JP2002349972A - Solar collector, photovoltaic power generation unit and system thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel solar collector, capable of indirect collection of heat from a solar cell module more efficiently and easily, and to provide a solar cell unit or system having the same. SOLUTION: The solar collector of a photovoltaic power generation unit having the solar cell module is provided with a bag-like body (6) made of a flexible sheet (61) and facing header pipes (7A) and (7B), disposed in parallel with facing sides (62A) and (62B) in the bag-like body (6). When heat is collected, one (7A) of the header pipes makes heating medium from the outside flow into the interior of the body (6) through a heat medium discharge port (73A), and the other (7B) of the header pipes makes the heating medium which is flowing in the interior of the body (6) from the opposite header pipe (7A) to flow into the pipe through a heat medium intake port (73B) and discharges the heating medium to the outside. The body (6) is inflated by the heating medium, flowing in from the opposite header pipe (7A), so as to be brought into close contact with the rear face of the solar cell module.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar heat collecting apparatus. More specifically, the invention of this application is a power generation unit or system including a solar cell, which can efficiently and easily perform indirect heat collection from the solar cell, and a new solar heat collector, The present invention relates to a new photovoltaic power generation unit or system having the same.

[0002]

2. Description of the Related Art Solar energy has been attracting attention with increasing interest in energy and environmental issues. In particular, a solar power generation system for converting solar energy into electric power has been put into practical use. This photovoltaic power generation system is usually constructed such that a plurality of photovoltaic power generation units having photovoltaic modules are arranged in rows from the eaves side to the ridge side on the roof surface of a house or the like. .

By the way, when further effective use of solar energy is considered, not only solar energy but also solar thermal energy can be utilized by the solar power generation unit arranged on the roof surface as described above. Conceivable. That is, for example, on the same roof surface, power is generated by sunlight, and solar heat is collected as hot water.

However, conventionally, in order to simultaneously perform solar power generation and solar hot water collection on the same roof surface,
It is necessary to install a solar water heater and the like that are separate from the solar power generation unit, and there is a problem that the number of the solar power generation units must be reduced on a roof having a limited area. This hinders the effective use of solar energy.

Therefore, an electric-heat hybrid type photovoltaic power generation unit and a photovoltaic power generation unit capable of simultaneously realizing solar hot water collection together with photovoltaic power generation without reducing the efficiency of photovoltaic power generation are used. An electric-heat hybrid type solar power generation system has been studied.

[0006] In this electrothermal hybrid type solar power generation unit or solar power generation system, for example, as shown in FIG. A metal water pipe or a metal fin (heat collecting plate) integrated with a metal water pipe is provided in a gap between the solid case material (4) in the disposed case body (3). In addition, it is considered to arrange a heat collector (5) in which these are brought into close contact with the back surface of the solar cell module (1) and a heat medium is passed through the water pipe.

[0007]

The electrothermal hybrid type photovoltaic power generation unit and the photovoltaic power generation unit as described above are attracting attention as ones that expand the possibility of using solar light. Since the heat collection in the heat collector (5) is an indirect heat collection on the back surface of the solar cell module (1), it has been desired to make the heat collection more efficient.

In fact, in the case of the heat collector (5) using a water pipe or a fin, these are made of metal and have high rigidity, and the solar cell module (1) also has high rigidity. It is not easy to adhere to the back surface of the solar cell module (1), and therefore, there is a problem that heat collecting performance is not always good. Also, for heat collection performance,
There was a problem that the production and construction were inevitably expensive.

Therefore, the invention of this application solves the above-mentioned problems, and enables a more efficient and easy indirect heat collection from a solar cell module. And to provide a solar cell unit or system including the same.

[0010]

Means for Solving the Problems The present invention solves the above-mentioned problems. First, the present invention relates to a solar heat collecting apparatus in a solar power generation unit having a solar cell module, wherein a flexible sheet is provided. It has a bag-shaped body and a pair of opposed header tubes parallel to a pair of opposed sides in the bag-shaped body, and at the time of solar heat collection, one opposed header tube is
A heat medium from the outside is caused to flow into the bag-like body from a heat medium discharge hole provided in the tube wall, and the other opposed header tube is configured to transfer the heat medium flowing through the bag-like body from the one opposed header tube to the tube wall. The bag-like body is taken into the tube from the heat medium outlet hole provided in the tube and flows out to the outside, and the bag-like body is swelled by the heat medium flowing from the one opposed header tube so as to be in close contact with the back surface of the solar cell module. A solar heat collecting apparatus is provided.

The invention of the present application also provides a solar heat collecting apparatus characterized in that the bag-like body is formed by laminating a flexible sheet. Fourth, the flexible sheet is a solar heat collector characterized in that a synthetic resin sheet is laminated and adhered to both sides of a metal sheet. Fourth, the flexible sheet is integrated with the solar cell module by a case body. Fifthly, a drain heat hose is connected to the case body, and a drainage hose for leading water leaking into the case body to a rain gutter is connected to the case heat collector. I will provide a.

Sixth, the invention of this application is characterized in that a plurality of any of the above-mentioned solar heat collecting apparatuses are connected to each other by an opposed header tube so that a heat medium flows. And a solar heat collector.

Further, the invention of this application provides, seventhly, a photovoltaic power generation unit comprising any one of the above-mentioned solar heat collecting apparatuses, and eighthly, the above-mentioned solar heat collecting unit. Provided is a photovoltaic power generation system comprising the device.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention of the present application has the features as described above, and the embodiments will be described in more detail below with reference to the accompanying drawings.

FIG. 1 is a plan view illustrating the concept of the main part of the solar heat collecting apparatus of the present invention. For example, as exemplified in FIG. 1, the solar heat collecting apparatus of the invention of this application is a bag-like body (6) of a flexible sheet (61).
And a pair of opposing sides (62A) (6) in the bag-shaped body (6).
2B) and a pair of opposed header tubes (7A) (7
B).

Although the bag-like body (6) is formed of a flexible sheet (61), it may be formed of one flexible sheet (61), or may be formed of two or more sheets. The objects may be bonded together and molded. For example, FIG. 2 illustrates a cross section of the peripheral portion AA in FIG. As exemplified in FIG. 2, the flexible sheet (61)
Can be bonded and sealed around the bag-like body (6) by adhesion or welding.

The flexible sheet (61) is required to have heat resistance required as a heat collector and strength to prevent a heat medium from leaking, and to have flexibility. I do. And it is assumed that the heat conductivity as a heat collector is high.

The flexible sheet (6
As 1), as illustrated as an enlarged cross section in FIG. 2, a synthetic resin sheet may be laminated and attached to both surfaces of a metal sheet (61A) of aluminum or the like. For example, a PP resin layer (61B) having heat resistance and capable of heat welding is provided on the inner surface thereof, and a PET resin layer (61B having both good heat resistance and strength) is provided as the outermost layer.
C) can be laminated.

The bag-like body (6) is provided with a pair of opposed header tubes (7A) and (7B). The opposing header tubes (7A) (7B) each have an inlet end (71
A) With the (71B) and the outlet ends (72A) (72B) protruding outward from the bag-like body (6), they are close to and parallel to the opposite sides (62A) and (62B) in the bag-like body (6). It is arranged.

One of the opposed header tubes (7A) parallel to one of the opposed sides (62A) is connected to the opposite opposed side (6A).
2B) has a heat medium discharge hole (73A) opened in the direction of the other opposed header tube (7B) parallel to the other header tube (7B). Similarly, the opposed header tube (7B) has the opposed header tube (7B).
A heat medium outlet hole (73B) opened in the direction A) is provided on the tube wall. A plurality of the heat medium discharge holes (73A) and the heat medium discharge holes (73B) facing each other are arranged at arbitrary intervals in the longitudinal direction of the opposed header tubes (7A) and (7B) in the bag-like body (6). Preferably, in this case, it is more preferable to dispose it over substantially the entire length in the bag-like body (6).

At the time of solar heat collection, the opposing header tube (7A) allows a heat medium from the outside to flow into the bag-like body (6) from the heat medium discharge hole (73A), and the opposing header tube (7B).
Takes the heat medium flowing from the opposed header tube (7A) into the bag-like body (6) into the tube through the heat medium outlet hole (73B) and causes the heat medium to flow out. The bag-like body (6) It is swollen by the heat medium flowing from the tube (7A) and closely adheres to the back surface of the solar cell module.

The solar heat collecting apparatus having the bag-like body (6) and the opposed header tubes (7A) (7B) as described above, for example, as shown in FIG. 1) can be integrated.
More specifically, for example, a bag-like body (6) is provided on the back side of the solar cell module (1) covered with the cover glass (2).
Is placed, and is supported by a solid heat insulating material (4) such as a foamed resin and inserted into the case body (3). As a countermeasure against water leakage in this case, as shown in FIG. 3, the bag-like body (6) can be integrated with the case body (3), so that, for example, as shown in FIG. A discharge hose (9) capable of discharging water in the case body (3) to the rain gutter (8) even in case of water leakage can be connected to the case body (3).

The operation during the heat collecting operation will be further described. The heat medium is supplied from the inlet end (71A) to the opposed header tube (7A).
And flows into the bag-like body (6) from each heat medium discharge hole (73A) in the tube wall. The bag-like body (6) on the solid heat insulating material (4) expands due to the inflowing heat medium, and is brought into close contact with the back surface of the solar cell module (1), thereby enabling highly efficient heat collection by heat conduction. On the other hand, when the operation is stopped, the bag-shaped body (6) withers and the heat collection is stopped.

The heat medium that has absorbed the solar heat flows in the bag-shaped body (6) toward the opposite header tube (7B) on the opposite side, is taken into the tube from the heat medium outlet hole (73B), and exits at the outlet end. It will flow out of the bag-like body (6) from (72B).

As described above, in the invention of this application, by using the bag-like body (6) constituted by the flexible sheet (61), the bag-like body (6) is heated due to its shape freedom. When the medium enters, it expands under the pressure and adheres tightly to the solar cell module (1), so that reliable and effective indirect heat collection is possible. The heat collecting performance is more excellent than a rigid heat collecting body such as a metal water pipe or a fin. In addition, the material and manufacturing are inexpensive, the assembling work is easy, and the replacement or repair of the bag-shaped body (6) is easy when a trouble occurs.

Further, the opposed header tubes (7A) (7
Due to the heat medium inflow and outflow during B), the uniformity of the heat medium in the bag-shaped body (6) is ensured, and the heat collection efficiency is further improved. For example, the heat medium discharge holes (73A) and the heat medium outflow holes ( By adjusting the diameter, number, interval, etc. of 73B), high uniformity of the heat medium and heat collection efficiency can be more easily realized.

In the invention of this application, a plurality of the above-mentioned solar heat collecting apparatuses may be connected to each other in parallel as illustrated in FIG. 5, for example, or may be illustrated in FIG. As described above. In this case, the opposed header tubes (7A) (7
By connecting the inlet end (71A) (71B) and the outlet end (72A) (72B) of B) with a joint hose or the like, a parallel / series system configuration can be obtained.

In any case, the solar heat collecting apparatus of the invention of the present application described in detail above can constitute a solar power generation unit or a system thereof by integrating with a solar cell module.

Of course, the invention of this application is not limited to the above examples, and various embodiments are possible for the details.

[0030]

As described above in detail, according to the invention of this application, the solar cell module is extremely efficiently and easily realized for realizing a combined function of power generation in a solar cell module by sunlight and solar heat collection. A new solar heat collecting apparatus capable of indirect heat collection from a solar cell and a new solar cell unit or system including the same.

[Brief description of the drawings]

FIG. 1 is a schematic plan view illustrating a solar heat collecting apparatus of the present invention.

FIG. 2 is a partial cross-sectional view illustrating a bag-shaped flexible sheet.

FIG. 3 is a cross-sectional view illustrating an example of a configuration incorporated in a solar cell unit.

FIG. 4 is a cross-sectional view illustrating the arrangement of a drain hose.

FIG. 5 is a plan view illustrating parallel connection;

FIG. 6 is a plan view illustrating a serial connection;

FIG. 7 is a cross-sectional view showing an example of a conventional heat collector.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 solar cell module 2 cover glass 3 case body 4 solid heat insulator 5 heat collector 6 bag-like body 61 flexible sheet 61A metal sheet 61B PP resin layer 61C PET resin layer 62A, 62B opposing sides 7A, 7B opposing header pipe 71A , 71B Inlet end 72A, 72B Outlet end 73A Heat medium discharge hole 73B Heat medium discharge hole 8 Rain gutter 9 Drain hose

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroshi Itoyama 1048 Oaza Kadoma, Kadoma-shi, Osaka Matsushita Electric Works F-term (reference) 2E108 LL01 NN01 NN07 PP00 5F051 BA03 BA18 JA09 JA18

Claims (8)

[Claims] 1. A solar heat collecting apparatus in a photovoltaic power generation unit having a solar cell module, comprising: a bag-shaped body of a flexible sheet; and a pair of opposed header tubes parallel to a pair of opposed sides in the bag-shaped body. At the time of solar heat collection, one of the opposed header tubes allows a heat medium from the outside to flow into the bag-like body from a heating medium discharge hole provided in the tube wall, and the other opposed header tube has the The heat medium flowing through the bag-shaped body from one of the opposed header tubes is taken into the tube from the heat medium outlet hole provided in the tube wall and allowed to flow out, and the bag-shaped body flows in from the one opposed header tube. A solar heat collecting apparatus characterized in that it is swollen by a heat medium and adheres to the back surface of the solar cell module. 2. The solar heat collecting apparatus according to claim 1, wherein the bag-like body is formed by laminating a flexible sheet. 3. The solar heat collecting apparatus according to claim 1, wherein the flexible sheet is formed by laminating a synthetic resin sheet on both sides of a metal sheet. 4. The solar heat collecting apparatus according to claim 1, wherein the solar heat collecting apparatus is integrated with the solar cell module by a case body. 5. The solar heat collecting apparatus according to claim 4, wherein a drain hose for leading water leaking into the case body to a rain gutter is connected to the case body. 6. A solar heat collector according to claim 1, wherein a plurality of solar heat collectors according to any one of claims 1 to 5 are connected to each other by an opposed header tube so that a heat medium flows therethrough. Thermal equipment. 7. A solar power generation unit comprising the solar heat collecting apparatus according to claim 1. 8. A solar power generation system comprising the solar heat collecting apparatus according to claim 6.