JP2011243740A - Solar cell with flow passage, solar cell panel and photovoltaic power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell having a heat exchanger structure which achieves cooling with simple and inexpensive constitution.SOLUTION: A solar cell 1 with a flow passage includes a solar cell 2 and a refrigerant flow passage 6 formed on a cell reverse surface 2b, and a part of a flow passage inner peripheral surface of the refrigerant flow passage 6 is defined by the cell reverse surface 2b. A refrigerant flowing in the refrigerant flow passage 6 and the solar cell 2 exchange heat with each other directly through the cell reverse surface 2b. The heat exchange is carried out efficiently as compared with heat exchange between a solar cell and a refrigerant through a member with high heat conductivity such as a metal plate. The heat conductive plate such as the metal plate need not be stuck on the cell reverse surface of the solar cell, so there is no risk of damage such as a crack on the side of the solar cell due to a difference in coefficient of thermal expansion between a heat conductive plate, and a semiconductor substrate such as a silicon substrate constituting the solar cell etc. The heat conductive plate need not be used, so an inexpensive cooling mechanism is structured.

Description

  The present invention relates to a solar cell with a flow path, a solar battery panel, and a solar power generation system provided with a cooling coolant flow path so as to maintain power generation efficiency.

  It is known that solar cells, particularly those using crystalline cells, have a high temperature dependency of power generation efficiency, and the power generation efficiency decreases as the temperature increases. For example, in a silicon crystal cell, the power generation efficiency decreases by about 0.4% every time the temperature rises by 1 ° C. For this reason, when the cell temperature rises to, for example, about 80 ° C. in summer daytime, the power generation efficiency is reduced by 20% compared to the room temperature state. For this reason, there is a problem that the power generation efficiency in the summer when large electric power should be obtained is poor.

  Therefore, conventionally, solar cells are cooled to suppress a decrease in power generation efficiency due to high temperatures. As a cooling method, as disclosed in Patent Document 1, there is known a method of cooling by spraying solar cells installed on the roof of a building or the like. This method has a problem that water as a refrigerant is wasted and the heat generated by solar cells cannot be effectively used.

  Patent Literatures 2 to 4 disclose cooling methods that can solve such problems. Patent Document 2 discloses a cooling device that performs cooling by circulating a refrigerant through solar cells. Patent Document 3 discloses a method of cooling by attaching a heat pipe to the back surface of a solar battery cell. Patent Document 4 discloses a method of cooling by attaching a heat sink made of a metal plate to the back surface of a solar battery cell.

JP 2004-259797 A JP-A-10-201268 JP 2001-156323 A JP 2009-283640 A

  Here, in the cooling methods disclosed in Patent Documents 2 to 4, a metal plate having high thermal conductivity is attached to the back surface of the solar battery cell made of a semiconductor substrate, and heat dissipation or heat exchange with the refrigerant is performed via the metal plate. ing. However, since the thermal expansion coefficient differs greatly between a solar cell made of a semiconductor substrate and a metal plate having high thermal conductivity, a large stress is generated due to the difference in thermal expansion coefficient, and the solar cell with low mechanical strength. There is a risk of adverse effects on the side of the product, shortening the service life, or causing damage.

  For this reason, in Patent Document 4, a heat sink made of a metal material having a small difference in thermal expansion coefficient is bonded and fixed to the back surface of the solar battery cell. However, in such a method, the material cost increases, and since it is attached via an adhesive, the heat conduction efficiency is lowered, and sufficient cooling performance may not be ensured.

  On the other hand, in the case of using a heat pipe, in addition to the problem of thermal expansion difference, the internal pressure of the pipe increases significantly as the refrigerant evaporates due to heat exchange, so use a metal material with high mechanical strength for the heat pipe. It must be manufactured to withstand high pressures. For this reason, there exists a problem that manufacturing cost is high. For these reasons, solar cells with a cooling mechanism have not been put into practical use.

  In view of this point, an object of the present invention is to propose a solar battery cell having a structure that can be efficiently cooled with a simple and inexpensive configuration. Another object of the present invention is to propose a solar battery panel and a solar power generation system having a configuration in which the solar battery cells are arranged.

In order to solve the above problems, the solar battery cell of the present invention is
Solar cells,
A refrigerant flow path formed on the back surface of the cell opposite to the cell surface on the light incident side of the solar cell,
A part of the inner peripheral surface of the coolant channel is defined by the cell back surface.

  In this invention, a part of refrigerant flow path is formed using the cell back surface of a photovoltaic cell. Therefore, heat exchange between the refrigerant flowing through the refrigerant flow path and the solar battery cell is directly performed via the cell back surface. Therefore, heat exchange can be performed more efficiently than in the conventional case where heat exchange is performed between the solar battery cell and the refrigerant via a member having high thermal conductivity such as a metal plate. In addition, since there is no need to attach a heat conductive plate such as a metal plate to the back surface of the solar cell, the thermal expansion coefficient between the heat conductive plate and the semiconductor substrate such as a silicon substrate constituting the solar cell There is no risk of damage such as cracks occurring on the solar cell side due to the difference. Furthermore, since it is not necessary to use a heat conducting plate, it is advantageous to construct an inexpensive cooling mechanism.

  Here, a pair of refrigerant flow ports may be formed in the refrigerant flow path for inflow and discharge of the refrigerant.

  Further, a flow path forming member is fixed to the cell back surface of the solar battery cell by bonding or the like, and the refrigerant flow path communicating with the refrigerant flow port is formed between the cell back surface and the flow path forming member. be able to.

  In this case, the flow path forming member includes a frame plate having a predetermined shape fixed to the cell back surface, and a sealing plate sealing the end surface of the frame plate opposite to the end surface on the cell back surface side. It can be configured. Specifically, the frame plate is partitioned so that a loop-shaped outer peripheral frame plate portion and a gap between the cell back surface and the sealing plate surrounded by the outer peripheral frame plate portion become a continuous channel having a predetermined shape. It can be set as the structure provided with the partition plate part which has.

  Here, a back electrode or the like may be exposed on the cell back surface of the solar battery cell. In such a case, it is desirable to form the flow path forming member from a non-conductive material or an insulating material. Since the refrigerant is generally insulative, there is no problem even if electrodes, wiring, etc. are exposed on the back surface of the cell by forming the flow path forming member from an insulating material.

  Further, from the viewpoint of ease of manufacture, easy adhesion, etc., it is desirable that the flow path forming member is a resin molded product.

  Next, the solar battery panel of the present invention is configured by arranging a plurality of solar cells with flow paths having the above-described configuration, and the refrigerant is passed through each of the refrigerant flow paths of the solar battery cells. It has a refrigerant circulation path to circulate.

  In the solar cell panel of the present invention, since each solar cell is efficiently cooled, the temperature rise of the solar cell can be suppressed even in summer and the like, and the decrease in power generation efficiency can be suppressed.

  On the other hand, the photovoltaic power generation system of the present invention has a solar cell panel having the above-described configuration and a cooling device that exchanges heat with the solar cells by circulating the refrigerant through the refrigerant circulation path. It is characterized by that.

  Here, since a part of the refrigerant flow path of each solar battery cell is formed by the cell back surface of the solar battery cell, when the pressure of the refrigerant flowing through the refrigerant flow path is high as in a general heat pipe, There is a risk of damage such as cracking in the battery cell. Further, when the flow path forming member is made of resin, there is a possibility that damage is generated not only in the solar battery cells but also in the flow path forming member.

  Thus, in the present invention, since the refrigerant flow path is formed of a material that cannot withstand high pressure, the cooling device includes a pressure adjustment mechanism that maintains the internal pressure of the refrigerant flow path below a preset pressure. It is desirable to have it. In particular, it is desirable that the pressure adjusting mechanism can maintain the internal pressure of the fluid flow path at atmospheric pressure.

  In the present invention, a normal pressure heat pipe capable of maintaining the internal pressure at a normal pressure can be used as the cooling device. The normal pressure heat pipe includes a heat source side heat exchanger for heat absorption, a heat source side heat exchanger for heat dissipation, the refrigerant circulation path for always circulating the refrigerant in the same direction via these, and the refrigerant circulation It is attached to the circulation path part that guides the refrigerant after radiating heat through the cold heat source side heat exchanger in the channel to the hot heat source side heat exchanger, and the volume can be increased or decreased so that the internal pressure is balanced with the atmospheric pressure. It can be set as the structure provided with the refrigerant | coolant pool. In this case, the fluid flow path in each of the solar cells is a part that functions as the hot-side heat exchanger.

  In this case, it is desirable that the refrigerant circuit includes a backflow prevention valve for preventing the refrigerant from flowing back. In particular, it is desirable that the refrigerant circulation path be provided with a circulation pump for circulating the refrigerant in the same direction instead of or together with the backflow prevention valve.

  Next, in the photovoltaic power generation system of the present invention, it is possible to construct a system for obtaining hot water using heat recovered from the solar cell panel. That is, it is possible to provide a hot water device that circulates water that performs heat exchange with the refrigerant in the cold heat source side heat exchanger to obtain hot water at a predetermined temperature.

  In the present invention, in order to cool the solar battery cell, a part of the refrigerant flow path is formed using the cell back surface of the solar battery, and between the refrigerant flowing through the refrigerant flow path and the solar battery cell. The heat exchange is performed directly through the back surface of the cell. Unlike the conventional case where heat exchange between the solar cell and the refrigerant is performed through a member having high thermal conductivity such as a metal plate, the heat conductive plate such as a metal plate is attached to the solar cell. Since there is no need to stick to the back of the cell, cracks on the side of the solar cell due to the difference in the coefficient of thermal expansion between the heat transfer plate and the semiconductor substrate such as the silicon substrate constituting the solar cell There is no risk of damage. Moreover, since it is not necessary to use a heat conductive plate, an inexpensive and practical cooling mechanism that can be integrally formed with the solar battery cell can be constructed.

It is a perspective view which shows embodiment of the photovoltaic cell with a flow path to which this invention is applied. It is a disassembled perspective view of the photovoltaic cell of FIG. It is explanatory drawing which shows the solar cell panel comprised by arranging the photovoltaic cell of FIG. 1 vertically and horizontally. It is explanatory drawing which shows embodiment of the heat pipe for solar cell panel cooling to which this invention is applied, and a solar cell panel shows the state at the time of low temperature. It is explanatory drawing which shows the heat pipe of FIG. 4, and a solar cell panel shows the state at the time of high temperature. It is explanatory drawing which shows embodiment of the heat pipe for solar cell panel cooling provided with the circulation pump to which this invention is applied. It is explanatory drawing which shows embodiment of the solar energy power generation system to which this invention is applied.

  Hereinafter, embodiments of a solar battery cell, a solar battery panel, and a solar power generation system to which the present invention is applied will be described with reference to the drawings.

(Solar cell)
FIG. 1 is a perspective view showing a solar cell with a flow channel to which the present invention is applied, and FIG. 2 is an exploded perspective view thereof. The solar cell with flow path 1 includes a solar battery cell 2 and a flow path forming plate 3 attached to a cell back surface 2b (cell substrate back surface) opposite to the light incident side cell surface 2a of the solar battery cell. It has. Between the solar battery cell 2 and the flow path forming plate 3, a refrigerant flow path 6 for circulating a refrigerant for cooling the solar battery cell 2 is formed. In addition, the arrow of FIG. 1 shows the flow of a refrigerant | coolant.

  The solar battery cell 2 is, for example, a rectangular plate having a certain thickness, and has a photoelectric conversion element built in a semiconductor substrate such as silicon. The specific structure is known and will not be described. The outline shape of the photovoltaic cell 2 is not limited to a rectangular outline. Moreover, although the photovoltaic cell 2 is a flat thing, it can also be made into a curved thing.

  The flow path forming plate 3 affixed to the cell back surface 2b of the solar battery cell 2 is made of, for example, an insulating resin material, and has a coefficient of thermal expansion that is substantially the same as the cell substrate of the solar battery cell 2. ing. It is also possible to form an insulating material other than resin, for example, ceramic. In this case, it is desirable to use a material having a thermal expansion coefficient equal to or close to that of the cell substrate.

  The flow path forming plate 3 includes a frame plate 4 having a rectangular outline, and a rectangular blocking plate 5 attached to the frame plate 4. The frame plate 4 is a frame plate having a constant width and thickness with a rectangular outline that is slightly smaller than the cell back surface 2b. The frame end surface 4a on the cell back surface side is attached to the cell back surface 2b with an adhesive or the like. . The rectangular blocking plate 5 has the same rectangular outline as the frame plate 4, and is attached to the frame end surface 4 b on the opposite side of the cell back surface 2 b in the frame plate 4. The rectangular blocking plate 5 may be in the form of a film, for example, a material that can be bent in an out-of-plane direction. The shape of the frame plate 4 may be a shape other than a rectangle, and may not be similar to the shape of the cell back surface 2b. In addition, the frame plate 4 and the rectangular blocking plate 5 are formed as separate members and bonded and fixed to each other. However, it is also possible to mold these as a single body.

  The frame plate 4 includes an outer peripheral frame plate portion 4A having a rectangular outline and two partition plate portions 4B and 4C extending inward from the inner side surface of the outer peripheral frame plate portion 4A. The partition plate portions 4B and 4C extend from the pair of opposed inner side surfaces 4c and 4d in the outer peripheral frame plate portion 4A at a constant interval in a direction orthogonal to each other. The outer peripheral frame plate portion 4A can have a loop shape other than a rectangle. Of course, the partition plate portions 4B and 4C may not be linear, and are not limited to two, and may be three or more.

  In a state where the frame plate 4 is attached to the cell back surface 2b of the solar battery cell 2 and the rectangular blocking plate 5 is attached to the frame plate 4, a refrigerant channel 6 having a constant width and a constant thickness is formed therebetween. The That is, the inner peripheral side surface of the refrigerant flow path 6 is defined by the frame plate 4, one inner end face of the refrigerant flow path 6 is defined by the cell back surface 2 b, and the other inner end face of the refrigerant flow path 6 is the rectangular sealing plate 5. It is defined by the inner surface 5a.

  Refrigerant circulation ports 7 a and 7 b are attached to the outer surface 5 b of the rectangular blocking plate 5 at a pair of corner portions. The refrigerant circulation ports 7 a and 7 b are, for example, resin cylinders, and communicate with the refrigerant flow path 6. The refrigerant circulation ports 7 a and 7 b are bonded and fixed to the rectangular blocking plate 5, but they can be integrally formed with the rectangular blocking plate 5. One of the refrigerant circulation ports 7 a and 7 b functions as a refrigerant inlet, through which the refrigerant flows into the refrigerant flow path 6, and the other of the refrigerant flow holes 7 a and 7 b functions as a refrigerant outlet and passes through the refrigerant flow path 6. After that, the refrigerant is discharged outside through this.

  In the solar cell 1 with a flow path configured as described above, a heat exchanger structure is formed in itself, and a part of the refrigerant flow path 6 is formed by the cell back surface 2b. Therefore, a highly efficient heat exchanger using solar heat as a heat source can be realized at low cost. Therefore, since the photovoltaic cell 2 can be cooled efficiently, the fall of the power generation efficiency accompanying the high temperature of the photovoltaic cell 2 can be suppressed also in the state which received the strong sunlight.

(Solar panel)
FIG. 3 is an explanatory view showing an example of a solar cell panel. The solar cell panel 10 is configured by electrically connecting a large number of solar cells 1 with flow passages in series or in parallel. For example, four rows of four solar cells 1 with flow paths arranged in series are formed. Further, in the four solar cells 1 with flow paths in each row, the refrigerant flow ports 7 a and 7 b are connected to each other by the communication pipe 11 between the adjacent solar cells 1 with flow paths. The refrigerant flow path 6 of the solar cell with flow path 1 located on both sides of each row communicates with the refrigerant circulation pipes 12 and 13 of the cooling device (not shown) via the communication pipe 11 to circulate the refrigerant. The pipes 12 and 13 communicate with the refrigerant supply source side. Therefore, the refrigerant flow path of the solar cell 1 with each flow path is constituted by the communication pipe 11 that connects the refrigerant flow paths 6 of the solar battery cells 1 with flow paths in series and the refrigerant circulation pipes 12 and 13 on both sides. A refrigerant circulation path for circulating the refrigerant through 6 is configured.

  Here, a part of the refrigerant channel 6 is defined by the cell substrate back surface of the solar cell 1 with a channel, and the cell substrate cannot withstand high pressure. Therefore, as a cooling device that performs heat exchange with the solar cells 1 with each flow path by circulating the refrigerant through the refrigerant circulation paths (11, 12, 13), the internal pressure of the refrigerant flow path 6 is It is desirable to provide a pressure adjustment mechanism that can be maintained at a pressure equal to or lower than a preset pressure, for example, atmospheric pressure.

(Normal pressure heat pipe)
4 and 5 are explanatory views showing an example of a solar power generation system including the solar cell panel and the cooling device having the above-described configuration. The cooling device of the solar power generation system 30A is an atmospheric pressure heat pipe 20 that can circulate the refrigerant in an atmospheric pressure state. The normal pressure heat pipe 20 includes a heat source side heat exchanger 21 for heat absorption, a heat source side heat exchanger 22 for heat dissipation, and a refrigerant circulation path 23 that always circulates the refrigerant in the same direction via these. I have. The refrigerant circulation path 23 absorbs heat at the supply-side circulation path portion 23 a that guides the refrigerant after radiating heat through the cold-heat source-side heat exchanger 22 to the warm-heat source-side heat exchanger 21, and the heat-source-side heat exchanger 21. And a recovery-side circuit portion 23b that guides the refrigerant to the cold heat source-side heat exchanger 22.

  The supply-side circulation path portion 23a is formed with a communication portion 23c that communicates with a refrigerant reservoir 24 whose volume can be increased or decreased so as to balance with the atmospheric pressure. A backflow prevention valve 25 for preventing the backflow of the refrigerant is disposed on the downstream side of the communication portion 23c. The refrigerant reservoir 24 includes a variable volume bag 24a made of a bellows-like flexible material. For example, the variable volume bag 24a is formed from rubber or flexible resin. Since the internal pressure acts on the variable volume bag 24a via the communication portion 23c and the outer peripheral side thereof is exposed to the atmospheric pressure, when the internal pressure rises above the atmospheric pressure, the volume variable bag 24a spreads and the internal pressure is increased to the atmospheric pressure. Acts to maintain.

  Here, the heat source side heat exchanger 21 is the refrigerant flow path 6 of each solar cell 1 with each flow path of the solar battery panel 10 shown in FIG. 3, and the heat generated in each solar cell 1 with flow path is Absorbed by the refrigerant.

  The operation of the atmospheric pressure heat pipe 20 having this configuration will be described. The atmospheric pressure heat pipe 20 is filled with a refrigerant liquid. Due to the heat generated by the photoelectric conversion operation of the solar cell 1 with each flow path of the solar battery panel 10, the refrigerant liquid in the heat source side heat exchanger 21, that is, within the refrigerant flow path 6 of the solar cell 1 with each flow path. The refrigerant liquid is warmed. When the refrigerant liquid temperature rises, the volume of refrigerant liquid increased by the thermal expansion is pushed out from the heat exchanger (refrigerant flow path 6).

  Since the backflow prevention valve 25 for restricting the flow of the refrigerant liquid in one direction is arranged in the refrigerant circulation path 23, a one-way flow of the refrigerant is formed when the refrigerant is warmed. Further, although the internal pressure increases due to the thermal expansion of the refrigerant, the volume variable bag 24a of the refrigerant reservoir 24 also expands from the initial volume V1. As a result, an equilibrium state with the atmospheric pressure is maintained, and the internal pressure of the refrigerant circulation path 23 is suppressed from rising and maintained at the atmospheric pressure state.

  As shown in FIG. 5, when the refrigerant absorbs a larger amount of heat in the heat exchanger (refrigerant channel 6), vaporization of the refrigerant occurs in the heat exchanger. At this time, the volume of the refrigerant in the heat pipe becomes very large, but volume expansion is suppressed by liquefying the refrigerant by heat radiation on the cold heat source side heat exchanger 22 side. By appropriately setting the volume change amount (volume V2-volume V1) of the refrigerant reservoir 24, the internal pressure can be maintained at the atmospheric pressure even at the high temperature shown in FIG. 5 as at the low temperature shown in FIG. Can do.

(Another example of atmospheric pressure heat pipe)
FIG. 6 is an explanatory diagram showing an example of a photovoltaic power generation system including an atmospheric pressure heat pipe in which a circulation pump 26 is arranged instead of the backflow prevention valve 25. Since the atmospheric pressure heat pipe 20A of the photovoltaic power generation system 30B shown in this figure is the same as the atmospheric pressure heat pipe 20 shown in FIGS. 4 and 5 except that the circulation pump 26 is arranged, the corresponding parts have the same reference numerals. The description is omitted. In the normal pressure heat pipe 20 </ b> A, the amount of heat exchange can be increased by actively circulating the refrigerant by the circulation pump 26. In addition, in the normal pressure heat pipe 20 shown in FIGS. 4 and 5, it is necessary to install the heat source side heat exchanger 21 at a high position and to arrange the cold heat source side heat exchanger 22 on the lower side, By using the pump 26, there is no restriction on the positional relationship of the heat exchanger.

  As described above, in the normal pressure heat pipes 20 and 20A, the refrigerant circulates in a normal pressure (atmospheric pressure) state, so that it can be manufactured at an extremely low cost as compared with a normal heat pipe. That is, in a normal heat pipe, it is necessary to make a strong structure using a strong metal material, but in the normal pressure heat pipes 20 and 20A of this example, it is not necessary to use a high-pressure specification, so that a mechanical material such as a resin is used. It can be manufactured at low cost using a low-strength material. Further, in the heat-side heat exchanger 21, a part of the refrigerant flow path 6 is formed by the cell back surface 2b of the solar battery cell 2. If the internal pressure of the refrigerant flow path 6 is high, the cell substrate is damaged. Although there is a risk of occurrence, such adverse effects can be reliably avoided by using the atmospheric pressure heat pipes 20 and 20A of this example.

  In addition, the atmospheric pressure heat pipes 20 and 20 </ b> A in FIGS. 4 to 6 are examples used as a cooling device for cooling the solar cell 1 with a flow path. It goes without saying that the atmospheric pressure heat pipes 20 and 20A of this example can be used to cool a cooling object other than the solar cell with flow path.

(Solar power system)
FIG. 7 is an explanatory diagram illustrating an example of a solar power generation system including a hot water device. The solar power generation system 30C includes the solar cell panel 10 shown in FIG. 3, the atmospheric pressure heat pipe 20 </ b> A shown in FIG. 6 attached to cool the solar battery panel 10, and the hot water device 40.

  The hot water device 40 includes a water supply pipe 41 for flowing tap water through the cold heat source side heat exchanger 22 of the atmospheric pressure heat pipe 20A, an on-off valve 42 attached to the upstream end side of the water supply pipe 41, and a cold heat source side heat exchange. And a hot water tank 43 for storing tap water heated by heat exchange in the vessel 22. The tap water supplied to the water supply pipe 41 is, for example, 5 ° C. to 15 ° C., and the tap water is heated to about 35 ° C. to 45 ° C. and stored in the hot water tank 43 by using solar heat by the solar battery panel 10. The hot water in the hot water tank 43 can be used by further heating, for example.

DESCRIPTION OF SYMBOLS 1 Solar cell 2 with a flow path Solar cell 2a Cell surface 2b Cell back surface 3 Flow path formation board 4 Frame plate 4a, 4b Frame end surface 4c, 4d Inner side surface 4A Outer peripheral frame plate part 4B, 4C Partition plate part 5 Rectangular sealing board 5a Inner surface 5b Outer surface 6 Refrigerant flow path 7a, 7b Refrigerant flow port 10 Solar panel 11 Communication pipe 12, 13 Refrigerant circulation pipe 20, 20A Normal pressure heat pipe 21 Heat source side heat exchanger 22 Cold heat source side heat exchanger 23 Refrigerant circulation path 23a Supply-side circulation path part 23b Recovery-side circulation path part 23c Communication part 24 Refrigerant pool 24a Volume variable bag 25 Backflow prevention valve 26 Circulation pumps 30A, 30B, 30C Photovoltaic power generation system 40 Hot water device 41 Water supply pipe 42 Open / close Valve 43 Hot water tank

Claims (15)

Solar cell (2),
A refrigerant flow path (6) formed on the cell back surface (2b) opposite to the light incident side cell surface (2a) of the solar battery cell (2);
Part of the inner peripheral surface of the flow path of the refrigerant flow path (6) is defined by the cell back surface (2b), and the solar cell with flow path (1). In claim 1,
The solar cell (1) with a flow path, wherein the refrigerant flow path (6) includes a pair of refrigerant flow ports (7a, 7b). In claim 2,
Having a flow path forming member (3) fixed to the cell back surface (2b);
The flow path characterized in that the refrigerant flow path (6) communicating with the refrigerant flow port (7a, 7b) is formed between the cell back surface (2b) and the flow path forming member (3). A solar battery cell (1). In claim 3,
The flow path forming member (3) includes a frame plate (4) having a predetermined shape fixed to the cell back surface (2b), and an end surface (4b) opposite to the cell back surface end surface of the frame plate (4). And a blocking plate (5) sealing the solar cell with a flow path (1). In claim 4,
The frame plate (4) continuously forms a loop-shaped outer peripheral frame plate portion (4A) and a gap between the cell back surface (2b) and the sealing plate (5) surrounded by the outer peripheral frame plate portion (4A). A solar cell (1) with a flow path, comprising a partition plate portion (4B, 4C) that partitions the flow path to have a predetermined shape. In claim 3, 4 or 5,
The solar cell (1) with a flow path, wherein the flow path forming member (3) is made of an insulating material. In any one of claims 3 to 6,
The solar cell (1) with a flow path, wherein the flow path forming member (3) is a resin molded product. A solar cell panel (10) configured by arranging a plurality of solar cells,
The solar battery cell is a solar battery cell with a flow path (1) according to any one of claims 2 to 7,
It has a refrigerant circulation path (11, 12, 13) which circulates a refrigerant | coolant via each said refrigerant | coolant flow path (6) of the said photovoltaic cell (1) with said flow path. Panel (10). A solar cell panel (10) according to claim 8;
A cooling device (20, 20A) for exchanging heat with the solar cell (1) with the flow path by circulating the refrigerant through the refrigerant circulation path (11, 12, 13). A solar power generation system (30A, 30B, 30C) characterized by In claim 9,
The cooling device (20, 20A) includes a pressure adjusting mechanism (24) that maintains an internal pressure of the refrigerant flow path (6) below a preset pressure. 30B, 30C). In claim 10,
The solar power generation system (30A, 30B, 30C), wherein the pressure adjustment mechanism (24) maintains an internal pressure of the fluid flow path at an atmospheric pressure. In claim 11,
The cooling device is an atmospheric pressure heat pipe, and the atmospheric pressure heat pipe (20, 20A)
A heat source side heat exchanger (21) for heat absorption;
A heat source side heat exchanger (22) for heat radiation;
The refrigerant circulation path (23) for always circulating the refrigerant in the same direction via these,
The refrigerant circuit (23) is attached to a circuit part (23a) that guides the refrigerant after radiating heat through the cold heat source side heat exchanger (22) to the heat source side heat exchanger (21). A refrigerant reservoir (24) whose volume can be increased or decreased so as to equilibrate with atmospheric pressure,
The solar power generation system (30A, 30B, 30C), wherein the heat-side heat exchanger (21) is the refrigerant flow path (6) in each of the solar cells with flow paths (1). In claim 12,
The solar power generation system (30A), wherein the refrigerant circulation path (23) includes a backflow prevention valve (25) for preventing backflow of the refrigerant. In claim 12 or 13,
The solar power generation system (30B, 30C), wherein the refrigerant circulation path (23) includes a circulation pump (26) for circulating the refrigerant in the same direction. In any one of claims 11 to 14,
Sunlight characterized by having a hot water device (40) that circulates water that exchanges heat with the refrigerant in the cold heat source side heat exchanger (22) to obtain hot water at a predetermined temperature. Power generation system (30C).