JP2001241775A - Solar cell (solar panel) cogeneration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system constitution for obtaining an effective use of a thermal energy wherein enhanced an efficiency is enhanced by raising its temperature of a medium by preventing a temperature rise of a solar panel in a hybrid type solar system. SOLUTION: 1. A light receiving surface of the solar panel is connected to a low temperature side inlet of a thermal energy recovery medium and cooled to prevent a temperature rise of the panel. 2. A heater constituted of a translucent material to transmit an optical energy and to recover a thermal energy is provided on an upper surface of the panel. The medium output from the panel is introduced thereinto to recover and rise a temperature of the thermal energy. The medium is recirculated to obtain a high temperature as needed. 3. The medium becoming the high temperature is introduced into a thermal storage tank to heat exchange with another medium (having a large specific heat and gravity) convenient for heat utilization and the heat is stored. 4. The medium convenient for the heat utilization is transported and circulated to a using equipment side by a transfer unit and effectively utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar co-generation system for simultaneously recovering photovoltaic power and thermal energy to effectively use electricity and heat.

[0002]

2. Description of the Related Art A typical example of a conventional system is shown in FIGS. Conventional solar panels, which collect and utilize solar energy as electric energy, are inefficient and remain at only 10% to 15% of incident energy, so heat energy is also recovered. Hybrid schemes have been proposed. In this method, the air is heated through a heating box installed on the upper surface of the solar panel and stored in a heat storage material provided on the lower surface of the panel, and is also stored in a heat storage tank through an outlet connecting pipe. Brick, etc. are provided in the heat storage tank to keep the outside warm. Also, the stored heat is sent to the heat utilization equipment by the air fan to measure the heat exchange respectively and use the heat effectively. ing.

[0003]

In the above conventional method,
The temperature rise of the solar panel is inevitable. It is preferable to maintain the solar panel at room temperature as much as possible, and the higher the temperature, the lower the output. Heat recovery, on the other hand, requires the use of a medium in a high temperature state, but the higher the temperature, the lower the power, and the lower the overall efficiency.
In addition, air is also used as the medium on the heat utilization side, and bricks and the like are used in the heat storage tank, so that the storage capacity and utilization facilities become excessive.

[0004]

Means for Solving the Problems The following method is used to solve the two contradictions of cooling the solar panel and increasing the temperature of the medium and to effectively use electricity and heat energy.

[0005] The light-receiving surface of the solar panel is connected to the low-temperature inlet of the thermal energy recovery medium to cool the panel, thereby preventing the temperature of the panel from rising.

[0006] A transparent body is formed on the upper surface of the solar panel,
A heating device for transmitting light energy and recovering heat energy is provided, and a medium exiting from the solar panel is introduced into the heating device to recover the heat energy and raise the temperature.

[0007] The medium which has become hot is introduced into a heat storage tank,
Performs heat exchange with another medium (specific heat, one having a large specific gravity) convenient for heat utilization and stores it as a heat source.

[0008] Another medium convenient for heat utilization is transported and circulated to the equipment to be used by the transfer device for effective utilization. In general, air as a medium is free from the possibility of freezing and corrosion, and therefore has an advantage in the effective use of panel cooling. However, since the heat capacity is small, the space of the heat storage tank becomes large.
Further, when air is used at the place of use, the size of the cooling / heating equipment and piping equipment requiring heat exchange becomes large, which is uneconomical in terms of space and operation.

Therefore, in the case of this system, as shown in the embodiment, air is used as a medium for cooling and heat recovery of the solar thermal panel, and the heat utilization device after the heat storage tank has a large heat capacity and a high heat transfer coefficient, so that piping is arranged. It is more effective to use easy-to-handle and safe water as the medium on the user side.
(Of course, a single medium (air or
Water, etc.), but the above points should be taken into account.)

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings based on examples. FIGS. 1-4 show a configuration example of a system using air as a heat recovery medium for sunlight incident energy and water as a medium for heat storage and utilization as a representative embodiment of the present invention.

In FIG. 1-4, solar panels 1. H 仝 casing2. 2. A cable that is built in and converts the incident energy of sunlight to generate electric power. 3. Connection box And inverter 5. 5. Distribution cable via It is used as more power.

The cooling medium (Ex. Air) is supplied to the solar panel casing 2. 7. Inlet installed at the bottom
After passing through the solar panel 1. Prevent temperature rise during sunshine by flowing over the surface. The media air is applied to panel 1. 8. Cool and flow {exit 9. Discharge more. (This quantity is controlled by a controller not shown).
1. Casing as shown in another embodiment It is also possible to bend from the top and flow down.

[0013] Casing 2. More outlet 9. The medium air led to the communication pipe 10. 11. Medium heating device that absorbs and recovers solar thermal energy through Heating device 1
2. In order to allow the transmission of incident light energy and to transfer heat energy to the medium, the upper and lower surfaces on which light is incident are formed of a good transmitting material (Ex. Glass or the like). 32. A black body fin that forms a medium passage inside as shown in the sectional view and is effective for holding and transferring heat. Is provided.
(Of course, it can be used without fins.)

Medium heating device 12. Is a solar panel 1.
Is mounted on the upper surface and heats up the medium after the panel is cooled. As shown in other practical examples, it is also possible to couple the solar panel depending on the heat capacity and the output, and connect and use the medium in parallel or in series so that the medium flows. Fig. 4-3. The panel can be cooled in parallel, and the medium heating device can be in series to obtain a high temperature medium.

The medium whose temperature has been heated and heated is taken out of a discharge pipe 14. 15. More circulating device (Ex. Blower) and discharge pipe 16.
Conduit 17. Through a heat storage tank 19. Heat exchange coil provided inside Heat exchange with other medium effective for heat utilization and heat storage at
Overheat and raise the temperature. Another embodiment FIG. 4-2. Can be directly introduced into the heat storage tank (Ex. Bathtub).

Circulating device 15. The heating medium that has exited the circulation pipe 20. Via the heating device 12. It is also possible to obtain an even higher temperature by returning to the inlet side of the tank and performing recirculation. A part of the medium air is directly introduced into the inlet pipe 21. The air is directly used effectively as room heating air.

The high-temperature heating medium (E) introduced into the heat storage tank
x. (Air) is the heating coil inside the tank. , Another medium (Ex. Water) circulating in the tank is heated and heated, stored in heat storage, and used for applications outside of sunshine hours.

Thermal storage tank 19. The other medium (Ex. Hot water) heated and heated in step 2 Through the medium transfer device 24. (Ex. Water pump). , Each use equipment, bathtub 28. Hot water shower 29. Heating heater 30. And absorption-type cooling device 31. Circulating pipe 26. Returning to the heat storage tank, it is reheated and reused, and the heat storage tank has a vent pipe 22. Is attached.

Transfer device 24. Return-side pipe for circulating water from the outlet of 26. A bypass pipe is also provided to stir the inside of the tank to make heat transfer effective.

[0020]

As described above, the following effects can be obtained in the hybrid solar system for simultaneously recovering the electric energy and the heat energy by the solar incident light.

The temperature rise of the panel in the process of converting the electromagnetic wave energy of sunlight into electric power causes the output to decrease as the temperature rises. According to the present system, the temperature rise is prevented by the cooling effect of the low temperature medium. The output can be prevented from lowering.

The solar panel is cooled using a medium (Ex. Air) using the radiant heat energy of the sun to suppress the temperature rise, and the medium is heated to a high temperature by a heat exchange device using a transparent material on the upper surface of the panel. In this case, the heat can be recovered, so that a total utilization efficiency of 50% or more can be obtained.

The high temperature retained heat of the medium after recovery of the thermal energy of the sun is converted into another medium (E) which is convenient for heat storage and utilization.
x. Water) and heat transfer in a heat storage tank.
x. Pumps) to ensure that they are applied to the purpose of each device used and that they are used effectively. From the viewpoint of the user, water is safe, has the largest heat capacity, has a small volume, is easy to handle and operate, has compact equipment, and is economically practical.

[Brief description of the drawings]

FIG. 1 shows a side view of a system system according to the present invention.

Fig. 2 仝 Top A plan view is shown.

FIG. 3 shows an upper sectional view.

FIGS. 4-1 to 3 show another embodiment.

FIG. 5 shows a typical example of a conventional solar cogeneration system.

[Explanation of symbols]

1. Solar panel 15. Medium circulation device
29. Refueling shower 2.仝 Upper caging 16.仝 Top discharge pipe
30. Heater 3. Power take-out cable 17.仝 Upper conduit
31. Cooler 4 Connection box 18.仝 Upper heat exchange coil
32. Black body fins 5. Inverter 19. Medium heat storage tank
18 'heat exchange nozzle Power distribution cable 20. Medium recirculation pipe ▲ A ▼
33 Medium pump 7. Cold medium inlet pipe 21.仝 Upper direct introduction pipe 8.仝 Intake entrance 22. Vent pipe 9.仝 Unloading outlet 23. Heat storage medium outlet tube B
▼ 10. Medium communication pipe 24.仝 Upper transfer device 11. Medium intake 25.仝 Top discharge pipe 12. Medium heating device 26.仝 Upper circulation pipe 14．仝 Top extraction pipe 28. Bathtub

Continued on the front page (72) Inventor Kenji Honda 16F term, 6 Kamizenza-cho, Nagasaki City, Nagasaki Prefecture 3L071 CC02 CD04 CE02 CF02 CF12 CJ01 5F051 JA18

Claims (2)

[Claims] 1. An electricity and heat cogeneration system combined with a solar panel for utilizing solar incident energy as electric power using a solar panel and recovering the thermal energy using a medium. In order to prevent the rise in humidity by introducing a low-temperature medium to cool the solar panel and to provide a medium heating device composed of a transparent body of incident light on the upper surface, to introduce the medium used for cooling and to raise the temperature, The heat energy of the incident light is recovered by the medium at a high temperature. In order to obtain a high temperature, a series flow of the medium, recirculation, etc. are also performed. 2. The high-temperature medium collected above is introduced into a heat storage tank surrounded by a heat insulating material, and heat exchange is performed with another heat utilization medium (one having a large specific heat and specific gravity and easy to handle). The heat utilization medium heated to a high temperature is conveyed to the equipment to be used by the transfer device to effectively use the heat, becomes low temperature, returns to the heat storage tank, and is heated again and circulated. The medium consumed for heat utilization is replenished by a medium pump.