JP2001311564A - Heat collector with solar cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat collector with a solar cell enabling improvement of the efficiency of heat collection. SOLUTION: The heat collector with the solar cell is formed by stacking a flat-plate-shaped solar cell module 3 and a heat collecting module 1. The heat collecting module 1 has a passage 25 of a heating medium demarcated by two plates 13 and 17 opposite to each other, and one plate 13 on the side facing the solar cell module 3 out of the plates 13 and 17 demarcating the passage 25 is formed in the shape of a flat plate substantially, while the other plate 17 is formed to be an almost corrugated plate having a plurality of grooves 15 extending in parallel. According to this constitution, the solar cell module 3 and the heat collecting module 1 can be connected together in a state of being in as close contact with each other as possible and the heat received by the flat-plate-shaped plate 13 on one side functioning as a heat receiving plate of the heat collecting module 1 can be conducted directly to the heating medium flowing through the passage 25. Therefore the efficiency of heat collection can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat collector with a solar cell, and more particularly to a heat collector with a solar cell that converts solar energy into electric energy and heat energy.

[0002]

2. Description of the Related Art A heat collector with a solar cell, that is, a hybrid panel, has a structure in which a solar cell module for converting solar energy into electric energy and a heat collecting module for converting heat energy into heat energy are stacked. . As described in JP-A-10-128570 and the like, a conventional heat collector with a solar cell includes a flat solar cell module, a flat heat receiving plate, and a heat medium tube through which a heat medium flows. And so on. The plate-shaped solar cell module and the plate-shaped heat receiving plate are attached in a state in which they are brought into close contact with an adhesive or the like as much as possible. On the surface opposite to the heat receiving surface of the heat receiving plate that receives the solar heat, a mounting member or an adhesive portion for mounting the heat transfer medium tube to the heat receiving plate is provided. The heat is transferred to the heat medium tube through the bonding portion.

[0003]

In such a conventional heat collector with a solar cell, as described above, the solar heat received by the heat receiving plate of the heat collecting module is applied to the heat medium tube via the mounting member and the bonding portion. Since the heat is transferred, the solar heat received by the heat receiving plate cannot be efficiently transmitted to the heat medium flowing through the heat medium pipe due to the loss of heat at the attachment member or the bonding portion, and the heat collection efficiency is not sufficient.

[0004] It is an object of the present invention to improve the heat collection efficiency of a heat collector with a solar cell.

[0005]

The heat collector with a solar cell according to the present invention is a heat collector with a solar cell in which a flat solar cell module and a heat collection module are stacked, and the heat collection modules are opposed to each other. It has a flow path defined by two plates, and, of the plates defining the flow path, one of the plates facing the solar cell module is formed to be substantially flat. Solves the above problem.

According to this structure, one of the heat collecting modules on the side facing the solar cell module is a heat receiving plate formed in a substantially flat plate shape, and the solar cell module and the heat collecting module are adhered as closely as possible. It can be connected in the state where it is made. Further, the heat received by one of the flat plates serving as the heat receiving plate of the heat collecting module can be directly transmitted to the heat medium flowing through the flow path defined by the one plate and the other plate. it can. Therefore, heat loss can be reduced, and the heat collection efficiency of the solar cell-equipped heat collector can be improved.

Further, if a light transmissive cover plate is provided on the light receiving surface side of the solar cell module at a distance from the solar cell module, air formed between the solar cell module and the cover plate is provided. The layer is preferable because heat radiated from the solar heat module or the like can be held and heat collection efficiency can be further improved.

Further, if the other plate of the heat collecting module is formed in a substantially waveform having a plurality of grooves extending in parallel, the heat medium easily flows along the grooves, so that the heat medium is efficiently used. And the heat collection efficiency can be further improved. Furthermore, it is preferable to weld the other plate to one plate at the peripheral edge and at least a part of the convex portion between the adjacent grooves of the other plate, because a heat collection module with improved heat collection efficiency can be easily formed. .

If the outer surface of one of the plates has been subjected to the selective absorption treatment, or if the selective absorption layer has been formed on the outer surface of the one plate, one of the plates efficiently absorbs the solar heat, and Since heat is hardly radiated from the heat collecting module to the outside, the heat collecting efficiency can be further improved, which is preferable.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a solar cell heat collector according to the present invention will be described below with reference to FIGS. FIG. 1 is a partial cross-sectional view showing a schematic configuration of a solar cell-equipped heat collector to which the present invention is applied. FIG.
FIG. 2 is a partially enlarged view showing a schematic configuration of a heat collection module to which the present invention is applied. FIG. 3 is a longitudinal sectional view showing a schematic configuration of a solar cell-mounted collector to which the present invention is applied. FIG. 4 is a perspective view showing a schematic configuration of a solar cell-equipped heat collector to which the present invention is applied, in which a solar cell module is partially cut away.

As shown in FIG. 1, the heat collector with a solar cell of this embodiment, that is, the hybrid panel, comprises a heat collector module 1, a solar cell module 3, an air layer 5, a cover plate 7, a heat insulating material 9, and a frame. It is composed of a body 11 and the like.
The heat collecting module 1 is formed of two plates, and has a substantially flat plate 13 serving as a heat receiving plate, and a plurality of grooves 15 extending in parallel with the longitudinal direction of the heat collecting module 1 and substantially formed. The corrugated plate 17 is formed with a corrugated plate. Corrugated sheet 1
The convex portion 19 between the adjacent grooves 15 of 7 is in a state close to the flat plate 13. The convex portion 19 of the corrugated plate 17 and the convex portion 1
As shown in FIG. 2, the portion of the flat plate 13 facing 9
Seam welding is performed at the welds 21 which are partially scattered,
The heat collecting module 1 in which the heat receiving plate and the flow path 25 of the heat medium are integrated by seam welding at the welding portion 23 on the peripheral edge of the flat plate 13 and the corrugated plate 15 is formed.

As shown in FIGS. 2 and 3, the short ends of both ends of the heat collecting module 1 are continuous with the ends of the grooves 15 of the corrugated plate 17, and the corrugated plate 17 is brought close to the flat plate 13. A constricted portion 27 in which the interval between the flow paths 25 of the heat medium is narrow, a tubular header tube portion 29 that communicates with the flow channel 25 through the constricted portion 27 and extends in a direction substantially perpendicular to the groove 15, and the like. Are formed. The header tube portion 29 includes the flat plate 13 and the corrugated plate 1.
7 are formed by opposing grooves formed so as to extend in a direction substantially perpendicular to the grooves 15 of the corrugated plate 17. Although the flat plate 13 and the corrugated plate 17 of the present embodiment are formed by thin stainless steel plates, another metal material, for example, an aluminum plate or a copper plate can be used.
Further, in the heat collecting module 1 of the present embodiment, the outer surface of the flat plate 13, that is, the heat receiving surface is subjected to the selective absorption process. The selective absorption treatment is performed by, for example, an alkali black oxidation method proposed in Japanese Patent Application Laid-Open No. 55-6414. Further, in order to make the heat receiving surface of the flat plate 13 a selective absorption surface, various methods of forming a black nickel plating film on the surface or vapor-depositing a metal oxide can be used in addition to the selective absorption treatment.

As shown in FIGS. 1 and 3, the solar cell module 3 is made of a light-transmitting material such as a glass plate on the surface of the air layer 5 and has a substrate 31 serving as a light receiving surface of the solar cell module 3. A back film 33 made of a light-transmitting and insulating material on the surface of the heat module 1, for example, a polymer resin film or a thin glass plate, and arranged vertically and horizontally on a plane between the substrate 31 and the back film 33. A plurality of solar cells 35 and a light-transmitting resin material for sealing the plurality of solar cells 35 between the substrate 31 and the back film 33, for example, a resin layer 37 made of EVA (ethylene vinyl acetate) or the like. It is configured.

The hybrid panel of this embodiment having such a heat collection module 1 and a solar cell module 3 is integrally formed in a frame 11 as shown in FIGS. 1, 3, and 4. The heat collecting module 1 is installed on a heat insulating material 9 made of, for example, urethane resin provided on the bottom of the frame 11, and the solar cell module 3 is stacked on the flat plate 13 of the heat collecting module 1. In this embodiment,
The solar cell module 3 is a flat plate 13 of the heat collecting module 1.
And a back film 33 of the solar cell module 3 with a resin adhesive material, such as EV, which transmits light and buffers the difference in linear expansion coefficient between the heat collection module 1 and the solar cell module 3.
It is fixed to the heat collecting module 1 by bonding with A or the like. Further, between the flat plate 13 of the heat collection module 1 and the back film 33 of the solar cell module 3, light transmittance is used to buffer the difference in linear expansion coefficient between the heat collection module 1 and the solar cell module 3, not shown. The heat collecting module 1 and the solar cell module 3 may be connected by sandwiching a buffer film or the like and fixing the peripheral portions of the heat collecting module 1 and the solar cell module 3 with bolts or clamps (not shown). . At this time, it is desirable that the buffer layer is made of a material having high thermal conductivity, but when the thermal conductivity is low, the thickness is reduced to such an extent that the buffer capacity is not lost.
What is necessary is just to reduce the heat loss.

The operation of the hybrid panel having such a configuration and the features of the present invention will be described. That is, in the hybrid panel of the present embodiment, the solar cell module 3 converts sunlight into electricity,
The heat of the air heated by the solar heat inside, the heat of the solar cell module 3 heated by receiving the solar heat, and the like pass directly from the flat plate 13 as the heat receiving plate of the heat collecting module 1 through the flow path 25 of the heat collecting module 1. The heat is transferred to the flowing heat medium and collected.
At this time, the heat medium flows into the flow channel 25 from one header pipe portion 29 of the heat collection module 1 and passes through the flow channel 25 toward the other header pipe portion 29 along the groove 15 of the corrugated plate 17. During the flow, the temperature rises due to heat exchange, and flows out of the other header tube portion 29. The heat exchange cools the solar cell module 3.

As described above, in the heat collector with a solar cell of this embodiment, that is, in the hybrid panel, the heat collecting module 1 and the solar cell module 3 are connected to the heat receiving surface of the flat plate 13 of the heat collecting module 1 and the back of the solar cell module 3. The film 33 can be connected with the film 33 as closely as possible. Further, the heat received by the flat plate 13 as the heat receiving plate of the heat collecting module 1 is directly transmitted to the heat medium flowing through the flow path 25 of the heat collecting module 1. Therefore, unlike the conventional hybrid panel, there is no heat loss generated during the transfer of heat from the heat receiving plate to the heat medium pipe. Therefore, the loss of the heat transmitted from the flat plate 13 serving as the heat receiving plate to the heat medium can be reduced, and the heat collection efficiency can be improved.

When solar energy is recovered as electric energy or heat energy by the hybrid panel, the recovery rate as heat energy is higher than the recovery rate as electric energy. Therefore, to recover solar energy efficiently, the recovery rate of thermal energy,
That is, it is desirable to improve the heat collection efficiency. On the other hand, in the present embodiment, the heat collection efficiency can be improved, and further, the heat collection efficiency, that is, the heat exchange efficiency can be improved, so that the cooling efficiency of the solar cell module whose power generation efficiency is deteriorated due to the temperature rise can also be improved. . For this reason, the collection efficiency of solar energy of the hybrid panel can be improved.

Further, in this embodiment, a cover plate 7 is provided, and an air space 5 is provided between the cover plate 7 and the solar cell module.
Is formed, the heat radiated from the solar cell module 3 by the greenhouse effect is held in the air layer 5. For this reason, solar heat can be efficiently collected by the air layer 5, the radiation of heat from the hybrid panel can be reduced, and the heat collection efficiency can be further improved. However, a configuration without the cover plate 7 may be adopted.

Further, in this embodiment, the heat collecting module 1 has a flow path 25 formed between the flat plate 1 having a flat shape and the corrugated plate 17 having the groove 15 formed therein. For this reason, the heat medium easily flows in a rectified state along the groove 15 formed in the corrugated plate 17, and the temperature of the heat medium rises efficiently, so that the heat collection efficiency can be further improved. In addition, in the present embodiment,
Since the convex portions 19 between the adjacent grooves 15 of the corrugated plate 17 are close to the flat plate 1, the heat medium flowing between the adjacent grooves 15 is hardly mixed, and the heat medium is more efficiently warmed and the temperature rises.
However, the heat collecting module 1 can be formed by using a flat plate instead of using the corrugated plate 17 as the plate facing the flat plate 13. In this case, if it is necessary to rectify the heating medium,
Between the flat plate 13 and the flat plate facing the flat plate 13, both header pipes 2
A flow path may be formed by providing a partition or the like extending between the nine.

In this embodiment, the heat collecting module 1
Is seam-welded to the convex portion 19 of the corrugated plate 17 and the portion of the flat plate 13 opposed to the convex portion 19 at the welded portions 21 which are partially scattered. It is formed by seam welding at the welding portion 23. For this reason, the seam welding work of the heat collecting module 1 is reduced, and the heat collecting module 1 can be easily formed.

The solar thermal module generally has solar cells arranged vertically and horizontally on a plane. However, the solar thermal module has gaps between the solar cells and solar cells. If there is no part, the heat of the heat collecting module is radiated from this part and escapes. However, in the present embodiment, since the heat receiving surface of the flat plate 13 of the heat collecting module 1 is subjected to the selective absorption process, it is possible to sufficiently absorb solar energy and almost eliminate heat radiation. For this reason, even if there is a gap between the solar cells 35 of the solar cell module 3 or a part where the solar cells 35 are not arranged, heat is hardly radiated from the heat collection module 1. However, when there is no gap between the solar cells 35 in the solar cell module 3, the heat receiving surface of the flat plate 13 of the heat collection module 1 may be configured not to be subjected to the selective absorption process.

In the present embodiment, the header tube 29
Is formed as a flow path having a circular cross section by opposing grooves formed in the flat plate 13 and the corrugated plate 17 so as to extend in a direction substantially perpendicular to the groove 15 of the corrugated plate 17. However, as shown in FIG. 5, a header tube portion 39 having a semicircular cross section is formed by using a flat plate 13 having no groove extending in a direction substantially perpendicular to the groove 15 of the corrugated plate 17. Can also. In this case, since the solar cell module side of the header tube portion 39 is substantially flat, the solar cell module 3 can be mounted also on the header tube portion 39, and the light receiving area of the solar cell module 3 is increased to improve the power generation capacity. can do. Further, the present invention is not limited to the heat collector with a solar cell having the configuration of the present embodiment, but can be applied to a heat collector with a solar cell having various structures including at least a heat collecting module and a solar heat module.

[0023]

According to the present invention, the heat collection efficiency of the heat collector with a solar cell can be improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a schematic configuration of an embodiment of a heat collector with a solar cell to which the present invention is applied.

FIG. 2 is a partially enlarged view showing a schematic configuration of a heat collecting module of one embodiment of a heat collector with a solar cell to which the present invention is applied.

FIG. 3 is a partial vertical sectional view showing a schematic configuration of an embodiment of a solar cell-mounted collector to which the present invention is applied.

FIG. 4 is a perspective view showing a schematic configuration of an embodiment of a solar cell heat collector to which the present invention is applied, in which a solar cell module is partially cut away.

FIG. 5 is a partial cross-sectional view showing a schematic configuration of another embodiment of a heat collector with a solar cell to which the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat collection module 3 Solar cell module 5 Air layer 7 Cover plate 11 Frame 13 Flat plate 15 Groove 17 Corrugated plate 25 Flow path

Claims (5)

[Claims] 1. A heat collector with a solar cell in which a flat-plate solar cell module and a heat collecting module are stacked, wherein the heat collecting module has a flow of a heat medium defined by two opposing plates. A heat collector with a solar cell, characterized in that, of the plates defining the flow path, one of the plates facing the solar cell module has a substantially flat plate shape. 2. The solar cell according to claim 1, wherein a light-transmitting cover plate is disposed on the light receiving surface side of the solar cell module at a distance from the solar cell module. Attached heat collector. 3. The heat collector with a solar cell according to claim 1, wherein the other plate of the heat collector module is formed in a substantially waveform having a plurality of grooves extending in parallel. vessel. 4. The other plate is welded to the one plate at a peripheral portion and at least a part of a convex portion between the adjacent grooves of the other plate.
4. The collector with a solar cell according to any one of claims 3 to 3. 5. The method according to claim 1, wherein an outer surface of the one plate is subjected to a selective absorption treatment, or a selective absorption layer is formed on an outer surface of the one plate. 2. The heat collector with a solar cell according to claim 1.