conversion efficiency, very practical.The mechanical kind of drive of Mechanical tracking systems of the present invention uses Wire Friction Driving, and its simple production process, production, installation, maintenance cost are extremely low, its light weight, occupy little space, high transmission accuracy, can be run in adverse circumstances.In sun reflective optical assembly of the present invention, rotatable plane mirror is housed on the rotary shaft rack of parabolic trough reflective mirror, by its rotation of the control of individual motor, therefore, sunshine in each parabolic trough mirror surface can be reflexed to accurately on thermal-collecting tube, substantially increase photo-thermal conversion efficiency.
When the thermal energy exchange dielectric material in heat conducting pipe uses water, heat-exchange device of the invention can produce high-temperature water vapor, with relatively low cost, be widely used in life heating, industrial heating.The present invention can also combine steam turbine, stirling generator etc., with relatively low cost, carry out solar light-heat power-generation.Meanwhile also, with reference to vacuum heat-insulation technology, high heat-storing material etc., carry out solar energy heat-storage using heat exchange medium materials such as heat storage capacity strong, high temperature resistant, higher boilings and generate electricity.
Embodiment
It is the overall structure diagram of the groove type solar collecting system based on multiple reflections as shown in Figure 1.The surrounding of the parabolic trough reflective mirror 1 of array is installed with thermal-collecting tube 2 and collecting plate 3, and the axis of thermal-collecting tube 2 and the diameter parallel of parabolic trough reflective mirror 1, the axis of thermal-collecting tube 2 are vertical with collecting plate 3.Thermal-collecting tube 2 receives the sunshine that the parabolic trough reflective mirror 1 of array reflects back, and collecting plate 3 receives the sunshine of the cosine direction of parabolic trough reflective mirror 1 loss of array.
It is illustrated in figure 2 parabolic trough reflective mirror North and South direction cutting plane light conduction schematic diagram.First, sunshine is radiated on the surface of parabolic trough reflective mirror 1, and sunshine is accumulated on convex reflecting mirror 4, and convex reflecting mirror 4 reflexes to sunshine on plane mirror 5.Plane mirror 5 is solidified as a whole with parabolic trough reflective mirror 1, has fixed angle relative to horizontal direction.Plane mirror 5 reflexes to sunshine on rotatable plane mirror 6 again, and plane mirror 6 is finally reflected to directional light on thermal-collecting tube.Parabolic trough reflective mirror 1 is fixed as one with support 10, and it can be rotated around axle 8.The kind of drive of machinery uses Wire Friction Driving.Sun light tracking process, parabolic trough reflective mirror 1, with rotation, carry out a secondary tracking to the sun in every five minutes by a motor, as the sun rotates appropriate angle, make sun face parabolic trough reflective mirror 1 all the time.Now, rotatable plane mirror 6 is by another independent motor with the appropriate angle of rotation, remain that parabolic trough reflective mirror 1, fixed pan speculum 5, the relative position of rotatable plane mirror 6, relative angle are invariable all the time, and then ensure that light finally can be reflexed to accurately on thermal-collecting tube 2.Thermal-collecting tube 2 is collected into after the sunray of high-energy a variety of occasions such as can apply to warm oneself, illuminate, generate electricity.
It is illustrated in figure 3 single parabolic trough reflective mirror east-west direction cutting plane light conduction schematic diagram.First, on the plane mirror 5 of the bottom centre of sunshine irradiation parabolic trough reflective mirror 1, it is re-reflected on convex reflecting mirror 4, is re-reflected on collecting plate 3.Collecting plate has certain height, can directly absorb the sunshine for being radiated at its surface, reduces the sun light loss in the cosine direction of parabolic trough reflective mirror 1, moreover it is possible to keep out the wind, protect the other equipments such as in-between array parabolic trough reflective mirror.
In the present embodiment, the kind of drive using Wire Friction Driving machinery, parabolic trough reflective mirror 1, with rotation, carry out a secondary tracking in every five minutes by a motor to the sun, as the sun rotates appropriate angle, make sun face parabolic trough reflective mirror 1 all the time.Now, rotatable plane mirror 6 is by another motor with the appropriate angle of rotation, remain that parabolic trough reflective mirror 1, fixed pan speculum 5, the relative position of rotatable plane mirror 6, relative angle are invariable all the time, and then ensure that light can be finally reflexed on thermal-collecting tube 2, it is Mechanical tracking systems motion process.
In the present embodiment, the sunshine is radiated on the surface of parabolic trough reflective mirror 1, and sunshine is accumulated on convex reflecting mirror 4, and convex reflecting mirror 4 reflexes to sunshine on plane mirror 5.Plane mirror 5 reflexes to sunshine on rotatable plane mirror 6 again, and plane mirror 6 is finally reflected to directional light on thermal-collecting tube, is sun reflective optical assembly motion process.In the present embodiment, the thermal-collecting tube 2 and collecting plate 3 of the parabolic trough reflective mirror surrounding distribution of the array are heat sink.
It is described above; only it is presently preferred embodiments of the present invention; not the present invention is imposed any restrictions, every any simple modification, change and equivalent structure made according to the technology of the present invention essence above example changes, and is still within the scope of the technical scheme of the invention.