JPS5837449A - Hybrid collector with solar battery and solar heat collecting device - Google Patents

Abstract

PURPOSE:To make it possible to collect heat at high temperature and to enhance light converging efficiency, by arranging the solar batteries under the vacuum glass tube type heat collecting devices. CONSTITUTION:A plurality of the vacuum glass tube type heat collecting devices 6 wherein heat collecting fins 3 and heat collecting tubes 4 are arranged in parallel with an interval being provided. Many solar batteries are arranged under the intervals. Reflecting plates 7 are provided between each of the solar batteries 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a collector that can obtain electricity and heat at the same time by combining a solar cell and a solar heat collector, and particularly relates to a collector that can obtain electricity and heat at the same time by combining a solar cell and a solar heat collector, and particularly relates to a collector that can obtain electricity and heat at the same time. The present invention relates to a suitable structure for combining a heating device and a solar cell.

Conventionally, regarding a collector that combines a solar cell and a solar heat collector (hereinafter referred to as a hybrid collector), a structure as shown in FIG. 1 has been mainly studied. In this way, the basic structure is the same as a conventional flat plate heat collector,
The solar cells are placed on the heat collecting fins of a flat plate heat collector.

The biggest problem with this structure is that the performance of solar cells decreases as the temperature increases, so the temperature of the heat collecting fins cannot be raised, and the heat collecting temperature is limited to about 50C or less. be.

Furthermore, as shown in FIG. 2, a system in which solar cells are placed above the heat collecting fins of a vacuum tube type heat collector is also being considered.

This method also has the problem of not being able to raise the heat collection temperature as in the case of Fig. 1, but it also has the problem that the inside of the glass tube is
40 for long-term sealing in a high vacuum of forr or less.
It is necessary to bake at a high temperature of about 0C. but,
Since solar cells do not have heat resistance to high temperatures of about 4,000 ℃, they cannot be baked sufficiently and it is difficult to maintain them in a high vacuum for a long period of time.

Due to the above points, hybrid collectors have not yet reached the stage where they are commercially available in Japan.

An object of the present invention is to provide a suitable structure when attempting to obtain electricity and heat at the same time by combining a solar cell and a vacuum tube type heat collector.

As mentioned above, the present invention is based on the fact that the heat collection temperature is restricted when the heat collection fins and solar cells are brought into close contact with each other, and in the vacuum glass tube type heat collector, it is necessary to provide a certain distance between the glass tubes. Focusing on the fact that currently about 40% of incident light escapes as a loss at the bottom of the glass tube, we devised a structure in which solar cells are placed at the bottom of a vacuum glass tube heat collector. It is something.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. In this way, this embodiment has a structure in which the solar cells are placed below the vacuum tube type heat collector, which is commonly used in the past. In this case, the solar cell is placed below the gap between the glass tubes. In addition, solar cells are usually
A module packaged with transparent resin such as acrylic or polycarbonate (hereinafter referred to as a solar cell module) is used, but the parts of the module where there are no solar cells are covered with a material with high solar reflectance (reflector plate) made of polished aluminum or stainless steel. ).

Since this embodiment has the above-mentioned structure, the sunlight passing through the gap between adjacent glass tubes and the gap between the heat collecting fin and the inner diameter of the glass tube to the part of the heat collector is It can be incident on solar cells and obtain electrical output,
Moreover, at the same time, thermal energy can be obtained from the heat collector in the same manner as before. In addition, sunlight that enters the reflector is reflected and enters the heat collecting fins. Heat and electricity obtained from solar collectors and solar cells will be used in the same way as before. Although the basic structure of the solar heat collector is the same as the conventional one, if it is desired to increase the electrical output, it is necessary to increase the spacing between the glass tubes compared to the conventional one. In a solar cell module, it is necessary to arrange the solar cells so that they are located in the gap between the glass tubes.

Figure 5 shows another embodiment of the present invention, in which reflective plates are attached inside and outside the glass tube on a straight line connecting the ends of the heat collecting fins and the ends of the solar cells. . Therefore, in the embodiment shown in Fig. 4, the reflector is installed so that the sunlight incident on the reflector is incident on the back surface of the heat collecting fin, whereas in the embodiment shown in Fig. 5, the reflector is attached to the bottom of the heat collecting fin. It is possible to concentrate the sunlight that has passed through the solar cell in the direction of the solar cell, thereby relatively increasing the efficiency of the solar cell.

FIG. 6 shows an embodiment in which solar cells are placed between glass tubes in a V-shape. According to this example, the solar cells are placed diagonally, and by providing an interval of about 2 to 3 spaces at the bottom of the V-shape, it is possible to reduce the adhesion of substances such as dust to the solar cells. .

Figure 7 shows a structure in which a reflecting mirror is placed between the glass tubes and a solar cell is placed below the heat collecting fins. In the embodiments shown in FIGS. 3 and 5, when the reflected light enters the solar cell from the vertical direction of the collector through the gap in the glass tube, the reflected light is reflected by the glass.

Although it is conceivable that the loss may escape upward through the gaps in the lath tube, such loss is almost eliminated in the embodiment shown in FIG. Furthermore, the proportion of sunlight that enters the solar cells can be increased.

According to the present invention, there are the following effects.

(1) A solar/thermal hybrid collector that can collect heat at high temperatures can be manufactured.

(2) It is possible to utilize the incident light that was transmitted to the lower part of the conventional vacuum tube type heat collector and was lost.

(3) Since the solar cell and the heat collector are each independent, manufacturing is easy.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a hybrid collector that combines a conventional solar cell and a flat plate type heat collector. Figure 2 is a cross-sectional view of a hybrid collector that combines a conventional solar cell and a vacuum tube type heat collector. FIG. 4 is a plan view of the hybrid collector shown in FIG. 3, and FIGS. 5, 6, and 7 are other embodiments of the present invention. FIG. 2 is a cross-sectional view of a hybrid collector showing.

Claims (1)

[Claims] 1. A solar heat collector consisting of a plurality of transparent tubes containing solar cells capable of converting sunlight energy into electrical energy and elements capable of converting sunlight energy into thermal energy. A solar cell/solar heat collector in which the solar cell/solar heat collector is combined, and the solar cell/solar heat collector is characterized in that the solar cell is arranged on the back side of the plurality of transparent tubes with respect to the direction of incidence of sunlight. Heater no-brid collector. 2. The purpose is to reflect sunlight incident on a portion of the back side of the plurality of transparent tubes where the solar cells are not arranged in the item 1 above to an element that can convert the sunlight energy into thermal energy. A solar cell/solar heat collector/hybrid collector characterized by arranging a material made of 3. In the above item 1, inside or outside the transparent tube,
Alternatively, the battery/solar heat collector hybrid collector is characterized in that a material is disposed inside and outside for the purpose of reflecting incident sunlight onto the solar cell portion. 4. The solar cell/solar heat collector hybrid collector according to item 1 above, characterized in that the solar cells are arranged between a plurality of the transparent tubes so that the cross section is V-shaped. 5. In the above item 1, the solar cell is arranged on the back side of the element capable of converting sunlight energy into thermal energy with respect to the sunlight incident direction, and the space between the transparent tubes is arranged between the adjacent transparent tubes. 1. A solar cell/solar heat collector hybrid collector, characterized in that a material is arranged for the purpose of reflecting sunlight that has passed through and is incident on the solar cell portion.