Solar photovoltaic-thermal conversion device based on plate heat pipe cooling
Technical field:
Title of the present utility model is based on the solar photovoltaic-thermal conversion device of plate heat pipe cooling, belongs to solar photovoltaic-heat utilization engineering field.
Background technology:
In the heat utilization mode of solar energy, it is one of at present more common mode that the photovoltaic of solar energy electricity utilizes.Photovoltaic electricity to solar energy utilizes existing more research at present, but the photovoltaic of solar energy electricity utilization ratio is low, generally have only 10~20%, therefore in the photovoltaic electricity transfer process of solar energy, can cause the thermal waste of very big solar energy on the one hand, the heat energy that does not convert electric energy simultaneously to also can cause the rising of solar-energy photo-voltaic cell temperature, and according to research, the conversion efficiency of solar-energy photo-voltaic cell reduces along with the rising of inversion temperature, thereby be unfavorable for the photovoltaic electricity conversion of solar energy more, according to the study, this unnecessary heat can cause conversion efficiency to descend 3~6% to the heating of solar-energy photo-voltaic cell, therefore be necessary to cool off, by cooling, can improve on the one hand the photoelectric conversion efficiency of solar energy, on the other hand by certain type of cooling the in addition heat utilization of getting up of unnecessary heat? recovery, as refrigeration, heating, therefore the photovoltaic electricity-thermal conversion device and the system of solar energy just appearred in desalination and produce steam etc.
From domestic and foreign literature and license situation, the cooling system of the present solar photovoltaic transfer process that adopts, mostly be forced convertion cooling and free convection cooling dual mode greatly, wherein utilize the forced convertion cooling of water and air to be proved to be and be effective and efficient manner comparatively at present.Yet should be noted that, its temperature rises coolant absorbs the heat of solar photovoltaic cell panel in flow process after, and by solar radiation etc. density of heat flow rate, (there is heat conduction in the complexity that inhomogeneities that cooling fluid distributes and solar photovoltaic-thermal conversion internal system is conducted heat, three kinds of heat transferred modes of convection current and radiation heat transfer), this moment, the temperature of solar photovoltaic cell panel should not be uniform, the working temperature that also is solar-energy photo-voltaic cell should increase on the flow direction of fluid, therefore cause the photovoltaic cell cooling effect inequality on the solar photovoltaic cell panel, sometimes even can produce " focus " problem, this is disadvantageous to photoelectric conversion efficiency of improving solar-energy photo-voltaic cell; Simultaneously because the inhomogeneities of solar-energy photo-voltaic cell working temperature, the adjusting of solar photovoltaic-thermal conversion system works temperature has also been brought inconvenience.Therefore be necessary to adopt a kind of new type of cooling, can reach efficient cooling effect, the working temperature uniformity that can keep each solar-energy photo-voltaic cell on the solar photovoltaic cell panel again, and working temperature is easy to adjust, this opto-electronic conversion performance to the overall performance, particularly solar energy of raising solar photovoltaic-thermal conversion system is very favourable.
The utility model content:
The technical problems to be solved in the utility model provides a kind of solar photovoltaic-thermal conversion device that cools off based on plate heat pipe efficiently.Average temperature performance when making full use of on the one hand plate heat pipe work and working temperature make things convenient for adjustability, utilize the efficient heat transfer performance of plate heat pipe itself on the other hand and install the characteristics that fin reinforcing conducts heat easily additional at condensation end, not only can solve solar panel non-uniform temperature and " focus " problem in solar photovoltaic-thermal conversion system, improve the conversion efficiency and the security performance of solar photovoltaic-thermal conversion system, but also can realize the adjustability that makes things convenient for of solar-energy photo-voltaic cell working temperature, structure is compacter more than conventional heat pipe simultaneously.
For solving the problems of the technologies described above, the utility model is achieved through the following technical solutions:
Mainly solar photovoltaic-thermal conversion the device of being made up of solar-energy photo-voltaic cell module 1, solar photovoltaic cell panel 10, glass cover-plate 7, glass side seal 8, plate heat pipe evaporation ends 13, plate heat pipe condensation end 15, insulation material 4, cooling channels 18, cooling channels base plate 12, cooling channels side seal 19, cooling fluid inlet header 5, cooling fluid outlet header 2, cooling fluid entrance sleeve 6 and cooling fluid discharge connection 3 based on plate heat pipe cooling is characterized in that: glass cover-plate 7 and glass side seal 8 composition enclosure spaces; Solar-energy photo-voltaic cell module 1 is the rectangular arranged mode of rule on solar photovoltaic cell panel 10; Plate heat pipe evaporation ends 13 closely contacts with solar photovoltaic cell panel 10; Between plate heat pipe evaporation ends 13 peaceful plate shaped heat pipe condensation ends 15 is enclosed vacuum cavity 17; Be provided with the metal fin 11 that is parallel to each other in the vacuum cavity 17 between plate heat pipe evaporation ends 13 and plate heat pipe condensation end 15; Vacuum cavity 17 internal faces of metal fin 11 surperficial peaceful plate shaped heat pipes are equipped with the wick 14 of working medium backflow for liquid; The cooling channels entrance point is provided with cooling fluid inlet header 5 and cooling fluid entrance sleeve 6, and the cooling channels port of export is provided with cooling fluid outlet header 2 and cooling fluid discharge connection 3.
Metal fin 11 in the plate heat pipe of the present utility model, be to make by the high thermal conductivity coefficient material, has the high heat transfer effect, and play a supportive role, and adjacent two metal fins below the solar-energy photo-voltaic cell module 1 are provided with in the plane bilateral symmetry vertical with solar photovoltaic cell panel 10 at every row's solar-energy photo-voltaic cell module 1 central axis place, and its spacing equals solar-energy photo-voltaic cell module 1 width in an inclined direction; On metal fin 11, have regularly arranged circular aperture 9, be communicated with each the little vacuum cavity that is separated by metal fin 11, circular aperture 9 on the metal fin 11 all is positioned at the top of metal fin 11 longitudinal center lines, and being centered close on same the straight line of circular aperture 9, its diameter is less than highly half of metal fin 11.
Be provided with in the cooling channels 18 of plate heat pipe condensation end of the present utility model 15 belows and be used for augmentation of heat transfer and passive radiating fin 16, the length direction of radiating fin 16 is identical with the flow direction of cooling fluid, and the axial centre cross section of each radiating fin overlaps with the axial centre cross section of each little vacuum cavity.
The utility model compared with prior art has following characteristics: (1) is compared with traditional heat pipe, the plate heat pipe that the utility model adopts is owing to inner each little vacuum cavity interconnects, can make density of heat flow rate be tending towards even to greatest extent, thereby the working temperature that more can guarantee each solar-energy photo-voltaic cell is identical, the temperature uniformity on solar photovoltaic cell panel surface, improved the photoelectric conversion efficiency of whole device and effectively avoided " focus " problem on the solar photovoltaic cell panel, operational reliability is good; And compare with conventional heat pipe, the structure of whole device is compact more, can reduce the floor space of device.(2) plate inside heat pipe is equipped with the metal fin that is connected between plate heat pipe evaporation ends and the plate heat pipe condensation end, vacuum cavity that will be bigger replaces with a large amount of little vacuum cavities, not only shortened the path that liquid working substance refluxes, improved the axial thermal conductivity of heat pipe, strengthened heat-transfer effect, also played and supported the effect of going up lower wall surface, thereby strengthened the mechanical strength of heat pipe.(3) utilize the convenient adjustable characteristics of plate heat pipe working temperature, the working temperature of the solar-energy photo-voltaic cell of whole device can be as required by changing the operate outside condition of heat pipe, wait as temperature, the flow of cooling fluid to reach the purpose of regulating the solar-energy photo-voltaic cell working temperature.(4) heat exchange efficiency height: adopt plate heat pipe, the radiating fin parallel with fluid flow direction is housed in the cooling channels of plate heat pipe condensation end simultaneously, can effectively improve the heat-transfer effect of cooling fluid, particularly when cooling fluid was air, effect was more obvious.(6) surface of the metal fin in the plate heat pipe is equipped with liquid sucting core structure with the heat pipe inner surface, makes the capillary force of liquid return strengthen greatly, can adopt plate heat pipe evaporation ends last, plate heat pipe condensation end under set-up mode.
Description of drawings:
Fig. 1 is the utility model structural representation, and Fig. 2 is the A-A cross section view of Fig. 1, and Fig. 3 is the B-B cross section view of Fig. 1.
Wherein: 1-solar-energy photo-voltaic cell module; 2-cooling fluid outlet header; 3-cooling fluid discharge connection; The 4-insulation material; 5-cooling fluid inlet header; 6-cooling fluid entrance sleeve; The 7-glass cover-plate; 8-glass side seal; The 9-circular aperture; The 10-solar photovoltaic cell panel; The 11-metal fin; 12-cooling channels base plate; The plate heat pipe evaporation ends of 13-; The 14-wick; The plate heat pipe condensation end of 15-; The 16-radiating fin; The 17-vacuum cavity; The 18-cooling channels; 19-cooling channels side seal.
Embodiment:
Below in conjunction with the Fig. 1 in the Figure of description, Fig. 2, Fig. 3 concrete enforcement of the utility model is elaborated.
The utility model mainly is made up of solar-energy photo-voltaic cell module 1, solar photovoltaic cell panel 10, glass cover-plate 7, glass side seal 8, plate heat pipe evaporation ends 13, plate heat pipe condensation end 15, insulation material 4, cooling channels 18, cooling channels base plate 12, cooling channels side seal 19, cooling fluid inlet header 5, cooling fluid outlet header 2, cooling fluid entrance sleeve 6 and cooling fluid discharge connection 3.Plate heat pipe evaporation ends 13 closely contacts with solar photovoltaic cell panel 10; Outside plate heat pipe outer surface and cooling channels side seal 19 and cooling channels base plate 12, be provided with insulation material 4; Solar photovoltaic cell panel 10 upper surfaces are provided with and are the solar-energy photo-voltaic cell module 1 that regular rectangular shape is arranged; Between plate heat pipe evaporation ends 13 peaceful plate shaped heat pipe condensation ends 15, be provided with enclosed vacuum cavity 17, be provided with parallel metal fin 11 in the vacuum cavity and be connected between plate heat pipe evaporation ends 13 and the plate heat pipe condensation end 15; On metal fin 11, be provided with regularly arranged circular aperture 9; In the cooling channels 18 of plate heat pipe condensation end 15, the radiating fin parallel with fluid flow direction 16 is housed; Metal fin 11 surfaces in plate heat pipe and vacuum cavity 17 inner surfaces are equipped with the wick 14 of working medium backflow for liquid; In enclosed vacuum cavity 17, liquid working substance is housed; Whole device tiltable is provided with.
The course of work of the present utility model is as follows:
When solar radiation shines glass cover-plate 7 on photovoltaic electricity-thermal conversion device, solar energy sees through glass cover-plate 7 and enters the enclosure space of being made up of glass cover-plate 7 and glass side seal 8, utilize the greenhouse effect of enclosure space, the solar energy that enters enclosure space is absorbed by solar-energy photo-voltaic cell module 1 on the one hand and converts electric energy to, the heating solar photovoltaic battery panel 10 on the other hand, and some heat scatters and disappears in the mode of convection current and radiation by glass cover-plate 7 and glass side seal 8 simultaneously; After solar photovoltaic cell panel 10 was heated, heat was passed to plate heat pipe evaporation ends 13 in the mode of heat conduction by solar photovoltaic cell panel 10; At plate heat pipe evaporation ends 13, the liquid working substance of plate heat pipe heat absorption vaporization, each the little vacuum cavity by interconnecting in the vacuum cavity 17 of the working medium after the vaporization moves to plate heat pipe condensation end 15; At plate heat pipe condensation end 15, the working medium of gaseous state condenses into liquid working medium after giving cooling fluid in the outer cooling channels 18 of plate heat pipe condensation end 15 heat release, liquid working medium is under wick 14 effects on plate heat pipe inner surface and metal fin 11 surfaces, be back to plate heat pipe evaporation ends 13, heat absorption vaporization again; And cooling fluid enters cooling fluid inlet header 5 back inflow cooling channels 18 by cooling fluid entrance sleeve 6; Under the augmentation of heat transfer effect of the radiating fin 16 in cooling channels 18, cooling fluid absorbs heat from plate heat pipe condensation end 15 in the mode of heat convection, flows out through cooling fluid discharge connection 3 by cooling fluid outlet header 2 after reaching desired temperature.