It is a kind of using carbon dioxide as heat accumulation and do work working medium groove type solar photo-thermal power generationSystemTechnical field
The present invention relates to a kind of solar light-heat power-generation system, belong to solar energy thermal-power-generating technical field.
Background technology
In the various novel energies developed, solar energy is that wherein most noticeable, most widely used, research work is mostA kind of novel energy.Solar energy need not be exploited and transported, not by any state monopoly, be the cheap energy being available anywhere；It is cleaned and safety, does not produce pollution in use.Therefore it can say, once solar energy can be controlled perfectly, it is by the mankind'sScience and technology and production bring beautiful prospect.Simultaneously solar energy resources shortcoming be reach earth surface energy-flux density it is low, andBy round the clock, the factor such as season and fine dark clouds rain influenceed, energy supply is interruption and unstable.
Groove type solar solar-thermal generating system traditional at present is mostly using conduction oil as collection hot working fluid, due to heat-conductive-oil high-temperatureThen the heat of conduction oil can only be turned heat to device of working medium by the limitation of cracking, light and heat collection system by heat-conducting oil heating to 400 DEG CCarry out acting generating, it is therefore desirable to substantial amounts of water resource, and the abundant area of China's sunlight-heat reaources mostly concentrates on northwest droughtThe region of water shortage, is influenceed solar light-heat power-generation power station to be carried out in northwest drought water shortage region practical, together by regionWhen solar energy resources shortcoming be reach earth surface energy-flux density it is low, and by round the clock, season and fine dark clouds rain etc. becauseThe influence of element, energy supply is interruption and unstable, therefore is badly in need of providing a kind of photo-thermal by the use of other media as acting working mediumElectricity generation system, can meet the generating of northwest drought region and use, while not restricted by factors such as fine dark clouds rain, realize people coupleThe demand of electricity.
The content of the invention
The invention aims to solve above-mentioned technical problem, and then one kind is provided using carbon dioxide as heat accumulation and actingThe groove type solar solar-thermal generating system of working medium.
Technical scheme：
A kind of groove type solar solar-thermal generating system using carbon dioxide as heat accumulation and working medium of doing work includes heat collector, heatOil tank, heat exchanger, cold oil tank, preheater, high temperature carbon dioxide storage tank, low-temperature carbon dioxide storage tank, steam turbine and generator, instituteThe steam turbine stated is connected with generator；
Described heat collector includes the slot type collecting plate that multiple arrays are set, the notch of the longitudinally disposed collecting plate of each columnThe inner is provided with thermal-collecting tube, and many upper ends of thermal-collecting tube being set up in parallel conflux to form a conduction oil output channel, describedConduction oil output channel connected by deep fat tank with the heat conductive oil inlet end of heat exchanger, the described many thermal-arrests that are set up in parallelThe lower end of pipe confluxes to form a conduction oil input channel, and conduction oil input channel is connected with cold oil tank, and cold oil tank passes through preheatingDevice is connected with the conduction oil outlet end of heat exchanger；
The high temperature carbon dioxide port of export and low-temperature carbon dioxide entrance point are additionally provided with described heat exchanger, described changesThe high temperature carbon dioxide port of export of hot device is bifurcated, wherein a branch road is directly connected with steam turbine, another is communicated with high temperatureCarbon dioxide storage tank, and be finally connected with steam turbine；The low-temperature carbon dioxide arrival end of described heat exchanger and low temperature titanium dioxideThe port of export of carbon storage tank is connected, and the arrival end of low-temperature carbon dioxide storage tank is connected with preheater.
It is preferred that：The inboard groove surface of described collecting plate is provided with parabolic lens, and described thermal-collecting tube is arranged on parabolicOn the center line of mirror.
It is preferred that：It is described it is a kind of using carbon dioxide as heat accumulation and the groove type solar solar-thermal generating system for working medium of doing work alsoIncluding compressor and cooler, one end of cooler is connected with steam turbine, and the other end of cooler passes through compressor and preheaterSet up connection.
It is preferred that：The connection of the arrival end of described low-temperature carbon dioxide storage tank and high temperature carbon dioxide storage tank and steam turbinePipeline sets up connection.
The invention has the advantages that：The present invention it is a kind of using carbon dioxide be heat accumulation and acting working medium slot type tooTower type solar of the positive energy solar-thermal generating system using carbon dioxide as heat accumulation working medium, can not only save water, and take full advantage ofThe carbon dioxide of trapping, reduces the discharge of greenhouse gases, while directly generated electricity using carbon dioxide working medium, and current popularSolar energy-steam power electricity generation system is compared, and system equipment is compact, and arrangement is simple, power plant thermal efficiency is improved, while with dioxyChange carbon more compact for the compressor power device structure of working medium, power plant thermal efficiency is high, and without phase transformation in system, it is simple in construction.
Brief description of the drawings
Fig. 1 is a kind of annexation using carbon dioxide as heat accumulation and the groove type solar solar-thermal generating system for working medium of doing workFigure；
Fig. 2 is the topology view of collecting plate；
1- heat collectors in figure, 2- deep fat tanks, 3- heat exchangers, 4- cold oil tanks, 5- preheaters, the storage of 6- high temperature carbon dioxidesTank, 7- low-temperature carbon dioxide storage tanks, 8- steam turbines, 9- generators, 10- compressors, 11- coolers, 12- collecting plates, 13- thermal-arrestsPipe, 14- conduction oil output channels, 15- conduction oil input channels.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, one kind of present embodiment is with carbon dioxideGroove type solar solar-thermal generating system for heat accumulation and working medium of doing work includes heat collector 1, deep fat tank 2, heat exchanger 3, cold oil tank4th, preheater 5, high temperature carbon dioxide storage tank 6, low-temperature carbon dioxide storage tank 7, steam turbine 8 and generator 9, described steam turbine 8It is connected with generator 9；
Described heat collector 1 includes the slot type collecting plate 12 that multiple arrays are set, the longitudinally disposed collecting plate 12 of each columnNotch the inner be provided with thermal-collecting tube 13, many upper ends of thermal-collecting tube 13 being set up in parallel conflux to form a conduction oil outputPipeline 14, described conduction oil output channel is connected by deep fat tank 2 with the heat conductive oil inlet end of heat exchanger 3, described manyThe lower end for the thermal-collecting tube 13 being set up in parallel confluxes to form a conduction oil input channel 15, conduction oil input channel 15 and cold oil tank4 connections, cold oil tank 4 is connected by preheater 5 with the conduction oil outlet end of heat exchanger 3；
The high temperature carbon dioxide port of export and low-temperature carbon dioxide entrance point are additionally provided with described heat exchanger 3, it is describedThe high temperature carbon dioxide port of export of heat exchanger 3 is bifurcated, wherein a branch road is directly connected with steam turbine 8, another is communicated withHigh temperature carbon dioxide storage tank 6, and be finally connected with steam turbine 8；The low-temperature carbon dioxide arrival end and low temperature of described heat exchanger 3The port of export of carbon dioxide storage tank 7 is connected, and the arrival end of low-temperature carbon dioxide storage tank 7 is connected with preheater 5.It is arranged such, collectsThermal 1 can be arranged in the reflected light that the sun is absorbed in the collecting plate 12 of the surrounding of heat collector 1 from it, and to being arranged in thermal-arrestThermal-collecting tube 13 in the notch of plate 12 is heated, and now the conduction oil in thermal-collecting tube 13 is heated that (low temperature conduction oil passes through grooveFormula heat collector is heated to 400 DEG C), the conduction oil after heating enters deep fat tank 2 by the conduction oil output channel 14 confluxed, withEnter heat exchanger 3 afterwards, at the same time, low-temperature carbon dioxide storage tank 7 inputs low-temperature carbon dioxide into heat exchanger 3, in heat exchanger 3In the presence of the heat of conduction oil is transmitted to carbon dioxide, the high temperature titanium dioxide that high temperature carbon dioxide now passes through heat exchanger 3Carbon outlet output, a portion, which is directly entered steam turbine 8, is used for the acting of steam turbine, and then realizes generating, passes through heat exchanger 3High temperature carbon dioxide outlet output another part high temperature carbon dioxide stored into high temperature carbon dioxide storage tank 6, whenSunlight was lacked or during night, the part high temperature carbon dioxide in storage tank be directly output to steam turbine be used for do work generating；ByHeat has been given carbon dioxide by the conduction oil after heat exchanger 3 exchanges heat, and the conduction oil after heat exchange enters after the preheating of preheater 5Cold oil tank 4, cold oil tank 4 is the medium (i.e. conduction oil) that heat collector 1 provides heat transfer；Now heat collector 1, deep fat tank2nd, heat exchanger 3, preheater 5 and cold oil tank 4 form the loop of a thermal-arrest, and heat collector 1 absorbs the heat of solar energy, and willHeat passes to heat exchanger 3 in the way of medium is transmitted, and interior and carbon dioxide storage tank offer with carbon dioxide in heat exchanger 3Heat exchange is carried out for the medium for working medium of doing work, this utilization carbon dioxide being capable of effectively save water money for the power generation operation of working mediumSource.
The present invention is set to supercritical carbon dioxide Brayton cycle applied to groove type solar solar-thermal generating systemMeter.Low temperature conduction oil is heated to 400 DEG C by groove type heat collector, then passes through heat exchanger and imparts heat to carbon dioxide, surpassesCritical carbon dioxide heat accumulation and electricity generation system include low-temperature carbon dioxide storage tank, compressor, cooler.The titanium dioxide of low-temp low-pressureCarbon gas first passes through compressor pressurization, then flows through heat exchanger and is heated to 380 DEG C, when sunny with conduction oil heat exchangeThe carbon dioxide of a part of HTHP pushes directly on steam turbine acting, and the carbon dioxide storage of another part HTHP is in heightIn warm carbon dioxide storage tank, when sunlight missing or night, the carbon dioxide direct generation of electricity in storage tank, then again through supercoolingDevice is cooled down, and is stored in low-temperature carbon dioxide storage tank.
Embodiment two：Illustrate present embodiment, the described collecting plate 12 of present embodiment with reference to Fig. 1 and Fig. 2Inboard groove surface parabolic lens is installed, described thermal-collecting tube 13 is arranged on the center line of parabolic lens.It is arranged such, the sunIncident light, which is irradiated to after slot type collecting plate 12, reflexes to thermal-collecting tube 13 under the reflex of the parabolic lens by its groove madial wallOn, now thermal-collecting tube absorbs solar energy as the heat-conducting oil heating of its inside, and this collecting plate 12 uses groove-like, can be effectiveCollect the light of sun reflection, focus it onto a point specified, and this point is exactly the installation site of thermal-collecting tube, by thisCollection hot mode effectively solve shine upon the earth energy-flux density it is low and the problem of cause the efficiency of light energy utilization poor, while thisThe slot type collecting plate 12 of kind of array is convenient for production, arrangement is simple, Stability Analysis of Structures, good for the Heat-collecting effect to solar energy, utilizesThis collection hot mode more can effectively improve collecting efficiency.
Embodiment three：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, one kind of present embodiment is with carbon dioxideIt is a kind of using carbon dioxide as heat accumulation and acting working medium described in the groove type solar solar-thermal generating system of heat accumulation and acting working mediumGroove type solar solar-thermal generating system also include compressor 10 and cooler 11, one end of cooler 11 is connected with steam turbine 8,The other end of cooler 11 is set up with preheater 5 by compressor 10 and is connected.It is arranged such, the carbon dioxide that steam turbine 8 is dischargedCarbon dioxide is transferred to preheater 5 in the presence of cooler 11 and compressor 10, the carbon dioxide after preheating is directly storedTo low-temperature carbon dioxide storage tank 7, this utilization carbon dioxide is that heat accumulation and the mode of acting working medium can reach higher cycling hotEfficiency, while this mode takes full advantage of the carbon dioxide of trapping, reduces the discharge of carbon dioxide, while directly utilizing promotionRemaining carbon dioxide generates electricity as working medium after steam turbine work, can effectively control the discharge degree of carbon dioxide, reduction by twoCarbonoxide improves environment as the principal element of global warming.
Embodiment four：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, one kind of present embodiment is with carbon dioxideFor heat accumulation and the arrival end and high temperature of the low-temperature carbon dioxide storage tank 7 done work described in the groove type solar solar-thermal generating system of working mediumCarbon dioxide storage tank 6 is set up with the connecting line of steam turbine 8 and connected.It is arranged such, when described enters high temperature carbon dioxideThe heat of the high temperature carbon dioxide of storage tank 6 is directly dumped in low-temperature carbon dioxide storage tank 7 it is impossible to meet during steam turbine actingPortion, such storing mode effectively utilizes carbon dioxide, it is to avoid the CO2 emission of whole power generation process, mitigates air dirtyDye, improves environmental quality.
Present embodiment is the exemplary illustration to this patent, does not limit its protection domain, people in the artMember can also be changed to its part, as long as no the Spirit Essence beyond this patent, all in the protection domain of this patent.