JP5747949B2 - Solar heat and power supply panel - Google Patents

Description

  The present invention relates to a solar heat and power combined panel having a function of receiving sunlight and acquiring electricity and heat.

  As a prior art, for example, as described in Japanese Patent Application Laid-Open No. 2008-151490, a solar heat and power combined panel that acquires electricity and heat from sunlight is known. The solar heat and power supply panel has a power generation unit that receives sunlight to generate power, and collects solar heat absorbed by the power generation unit by circulating a heat medium mainly on the back side of the power generation unit. The recovered heat is consumed by air conditioning, hot water supply, and the like. The circulation path of the heat medium may be created using resin in order to reduce the cost.

  Such a conventional solar heat and power supply panel is disclosed, for example, in paragraph 0062 of Patent Document 1 as follows. “The heat collecting panel 91 is composed of a plate-shaped heat collector in which an upper plate 92 and a lower plate 93 are joined, and the upper plate 92 and / or the lower plate 93 has a groove 94 for circulating a heat medium. The upper plate 92 and the lower plate 93 are formed of, for example, a transparent reinforced plastic or the like.

JP 2008-151490 A

However, when creating a resin molded product, there are restrictions on the structure and shape necessary to easily separate the resin after molding from the mold, and in addition to the cost requirements, complicated shapes are required. It is difficult to integrally mold the molded product from the beginning. That is, at the time of resin molding of a complicated structure, a plurality of individual resin molded parts are often assembled by means such as adhesion and welding. As a result, for example, when resin is formed in the circulation path of the heat medium, it is necessary to provide a large number of coupling parts between the parts such as the header part and the joint part. Since such a joint has low heat resistance compared to other parts where the resin is continuous, when the resin component is brought into contact with the power generating part that is at a high temperature, the joint is not to be at a high temperature. Careful consideration is required.
However, in the conventional technique described in Patent Document 1, there is a problem in that no consideration is given to disposing the connecting portion of the resin component apart from a particularly high temperature portion of the power generation portion. For this reason, in the prior art, for example, the joint portion of the resin component is deteriorated by being exposed to high temperature in the header portion or the like, and there is a possibility that operation failure or failure may be induced by peeling of the joint portion.

  The present invention has been made to solve the above-described problems, and even when a resin structure is used as a heat recovery part for recovering heat from the power generation part, the joint part of the resin structure is not exposed to a high temperature. It aims at providing the solar heat / electric power supply panel which can arrange | position so that the reliability of a coupling | bond part can be improved.

  The solar heat and power combined panel according to the present invention has a plurality of solar cells that receive sunlight to generate power, and each of the solar cells is arranged in a plane with a space therebetween, and a heat medium A heat-recovering unit that is formed by joining a plurality of resin parts and is disposed along the back surface of the power generation unit. The connecting portions of the plurality of resin parts constituting the portion are arranged at intervals between the solar cells in a plan view when the plane on which the solar cells are arranged is viewed from the vertical direction.

  ADVANTAGE OF THE INVENTION According to this invention, the coupling | bond part of resin components can be separated from the center part of the back surface used as the highest temperature among photovoltaic cells, and a coupling | bond part can be protected from high temperature. Therefore, even when a resin structure is used as the heat recovery part, the connection part can be arranged so as not to be exposed to high temperature, and the reliability can be improved.

It is sectional drawing which shows the solar heat / electric power supply panel by Embodiment 1 of this invention. In Embodiment 1 of this invention, it is sectional drawing which shows the heat recovery part of a solar heat and power supply panel. In Embodiment 1 of this invention, the exploded view before assembling a heat recovery part and sectional drawing of each resin component are illustrated. In Embodiment 1 of this invention, it is explanatory drawing which shows the longitudinal cross-section of a solar heat and power supply panel, arrangement | positioning of a photovoltaic cell, and temperature distribution of the electric power generation part back surface. In Embodiment 1 of this invention, it is explanatory drawing which shows the positional relationship of the photovoltaic cell and the coupling | bond part of a resin component. In Embodiment 2 of this invention, it is sectional drawing and the exploded view which show the heat recovery part of a solar heat and power supply panel. In Embodiment 2 of this invention, it is explanatory drawing which shows the positional relationship of the photovoltaic cell and the coupling | bond part of a resin component. It is sectional drawing and the exploded view which show the heat recovery part of the solar heat and power combined supply panel by the modification of this invention.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. In each drawing used in this specification, common elements are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 is a cross-sectional view showing a solar heat and power combined panel according to Embodiment 1 of the present invention. The solar heat and power combined panel of the present embodiment has a transmission layer 1, an upper sealing layer 2, a power generation layer 3, a lower sealing layer 4 and an insulating layer 5 facing from the front side to the back side (from the upper side to the lower side). (Toward) are sequentially stacked. Moreover, the solar heat and power supply panel includes a heat recovery unit 6 attached in a state of surface contact with the back side of the insulating layer 5. Hereinafter, these components will be described.

  The transmission layer 1 is a transparent layer for protecting the power generation layer 3 from moisture, weight, leakage, etc., and is made of a material having rigidity and light transmission, such as glass. The upper sealing layer 2 is a transparent layer that protects the power generation layer 3 from moisture, electric leakage, and the like and absorbs thermal stress between the transmission layer 1 and the power generation layer 3. For example, a transparent resin such as EVA It is composed of an elastic body. The power generation layer 3 receives sunlight and generates power, and is configured by arranging a plurality of solar cells 3A in a flat plate shape. As a specific example, the solar cells 3A of the power generation layer 3 are formed, for example, in a rectangular tile shape, and are arranged in a lattice shape along two directions orthogonal to each other on a plane including the power generation layer 3. More specifically, each of the solar cells 3A is arranged in a plane with a predetermined size interval.

  The lower sealing layer 4 protects the power generation layer 3 from moisture and electric leakage and absorbs thermal stress between the power generation layer 3 and the insulating layer 5. The lower sealing layer 4 is made of, for example, a resin-based elastic body such as EVA, but transparency is not always necessary. The insulating layer 5 protects the power generation layer 3 from moisture and electric leakage in substantially the same manner as the lower sealing layer 4. The functions of the lower sealing layer 4 and the insulating layer 5 may be substituted by one layer. In the following description, the transmission layer 1, the upper sealing layer 2, the power generation layer 3, the lower sealing layer 4, and the insulating layer 5 are collectively defined as a “power generation unit”. The power generation unit has a configuration similar to that of an existing solar panel that performs only solar power generation without recovering heat, and may be configured to be integrally formed.

  The heat recovery unit 6 is a mechanism for recovering heat generated when solar power generation is performed by the power generation unit, and is formed of a resin material for the purpose of cost reduction or the like. The heat recovery unit 6 is formed as a hollow resin structure that extends in a substantially flat plate shape along the back surface of the power generation unit, and is configured to efficiently receive heat from each of the solar cells 3A. In addition, a flow path through which a heat medium such as water and brine flows is provided inside the heat recovery section 6, and an inlet 6A and an outlet through which the heat medium enters and exits are provided at the ends of the flow path. 6B is provided.

  Since the flow path in the heat recovery unit 6 has a complicated shape as described later, it is difficult to resin-mold the heat recovery unit 6 as a single component. For this reason, the heat recovery unit 6 is assembled by joining a plurality of resin parts by means such as adhesion and welding. When a plurality of solar heat and power supply panels are combined side by side, for example, the inlet 6A and the outlet 6B of adjacent panels are connected, and the heat recovery units 6 of the plurality of panels circulate the heat medium as a whole. A flow path is formed. Moreover, the piping which supplies the heat | fever collect | recovered from each panel with respect to heat demand apparatuses, such as an air conditioning apparatus and a hot water supply apparatus, for example is connected to the both ends of this circulation flow path.

  An elastic layer having a function of absorbing thermal stress and a function of reducing contact thermal resistance may be interposed between the back surface of the power generation unit and the heat recovery unit 6. For this elastic layer, for example, a resin material such as EVA or EPDM may be used. In addition, the elastic layer is not necessarily transparent, but if it is transparent, the inside can be inspected from the outside of the elastic layer, so that the maintainability is improved. Moreover, when it is judged that the back surface of the power generation unit and the surface of the heat recovery unit 6 are sufficiently flat and easy to adhere to each other, and that the thermal stress acting on the contact surface between the two is slight. The elastic layer may be omitted.

  Next, the operation of the solar heat and power combined panel will be described. First, during the daytime, the solar cells 3A of the power generation layer 3 receive sunlight to generate power. In addition, the solar cell 3A absorbs most of the solar energy, so that the temperature of the cell rises. For this reason, at the time of the operation of the solar heat and power supply panel, each solar cell 3A becomes the hottest portion in the panel, and heat is conducted and diffused from this portion toward the surrounding material.

  And the heat | fever discharge | released from each photovoltaic cell 3A is collect | recovered with the heat medium which flows through the inside of the heat recovery part 6. FIG. The heat recovered by the heat recovery unit 6 may be directly consumed if there is an immediate heat demand, but is generally temporarily stored in a hot water storage tank or the like. On the other hand, each solar cell 3 </ b> A is cooled by recovering heat from the heat recovery unit 6, so that the temperature of the cell decreases. Thereby, the power generation efficiency of each photovoltaic cell 3A improves, and the power generation amount of the power generation layer 3 increases.

  Next, with reference to FIG.2 and FIG.3, the structure of the heat recovery part 6 is demonstrated. FIG. 2 is a cross-sectional view showing a heat recovery part of the solar heat and power supply panel in Embodiment 1 of the present invention. More specifically, FIG. 2 (a) is a cross-sectional view in which the heat recovery unit 6 is broken along a plane parallel to the power generation layer 3 and the like, and FIG. 2 (b) shows the heat recovery unit 6 in FIG. It is the longitudinal cross-sectional view fractured | ruptured by the AA 'cross section in (a). FIG. 3 illustrates an exploded view before assembling the heat recovery unit 6 and a cross-sectional view of each resin component.

  As shown in FIGS. 2 and 3, the heat recovery unit 6 bonds, for example, three types of resin parts 61, 62, and 63 including a multi-hole tube 61, a first header unit 62, and a second header unit 63. It is formed by joining by such means. The resin parts 61, 62, and 63 are individually molded with resin and then joined at the position indicated by the dotted line in FIG. 2 and assembled as a heat recovery unit 6. 1 illustrates the configuration in which the inlet 6A and the outlet 6B of the heat recovery unit 6 are divided into the first header 62 and the second header 63, but in FIG. And the case where the outflow port 6B is arrange | positioned together in the 2nd header part 63 is illustrated. As shown in FIG. 2, the flow path in the heat recovery unit 6 is bent in a crank shape and is elongated. The two header parts 62 and 63 are necessary for collecting, branching, and connecting the flow paths at the end of the multi-hole pipe 61.

  More specifically, a plurality of flow paths extending in parallel with each other are formed inside the multi-hole tube 61. The first header portion 62 is connected to the multi-hole pipe 61 at a position (coupling surface P) on one side of each flow path in order to connect at least a part of each flow path to one side in the length direction. Are combined. The second header portion 63 is connected to the multi-hole pipe 61 at a position (coupling surface P ′) on the other side of each flow path in order to connect at least some of the flow paths to each other on the other side in the length direction. Is bound to.

  Next, with reference to FIG. 4, the temperature distribution on the back surface of the power generation unit will be described. FIG. 4 is an explanatory diagram illustrating a longitudinal section of the solar heat and power combined panel, the arrangement of solar cells, and the temperature distribution on the back of the power generation unit in the first embodiment of the present invention. In this figure, FIG. 4 (a) is a solar heat and power supply panel broken along the line AA 'in FIG. 2 (a). FIG. 4B is a cross-sectional view of the solar heat and power supply panel cut along the line FF ′ in FIG. 4A, and the solar cells 3A arranged in a grid at regular intervals. Shows the arrangement. On the other hand, FIG.4 (c) has shown the positional relationship of the temperature distribution of the electric power generation part back surface, and the photovoltaic cell 3A.

  As described above, most of the solar energy is once absorbed by the solar cells 3A, and therefore, the power generation unit has the highest temperature at the site where each solar cell 3A is disposed. As a result, as shown in FIG. 4C, the temperature of the heat recovery unit 6 is highest at a position overlapping the center of the back surface of each solar cell 3A, and the temperature decreases as the distance from the position overlapping the center of the back surface increases. To do. As can be seen from this, in order to protect the joint part between the resin parts from high temperature, the joint part is arranged as far as possible in the horizontal direction from the center of the back surface of the solar battery cell 3A on the back side of the power generation part. There is a need to. In addition, the horizontal direction means the direction where the plane including the solar heat and power supply panel expands.

  Based on the above consideration, in the present embodiment, the connecting portion between the resin parts of the heat recovery portion 6 is configured as follows. FIG. 5 is an explanatory diagram showing a positional relationship between the solar battery cell and the coupling part of the resin component in the first embodiment of the present invention. The upper and middle stages of this figure show drawings that are substantially the same as FIGS. 4 (a) and 4 (b), respectively. Further, the lower part of FIG. 5 is a cross-sectional view of the heat recovery section 6 broken at the GG ′ section in FIG. In the present embodiment, the first header part 62 and the multi-hole pipe 61 are joined at the position of the joint surface P by bonding or welding, and the second header part 63 and the multi-hole pipe 61 are joined at the position of the joint face P ′. Are connected.

  The coupling surfaces P and P ′ of the heat recovery unit 6 are arranged on the back surface of the space secured between the solar cells 3A. In other words, the coupling surfaces P and P ′ are positions that do not overlap with the solar cells 3A in a plan view of the plane in which the solar cells 3A are arranged from the vertical direction, that is, between the solar cells 3A. It is arranged at the interval part.

  By adopting such an arrangement, the coupling surfaces P and P ′, which are the coupling portions of the resin parts, can be separated from the center portion of the back surface of the solar battery cell 3A where the temperature is the highest. P ′ can be protected from high temperatures. Therefore, according to the present embodiment, even when a resin structure is used as the heat recovery unit 6, the bonding surfaces P and P 'can be arranged so as not to be exposed to high temperatures, and the reliability can be improved. In addition, the reliability of the joint can be maintained over a long period of time while using a low-cost joining method such as adhesion or welding.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIGS. The feature of this embodiment is that, when the arrangement of the coupling portions present in the heat recovery unit is different from that of the first embodiment, the configuration is such that heat is not easily transmitted to each coupling unit. FIG. 6 is a cross-sectional view and an exploded view showing a heat recovery part of a solar heat and power supply panel in Embodiment 2 of the present invention.

  As shown in FIG. 6, the multi-hole pipe 61 of the present embodiment is formed by joining a plurality of small multi-hole pipes 61A preliminarily molded by bonding or welding. At least one flow path is formed in each small multi-hole tube 61A. The plurality of small multi-hole tubes 61A are coupled in a state of being arranged in parallel with each other. The header portions 62 and 63 are also formed by joining a plurality of divided parts 62A and 63A, respectively.

  FIG. 7 is an explanatory diagram showing a positional relationship between the solar battery cell and the joint portion of the resin component in the second embodiment of the present invention. As shown in this figure, in the present embodiment, the coupling surfaces P1, P1 ′ of the small multi-hole tubes 61A constituting the multi-hole tube 61 are also arranged between the solar cells 3A in plan view. Yes. According to this configuration, even when a plurality of small multi-hole pipes 61A arranged in parallel are combined to form the multi-hole pipe 61, the same effect as in the first embodiment can be obtained. That is, the reliability of the heat recovery unit 6 can be improved while a large number of flow paths are formed in parallel by low-cost extrusion molding.

  In the first and second embodiments, the case where the multi-hole tube 61 is formed by low-cost extrusion molding is illustrated. However, as in the modification shown in FIG. And a method of joining the flat plate 71 to each other. Further, the grooved plate 70 may be formed by machining a thick flat plate or by vacuum forming. FIG. 8 is a cross-sectional view and an exploded view showing a heat recovery part of a solar heat and power supply panel according to a modification of the present invention.

DESCRIPTION OF SYMBOLS 1 Transmission layer, 2 Upper sealing layer, 3 Electric power generation layer, 3A Solar cell, 4 Lower sealing layer, 5 Insulation layer, 6 Heat recovery part, 6A inlet, 6B outlet, Multi-hole pipe 61 (resin part) , 61A Small multi-hole tube, 62 1st header part (resin part), 63 2nd header part (resin part), P, P ', P1, P1' Joint surface (joint part)

Claims (4)

A plurality of solar cells that receive sunlight to generate power, and each of the solar cells is arranged in a plane with an interval between each other,
A heat-recovering unit, which is a hollow resin structure in which a flow path of a heat medium is provided, and is formed by joining a plurality of resin parts, and is disposed along the back surface of the power generation unit. ,
The connecting part of the plurality of resin parts constituting the heat recovery part is arranged in a space portion between the solar cells in a plan view of the plane where the solar cells are arranged as viewed from the vertical direction. Solar combined heat and power panel. The resin component constituting the heat recovery unit is:
A multi-hole tube in which a plurality of flow paths extending in parallel with each other are formed;
A first header portion coupled to the multi-hole pipe at a position on one side of each flow path in order to connect at least some of the flow paths to each other on one side in the length direction;
A second header portion coupled to the multi-hole pipe at a position on the other side of each flow path in order to connect at least some of the flow paths to each other on the other side in the length direction; ,
The configuration is such that the coupling portion between the first header portion and the multi-hole tube and the coupling portion between the second header portion and the multi-hole tube are arranged in a space portion between the solar cells. The solar heat and power supply panel described. The multi-hole tube is formed by juxtaposing and connecting a plurality of small multi-hole tubes each having the flow path formed therein in parallel, and a connecting portion of the small multi-hole tubes is spaced between the solar cells. The solar heat and power supply panel according to claim 2 , wherein the solar heat and power supply panel is configured to be arranged in a portion.   The solar heat and power supply panel according to any one of claims 1 to 3, wherein the coupling portion is formed by adhesion or welding.

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