JP2000064543A - Solar cell cooling structure installed in the building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool a solar cell without obstructing sunlight and to enable the cooling of the solar cell without requiring an special power. SOLUTION: A vent space 2 is formed between a solar cell panel 3 and the outside of a building exterior wall 1 providing the panel thereto, and air used for an indoor cooling is supplied to the vent space 2 from an air outlet 4. By the constitution, the solar cell panel 3 is cooled by air passing through the vent space 2.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for cooling a solar cell panel installed on an outer surface of a building. 2. Description of the Related Art A solar cell is an element that directly generates electric power by the light energy of the sun, and is excellent in that it does not generate harmful substances during power generation. Is installed along the roof or outer wall of a building to obtain power. [0003] However, there is a problem that the power generation efficiency of a solar cell is reduced when the temperature becomes high. However, there is another problem that power generation is stopped when the sunlight, which is the largest heat source of the temperature rise, is blocked. There is a defect. Accordingly, an object of the present invention is to cool a solar cell without interrupting sunlight, and to cool a solar cell without requiring special power, and therefore, with little equipment and operation costs. It is intended to be. According to the present invention, a ventilation gap is formed between a solar cell panel and an outer surface of a building where the solar cell panel is installed, and the solar cell panel is cooled by air passing through the ventilation gap. This is a cooling structure for a solar cell installed in a building. [0006] The outer surface of the building on which the solar cell panel is installed mainly includes the outer wall surface of the building and the upper surface of the roof. . Preferably, the solar panels are installed along the outer walls of the building or along a sloping roof, with one end preferably at a higher elevation than the other, but are installed substantially along a nearly horizontal roof. It may be horizontal. When the solar cell panel is heated by the sunlight, the air in the ventilation gap between the panel and the outer surface of the building is heated and moves, generating an airflow there, and the air that has not been heated yet. The heat of the solar cell panel is transferred to the new air. While the solar cell panel is cooled by the airflow, the sunlight continues to irradiate the solar cell panel, so that high power generation efficiency is maintained. In particular, when one end of the solar cell panel is higher than the other end, the heated air rises in the ventilation gap and is discharged to the other. When a new airflow enters, a new airflow always exists in the ventilation gap, and the solar cell panel is constantly cooled. [0009] Further, the solar cell panel can be cooled by supplying exhaust air from the room after being used for cooling for air conditioning of the building to the ventilation gap. Also in this case, the air heated by cooling the solar cell panel rises through the ventilation gap and is discharged. FIG. 1 is an explanatory view showing a first embodiment of the present invention. In this embodiment, the outer wall 1 of the building
The solar cell panel 3 is installed on the outer surface of the device through a ventilation gap 2. The ventilation gap 2 is open to the outside at the top and bottom, and the air heated inside the solar cell panel rises and is discharged inside, so that new air is released from the lower part of the ventilation gap 2.
To cool the solar cell panel 3, and this is repeated. Thus, in this embodiment, the ventilation gap 2
, An upward airflow is constantly generated, and this cools the solar cell panel 3 to maintain it at a predetermined temperature, so that it is possible to prevent a decrease in power generation efficiency in the solar cell panel 3. As means for installing the solar cell panel 3 in FIG. 1, for example, a grid-like frame is installed at a position slightly away from the outer wall 1 to form a ventilation gap, and the solar cell panel 3 is mounted on this frame. It is good to arrange. In addition, since the ventilation gap 2 is for allowing the upward air flow to pass, the ventilation gap 2 may not be continuous in the horizontal direction (the direction perpendicular to the plane of FIG. 1). That is, the plurality of vertically long members are fixed to the outer wall in parallel with each other, and the solar cell panel 3 is fixed to the surface of the plurality of vertically long members. May be formed. FIG. 2 is an explanatory view showing a second embodiment. In this embodiment, a solar cell panel 3 is installed on an outer wall 1 of a multi-story building via a ventilation gap 2. Since the ventilation gap 2 may be continuous vertically, the solar cell panel 3 may be supported by a mounting bracket (not shown) projecting from the outer wall 1. An air outlet 4 from the room is opened on the outer wall 1, and the air used for cooling the room is supplied from the air outlet to the ventilation gap 2, where the solar cell panel 3 is cooled. ing. Here, too, the air heated by cooling the solar cell panel 3 rises through the ventilation gap 2 and is discharged to the outside. At the time of cooling by the air conditioner, the air used for cooling usually returns to the air conditioner, and a part is exhausted and the remaining part is circulated indoors. The air may be exhausted from the air outlet 4. For this purpose, the amount of air returned to the air conditioner from the air conditioner is reduced compared to the amount of air discharged from the air conditioner to the room, and fresh air is added to the amount of returned air and supplied to the room again as cooling air. Unless leakage from the entrance or the like is taken into account, an amount of air corresponding to the added fresh air is exhausted from the air outlet 4. In the above two embodiments, the configuration in which the solar cell panel 3 is installed on the outer wall 1 has been described. However, the solar cell panel 3 is substantially placed along an inclined roof or on a substantially horizontal roof. It can also be arranged horizontally. When placed on a sloping roof, the solar panel is cooled by airflow from below to above as in the embodiment of FIG. 1, and when placed substantially horizontally, by natural wind. An airflow is generated in the ventilation gap to cool the solar cell panel. Also in the case of installing these roofs, cooling may be performed by supplying the cooling air shown in FIG. 2 to the ventilation gap on the back surface of the solar cell panel using a simple mechanism such as a duct. As described above, according to the present invention, since the solar cell panel is cooled by the air passing through the ventilation gap, the solar cell can be cooled without blocking the sunlight. There is an effect that can be. In addition, there is an effect that the solar cell can be cooled without requiring extra power, and therefore, with almost no equipment and operation costs.

[Brief description of the drawings] FIG. 1 is an explanatory diagram showing a first embodiment. FIG. 2 is an explanatory diagram showing a second embodiment. [Explanation of symbols] 1 outer wall 2 Ventilation space 3 Solar panel 4 Air outlet

Claims (1)

Claims: 1. A ventilation gap is formed between a solar cell panel and an outer surface of a building where the solar cell panel is installed, and the solar cell panel is cooled by air passing through the ventilation gap. A solar cell cooling structure installed in a building.