CN203300681U - Photo-thermal integrated solar cell module - Google Patents

Abstract

The utility model discloses a high-power concentrating photovoltaic photothermal integrated solar cell module, which comprises: a high-efficiency multi-junction semiconductor compound solar cell; a receiver with a heat exchange device on the back; a concentrating optical system; and a liquid circulation system. The utility model can dissipate and collect the heat energy generated by the high-power concentration through the water circulation system while the concentrating multi-junction solar cell is generating power, which not only ensures the stability of the photovoltaic chip, prolongs the life of the chip, but also fully utilizes the heat energy, improving The utilization rate of solar energy.

Description

Photothermal integrated solar cell module

technical field

The utility model relates to a high-power concentrating photovoltaic photothermal integrated solar cell module, which belongs to the technical field of semiconductor materials.

Background technique

In the process of converting light energy into electrical energy, solar cells do not convert all light energy into electrical energy. Theoretical studies have shown that the theoretical physical limit of the conversion efficiency of solar cells made of unipolar single crystal silicon at 0 ^o C is 30%. Under the condition of constant light intensity, when the temperature of the silicon cell itself rises, the output power decreases. In practical applications, under standard conditions, the average efficiency of crystalline silicon is about 15%. That is to say, solar cells convert 15% of light energy into electrical energy, and the remaining 85% are converted into heat energy. Even the most efficient multi-junction semiconductor compound solar cells have an efficiency of no more than 45%. The energy lost is also greater than the electrical energy generated. In the conversion process, with the increase of heat energy, the temperature of the battery will continue to increase. In addition to the continuous decline in photoelectric conversion efficiency, the life of the solar battery itself will also be greatly shortened. In order to make the solar cell work normally and prolong the service life, the cooling device of the solar cell is widely used. However, the dissipated heat energy is also a part of the solar radiation energy absorbed by the solar cell module. If this part of the heat energy is taken out, collected and used instead of being regarded as harmful heat that needs to be dissipated, the purpose of making full use of energy can be achieved and broadened. The use function of the solar cell module.

Contents of the invention

The utility model provides an idea of combining two different types of solar power generation, photovoltaic and photothermal. If the heat generated by high-power concentration is not dissipated in time, the surface temperature of the battery chip will be too high, which will seriously affect the power generation efficiency and the life of the battery itself. Exchanging and collecting excess heat to make full use of all solar energy is one of the main directions for future solar power generation.

The specific scheme of the utility model is: a photothermal integrated solar cell module, including: a multi-junction semiconductor compound solar cell, a receiver with a heat exchange device on the back; a concentrating optical system, located above the solar cell; a liquid The circulation system is located below the solar cell, and guides the heat energy generated by the concentrated light of the cell into the circulating liquid to reduce the temperature of the cell.

Preferably, the multi-junction semiconductor compound solar cell has semiconductor materials with different band gap ratios superimposed to absorb sunlight in different wavelength ranges.

Preferably, the liquid circulation system introduces the heat energy generated by concentrated light into the circulating liquid to lower the temperature of the battery, and at the same time collects excess heat to increase the temperature of the liquid as a preheating stage for the liquid that drives the steam turbine to generate steam.

Preferably, the liquid circulation system has liquid flow conduits.

Preferably, said heat exchanging means is placed within the liquid flow conduit.

Preferably, the condensing optical system selects a Fresnel lens condensing mode.

Preferably, said liquid circulation system and photovoltaic circuit system are kept insulated.

The main innovations of the utility model include: 1. Simultaneous use of photovoltaic and photothermal solar power generation methods; 2. Improving the stability and life of the photovoltaic power generation battery chip; 3. Preheating before the heat is collected as liquid vaporization.

Description of drawings

Figure 1 shows a schematic diagram of the light-gathering optical system.

Fig. 2 shows a schematic structural diagram of a photovoltaic photothermal integrated solar cell including a thermal cycle system.

Fig. 3 is a top view of a photovoltaic photothermal integrated solar cell module implemented according to the utility model.

Each label in the figure means:

100 high-efficiency multi-junction solar cell chips

200 Concentrating optical system

201 secondary prism

202 Fresnel lens

300 binder

400 heat sink

500 receivers

600 liquid flow pipes.

Detailed ways

Details of the novel implementations will now be described, including exemplary inventions and examples of the novel implementations. See illustration and description below. The present invention will be further described below in conjunction with the examples, but the protection scope of the present invention should not be limited thereto.

Please refer to FIG. 2 , a photothermal integrated solar cell module, including: a high-efficiency multi-junction solar cell chip 100, a concentrating optical system 200, a heat sink 400, a receiver 500, and a liquid circulation system.

Wherein, the liquid circulation system has a liquid flow pipe 600 with a water inlet at one end and a water outlet at the other end.

A cooling fin 400 is installed on the back of the receiver 500 for heat exchange, and it is placed in the circulating cooling water of the liquid flow pipe 60 .

The high-efficiency multi-junction solar cell chip 100 can be patch mounted on the front of the receiver 500 through the adhesive 300, superimposed semiconductor materials with different band gap ratios, and absorbing sunlight in different wavelength ranges, such as GaInP/GaAs/Ge batteries, The multi-junction compound semiconductor solar cell epitaxial wafer can be prepared by the MOCVD system, and the chip process can be used to prepare the battery chip that meets the size requirements.

The concentrating optical system 200 includes a secondary prism 201 and a Fresnel lens 202, wherein the secondary prism 201 is bonded above the battery chip 100 by materials such as silica gel, and a certain distance above the prism 201 is equipped with a Fresnel lens 202, and the lens The focal length is equal to the distance from the chip to the lens, please refer to Figure 1.

Please refer to Figure 3, the lens and chipset are arranged according to the voltage and current requirements to form a module.

In this embodiment, the battery module uses both photovoltaic and photothermal solar power generation methods. The liquid circulation system can introduce the heat energy generated by the battery chip into the circulating liquid to reduce the battery temperature and improve the stability of photovoltaic power generation. The heat, raising the temperature of the liquid, acts as a preheating stage for the liquid that drives the steam turbine to generate steam.

Claims (8)

1. light-heat integration solar cell module comprises: many pn junction p ns compound solar cell, and the back side is with the receiver of heat-exchange device; Light-gathering optics, be positioned at the top of described solar cell; Fluid circulation system, be positioned at the below of described solar cell, and the heat energy that battery optically focused is produced imports circulating fluid to reduce battery temperature.

2. light-heat integration solar cell module according to claim 1, it is characterized in that: described battery modules is utilized photovoltaic and two kinds of solar power generation modes of photo-thermal simultaneously.

3. light-heat integration solar cell module according to claim 2, it is characterized in that: the heat energy that described fluid circulation system produces optically focused imports circulating fluid to reduce battery temperature, collect simultaneously waste heat, improve fluid temperature, as the warm-up phase of the liquid of pushing turbine generating steam.

4. light-heat integration solar cell module according to claim 1 is characterized in that: described many pn junction p ns compound solar cell has the semi-conducting material stack of different band gap proportionings, absorbs the sunlight of different wavelength range.

5. light-heat integration solar cell module according to claim 1, it is characterized in that: described fluid circulation system has liquid flow conduits.

6. light-heat integration solar cell module according to claim 4, it is characterized in that: described heat-exchange device is placed in liquid flow conduits.

7. light-heat integration solar cell module according to claim 1, is characterized in that: described fluid circulation system maintenance insulation.

8. light-heat integration solar cell module according to claim 1: it is characterized in that: described light-gathering optics is the Fresnel Lenses condenser system.

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