CN201349013Y - Photovoltaic cell radiating and combined heat and power system - Google Patents

Abstract

The utility model provides a photovoltaic cell radiating and combined heat and power system, which comprises a photovoltaic panel body, and is characterized by also comprising a radiating plate which has a hollow structure, wherein a great deal of Millipore pipe groups or microflute groups are arranged inside the cooling plate in the same direction; working substance is filled in the Millipore pipe groups or microflute groups; each Millipore or microflute is naturally formed a micro heat pipe structure; one end of the cooling plate is a heat absorbing end one side of which is attached to the back side of the photovoltaic panel, so as to evaporate and absorb the heat of the photovoltaic cell; the other end of the cooling plate is a heat releasing end which extends to the outside of the photovoltaic panel and exchanges heat with a heat exchanger so as to condense to release heat; and the heat exchanger outputs hot water after absorbing heat.

Description

Photovoltaic battery cooling and combined heat and power system

technical field

The utility model relates to a photovoltaic battery heat dissipation system, which can output hot water by using the radiated heat while the photovoltaic battery dissipates heat.

Background technique

The photoelectric conversion efficiency of general commercial photovoltaic cells (also known as solar cells) is 6% to 15%. During operation, most of the unused solar radiation energy is absorbed by the battery and converted into heat energy except for a part of it being reflected; if If the absorbed heat cannot be removed in time, the temperature of the battery will gradually rise, and the power generation efficiency will decrease (according to statistics, the output power will increase by 0.2% to 0.5% when the temperature of the battery module is lowered by 1K), and the photovoltaic battery will age rapidly if it works at high temperature for a long time. Shortened service life.

Concentrating photovoltaic power generation technology uses low-cost reflectors or lenses to reduce the use of some expensive photovoltaic cells. When photovoltaic cells work under low-power or even high-power light intensity, the effective output power per unit area is greatly increased, and the cost of power generation is greatly reduced. , but with the increase of the radiated light intensity of the battery panel per unit area, the heat absorbed also increases, and the temperature control and heat dissipation problems of the battery are also more prominent.

Currently, commonly used cooling methods for photovoltaic cells include: air cooling and water cooling.

Natural or forced convection of the air on the back of the photovoltaic cell removes heat to achieve the purpose of cooling. Although this method has a simple structure and good economy, the heat dissipation effect is poor.

A typical water cooling system consists of heat exchangers, water tanks, several connecting valves and other components. Although this method has high heat transfer efficiency, it has complex structure, high cost, and problems such as working fluid leakage and insulation.

Therefore, how to dissipate heat safely, efficiently, and at low cost has become a key technical problem to accelerate the practical application of photovoltaic cells for power generation.

Moreover, the existing heat dissipation technologies for photovoltaic cells all directly discharge the heat accumulated on the photovoltaic cells to the outside without further utilization, wasting a large amount of energy in vain.

Utility model content

The purpose of the utility model is to provide a photovoltaic cell heat dissipation and combined heat and power supply system which can recycle the heat released by the photovoltaic cell to provide hot water.

The technical scheme of the utility model is as follows:

A photovoltaic cell heat dissipation and combined heat and power system, including the photovoltaic battery panel itself, characterized in that: it also includes a heat dissipation plate, the heat dissipation plate is a hollow structure, and a large number of microporous tube groups or microgroove groups are arranged in the same direction inside it , and filled with working fluid, each micropore or microgroove naturally forms a micro heat pipe structure, one end of the heat dissipation plate is a heat-absorbing end, and one side of the heat-absorbing end is attached to the back of the photovoltaic cell panel to evaporate and absorb the energy of the photovoltaic cell The other end is the heat release end, and the heat release end extends to the outside of the photovoltaic cell panel and exchanges heat with a heat exchange device to condense and release heat. The heat exchange device absorbs heat and outputs hot water.

The heat exchange device is a water container, on which a water inlet and a water outlet for outputting hot water are arranged, and the heat release end of the heat dissipation plate is located in the inner water body of the water container.

The technical effect of the utility model is as follows:

The heat dissipation plate of the utility model has a large number of microporous tubes or micro groove structures inside, combined with the working fluid filled in the plate, each microporous tube or micro groove can naturally form a micro heat pipe structure, so the plate can be formed A large number of micro-heat pipe group structures, due to the high heat exchange efficiency of the heat pipes, using the heat dissipation plate to fit the photovoltaic panel, can achieve efficient and rapid absorption of heat accumulated on the photovoltaic panel and reduce the temperature of the photovoltaic panel , to achieve the purpose of efficient heat dissipation and cooling; one end of the heat dissipation plate exchanges heat with the heat exchange device, on the one hand, it condenses and releases heat on the micro heat pipe group of the heat dissipation plate, and on the other hand, the heat exchange device absorbs heat and outputs hot water for people to use.

Compared with the existing photovoltaic battery panel heat dissipation technology, the photovoltaic battery heat dissipation and combined heat and power supply system of the utility model adopts a flat plate structure, which is not only simple in structure, but also easy to install, especially in various installation methods of battery panels. The utility model has good adaptability, and can also reuse the heat transmitted by the battery board to provide hot water for people. The utility model has the characteristics of energy saving, environmental protection, economy and high efficiency.

Description of drawings

Accompanying drawing 1 shows the structural representation of the photovoltaic cell heat dissipation and cogeneration system of the present utility model;

Accompanying drawing 2 shows the schematic diagram of the internal section of the heat dissipation plate.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

FIG. 1 is a schematic structural diagram of a photovoltaic cell heat dissipation and cogeneration system of the present invention. It includes a photovoltaic cell panel 1 and a heat dissipation plate 2. One end of the heat dissipation plate 2 is attached to the back of the photovoltaic cell panel 1 as a heat absorbing end, and the other end extends outward from the bottom of the photovoltaic cell panel 1 to form a heat release end 3. The heat release end 3 is arranged in the water tank 6.

The internal structure of heat dissipation plate 2 is shown in accompanying drawing 2. The interior of the plate 2 is distributed and divided into a large number of microporous tubes 9, and the microporous tubes 9 may also adopt a microgroove structure. A certain amount of working fluid is filled in the plate 2, and the working medium is evenly distributed on the heat-absorbing end part of each microporous tube 9, and each microporous tube 9 naturally forms a relatively independent micro heat pipe structure, and the whole plate 2 is a total The heat pipe structure, using the high-efficiency heat transfer characteristics of the heat pipe, combined with the flat plate structure, can effectively solve the problem of poor heat dissipation of existing photovoltaic cells, reduce the operating temperature of photovoltaic cells, improve the power generation efficiency of photovoltaic cells, and reduce the cost of solar power generation. cost.

The working medium at the endothermic end absorbs the heat of the photovoltaic cell panel 1 and evaporates to form steam. The steam releases heat and condenses in the cooling water in the water tank 6 through the exothermic end 3 and flows back to the endothermic end to form a circulation loop.

The cooling water in the water tank 6 absorbs the condensation heat of the heat release end 3 and is heated to raise the temperature, and outputs hot water through the water outlet 7 , and the water tank 6 also includes a water inlet 8 .

Claims (2)

1. a photovoltaic cell dispels the heat and cogeneration system, comprise photovoltaic battery panel itself, it is characterized in that: comprise that also heat radiation is dull and stereotyped, described heat radiation flat board is a hollow structure, its inside is provided with a large amount of micropore nest of tubes or microflute group in the same way, and be filled with working medium, each micropore or microflute form the micro heat pipe structure naturally, the dull and stereotyped end of described heat radiation is a heat absorbing end, one side and the photovoltaic battery panel back side of heat absorbing end fit, and with the heat of evaporation absorption photovoltaic cell, the other end is a release end of heat, release end of heat extends to the outside of photovoltaic battery panel and carries out heat exchange with the condensation heat release with a heat-exchanger rig, described heat-exchanger rig heat absorption back output hot water.

2. a kind of photovoltaic cell heat radiation as claimed in claim 1 and cogeneration system, it is characterized in that: described heat-exchanger rig is a water receptacle, it is provided with the delivery port of water inlet and output hot water, and the release end of heat of described heat radiation flat board is arranged in the inside water body of this water receptacle.

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