CN203895479U - Solar-energy combined heat and power generation system - Google Patents

Description

Solar cogeneration system

technical field

The utility model belongs to the technical field of solar energy application, in particular to a solar heat and power cogeneration system.

Background technique

Solar energy is a clean and renewable new energy source, which is more and more popular among people and has a wide range of functions in people's life and work. Among them, the solar cogeneration system is composed of photovoltaic power generation unit and heat collection unit, which can generate heat at the same time. Electric energy and thermal energy, through the integrated utilization of solar energy in all bands, can greatly improve the comprehensive utilization efficiency and economy of solar energy, and can well reduce the cost of photovoltaic power generation, save the area of solar cells used, and reduce the overall cost of solar panel production in my country. Energy consumption and pollution play an important role in the large-scale application and promotion of solar energy and resource conservation. After a long-term experimental test on solar panels, it is found that during the process of generating electricity in the solar power generation system, the temperature on the surface of the solar panel rises above 50°C, which will directly lead to a decrease in the conversion efficiency of the solar panel, thereby causing the power generation efficiency of the entire system to decrease. In summer, if the temperature reaches above 65°C, the system efficiency will drop sharply. Therefore, in the existing solar heat and power cogeneration system, generally, a water heating device is added on the back plate of the solar panel of the photovoltaic power generation unit, and the effect of heat transfer is used to reduce this effect.

However, in practical applications, this structure tends to cause uneven local temperature distribution, which does not have much positive effect on improving power generation efficiency. In addition, the solar panel of the existing photovoltaic power generation unit and the heat exchanger of the heat collection unit are connected by heat exchange medium pipes, and the distance between the two is relatively long, resulting in large heat loss, low heat exchange efficiency, Problems such as slow speed affect the application of solar cogeneration systems in real life.

Utility model content

The purpose of the utility model is to provide a solar heat and power cogeneration system with high power generation efficiency and high heat exchange efficiency.

The solar heat and power cogeneration system provided by the utility model includes an ultra-clear tempered glass panel, a solar cell, a heat exchanger and a water pipe. The heat exchanger includes a working medium evaporation tube and a working medium condensation chamber. The system also includes an oxidation Aluminum ceramic heat-conducting layer, heat-conducting silica gel, heat-insulating layer and packaging board, the ultra-clear tempered glass panel is packaged and fixed on the packaging board, the solar cell is installed on the inner side of the ultra-white tempered glass panel, and the alumina ceramic heat-conducting layer is installed On the inner side of the solar cell, the working fluid evaporating tube adopts a grid shape, and the working fluid evaporating tube and the working fluid condensation chamber are horizontally attached to the inner surface of the alumina ceramic heat-conducting layer through the heat-conducting silica gel, and the heat-insulating layer is filled in Between the alumina ceramic heat conduction layer around the heat exchanger and the packaging plate, the water pipe is horizontally installed in the working fluid condensation chamber and its ends pass through the working fluid condensation chamber and the insulation layer and placed outside the packaging plate. The low-temperature inlet of the evaporating pipe is connected with the working medium condensation chamber on the water outlet side of the water pipe, and the high-temperature outlet of the working medium evaporating pipe is connected with the working medium condensing chamber on the water inlet side of the water pipe. A working fluid addition port is provided on the working fluid condensation chamber on the side of the water outlet.

In order to make the utility model more conducive to the balanced absorption of heat by the working fluid and the uniform heat dissipation of the battery sheet, the diameter of the tubes around the outer ring of the working fluid evaporation tube is larger than the diameter of the vertical tubes in the middle.

In order to promote the internal circulation of the heat exchanger of the present invention, the pipeline connected to the low-temperature inlet of the working medium evaporator tube is directly connected to the lower end of the packaging plate.

In order to make the utility model thinner and lighter in weight, the working fluid condensation chamber adopts a flat shape,

In order to increase the heat absorbed by the working fluid in the heat exchanger of the present invention, the cold water in the water pipe can be quickly heated, and several heaters are evenly welded on the outer wall of the water pipe.

In order to avoid adding excessive resistance to the circulating flow of the working fluid, the heat booster adopts a fan shape.

The utility model installs the heat exchanger inside the solar battery, installs the water pipe in the heat exchanger, injects the working medium from the working medium adding port, injects cold water into the water pipe, the solar battery absorbs sunlight and heats up, and the heat energy passes through the alumina ceramics The heat-conducting layer and heat-conducting silica gel are transferred to the working fluid evaporating tube, which makes the internal working fluid absorb heat and heat up. The cold water in the water pipe absorbs the heat of the working medium and causes the temperature of the working medium in the working fluid condensation chamber to drop, so that the closed working medium evaporating tube An internal circulation is formed in the middle to realize the flow of the working fluid and then perform heat exchange. The utility model integrates heat exchangers, not only solves the problem of low power generation efficiency due to high surface temperature of solar cells, but also greatly improves heat exchange efficiency, reduces heat loss, and saves space.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a schematic rear view partial structure diagram of FIG. 1 .

Fig. 3 is a schematic diagram of the structure at A-A in Fig. 2 .

Detailed ways

As can be seen from Figures 1 to 3, the solar cogeneration system of the utility model includes an ultra-clear tempered glass panel 1, a solar cell 2, an alumina ceramic heat-conducting layer 3, a heat-conducting silica gel 4, a heat exchanger 5, a thermal insulation Layer 6, packaging plate 7 and water pipe 8, wherein the heat exchanger 5 includes a working fluid evaporation tube 51 and a working fluid condensation chamber 52 arranged perpendicularly to each other, the solar cell 2 includes a junction box 21 installed at the bottom of the packaging plate 7, and is made of ultra-white steel The glass panel 1 is packaged and fixed on the inner and outer end surface of the packaging plate 7, the solar cell 2 is installed on the inner side of the ultra-clear tempered glass panel 1, the alumina ceramic heat conduction layer 3 is installed on the inner side of the solar cell 2, and the working fluid evaporation tube 51 is integrated into a grid grid shape, the working medium evaporating tube 51 and the working medium condensation chamber 52 are horizontally attached to the inner surface of the alumina ceramic heat conducting layer 3 through the heat conducting silica gel 4, and the heat preservation layer 6 is filled with the alumina ceramic heat conducting layer 3 around the heat exchanger 5 and Between the packaging plates 7, the water pipe 8 is horizontally installed in the working fluid condensation chamber 52, and the water inlet and outlet ends of the water pipe 8 respectively pass through the working fluid condensation chamber 52 at each end, the insulation layer 6 and the packaging board 7, and are placed in the packaging On the outside of the plate 7, the low-temperature inlet 511 of the working fluid evaporation tube 51 is connected with the working fluid condensation chamber 52 on the water outlet side of the water pipe 8, and the high-temperature outlet 512 of the working fluid evaporation tube 51 is connected with the working fluid condensation chamber 52 on the water inlet side of the water pipe 8 A working medium addition port 53 is provided on the working medium condensation chamber 52 at the water inlet side of the water pipe 8 .

It can also be seen from Fig. 1 and Fig. 2 that the diameter of the pipes located around the outer ring of the working fluid evaporating tube 51 of the utility model is greater than the diameter of the vertical pipes in the middle, and the working medium evaporating tube 51 is connected to the low temperature inlet of the working medium evaporating tube 51. The pipeline 513 leads directly to the lower end of the packaging board 7, and the working fluid condensation chamber 52 adopts a flat shape.

It can also be seen from Fig. 1 to Fig. 3 that several heaters 81 are uniformly welded on the outer wall of the water pipe 8 of the present invention, and the heaters 81 are fan-shaped arranged on the outer wall of the water pipe 8 .

In the present utility model, the solar cell 2 can adopt monocrystalline silicon, polycrystalline silicon or amorphous silicon.

In the present utility model, both the working fluid evaporation tube 51 and the water tube 8 are copper tubes. the

The heat exchange principle of the present utility model is as follows:

1. Fill the working fluid evaporation tube 51 and the working fluid condensation chamber 52 with working fluid from the working fluid addition port 53 of the heat exchanger 5 and then close the working fluid addition port 53 to form a closed working fluid circuit.

2. Turn on the switch in the junction box 21 to make the solar battery 2 work, and inject cold water from the water inlet of the water pipe 8 .

3. As the solar cell 2 absorbs light and heats up, the heat generated by it will be transferred to the working fluid evaporation tube 51 through the alumina ceramic heat conducting layer 3 and the heat conducting silica gel 4, so that the working fluid in the working fluid evaporating tube 51 and the working fluid condensation chamber 52 Endothermic heating.

4. The heat energy in the working fluid is transferred to the cold water in the water pipe 8 through heat, so that the cold water absorbs heat and heats up and becomes hot water to flow out from the water outlet of the water pipe 8; at the same time, the working fluid in the working fluid condensation chamber 52 is sucked away The heat causes the temperature of the working fluid inside to drop, thereby forming an internal circulation as shown in Figure 1 in the closed working medium circuit to realize the flow of the working medium.

When the utility model is used, when the sunlight is sufficient, the user can immediately use the hot water in the water pipe 8, or store the hot water in the water pipe 8 through an external water storage device.

When the utility model is used, water is injected into the water pipe 8. When the whole system is running, the user can sample the temperature of the water outlet of the water pipe 8 according to his own needs, and realize the power generation efficiency and waste heat of the solar cell by controlling the outlet flow rate. The purpose of utilizing the efficiency balance.

Claims (6)

1. a solar cogeneration system, comprise ultrawhite toughened glass panel (1), solar cell (2), heat exchanger (5) and water pipe (8), described heat exchanger (5) comprises working medium evaporation tube (51) and working medium condensation chamber (52), it is characterized in that: this system also comprises aluminium oxide ceramics heat-conducting layer (3), heat conductive silica gel (4), heat-insulation layer (6) and package board (7), described ultrawhite toughened glass panel (1) surrounding is fixed in package board (7), described solar cell (2) is arranged on the inner side of ultrawhite toughened glass panel (1), described aluminium oxide ceramics heat-conducting layer (3) is arranged on the inner side of solar cell (2), described working medium evaporation tube (51) adopts lattice-shaped, described working medium evaporation tube (51) and working medium condensation chamber (52) are close to the inner surface of aluminium oxide ceramics heat-conducting layer (3) by heat conductive silica gel (4) level, described heat-insulation layer (6) is filled between the aluminium oxide ceramics heat-conducting layer (3) and package board (7) of heat exchanger (5) surrounding, described water pipe (8) is laterally arranged in working medium condensation chamber (52) and its each end is placed in outside package board (7) through this working medium condensation chamber (52) and heat-insulation layer (6), the low temperature import (511) of described working medium evaporation tube (51) is connected with the working medium condensation chamber (52) of described water pipe (8) delivery port side, the high temperature outlet (512) of described working medium evaporation tube (51) is connected with the working medium condensation chamber (52) of described water pipe (8) water inlet side, on the working medium condensation chamber (52) of described water pipe (8) water inlet side, be provided with working medium and add mouthful (53).

2. solar cogeneration system according to claim 1, is characterized in that: the pipe diameter of vertical setting of types in the middle of the pipe diameter of the outer ring surrounding of described working medium evaporation tube (51) is greater than.

3. solar cogeneration system according to claim 1, is characterized in that: the pipeline (513) that described working medium evaporation tube (51) is connected with its low temperature import passes straight through to the lower end of package board (7).

4. solar cogeneration system according to claim 1, is characterized in that: described working medium condensation chamber (52) adopts flat.

5. solar cogeneration system according to claim 1, is characterized in that: on described water pipe (8) outer wall, uniform welding has some heat boosters (81).

6. solar cogeneration system according to claim 5, is characterized in that: described heat booster (81) adopts fan-shaped.