Heat pipe photovoltaic hot water composite system combined with thermoelectric plate

Abstract

The invention relates to a heat pipe photovoltaic hot water composite system combined with a thermoelectric plate. The system comprises a whole-plate photovoltaic hot water module, a semiconductor double-layer heat exchange header, a photovoltaic and electric power control system and a water tank. The double-layer heat exchange header comprises two layers, i.e., a direct heat exchange layer and asemiconductor heating layer. On a clear day, circulating water flows through the direct heat exchange layer and the semiconductor heating layer, hot water is produced, the temperature of a photovoltaic cell is reduced and the photoelectric conversion efficiency is increased. On a somber day, the circulating water only flows through the semiconductor heating layer; the thermoelectric plate works; the water temperature is obviously raised by the heat pump effect of the thermoelectric plate; compared with the output of the hot water of a common PV (photovoltaic) / T (temperature) system, the output of the hot water is greatly increased; the temperature of the photovoltaic cell is lower and the photoelectric conversion efficiency is higher. The invention has the characteristic that the heat pipe photovoltaic hot water composite system can be miniaturized. The relationship between electric power and the output of the hot water can be regulated according to the weather and the requirement. The utilizing efficiency and the quality of solar energy are improved. Meanwhile, the dependence on an external power supply is reduced and the application range of the system is enlarged.

Description

technical field [0001] The invention relates to a heat pipe type photovoltaic hot water composite system combined with a thermoelectric sheet, which belongs to a solar photovoltaic photothermal comprehensive utilization device and is used in the field of solar energy utilization. Background technique [0002] Solar energy is a clean, efficient and inexhaustible new energy source, so the governments of all countries regard the utilization of solar energy resources as an important content of the national sustainable development strategy. As an effective means to overcome the shortcomings of a single utilization method and improve the utilization efficiency of solar energy, the comprehensive utilization technology of solar photoelectricity and heat is developing in a diversified direction. Usually the efficiency of photovoltaic cells is less than 15%, and the rest of the solar energy is converted into heat and released, resulting in a decrease in the photoelectric conversion ef...

AI Technical Summary

Problems solved by technology

The effect of compression heat pump is better, but due to frequent start-up and high instantaneous power, it has high requirements on system circuit control and battery, and usually consumes high power, so it is not suitable for small-scale systems.

[0004] CN101908573A discloses an integrated solar photovoltaic photothermal panel, and CN201498524U discloses a solar photovoltaic photothermal integrated component. In both methods, photovoltaic cells and heat collecting devices are arranged separately, and the heat transfer effect is affected

CN1959299A discloses a photovoltaic solar heat pump multifunctional integrated system, the system uses a compression heat pump, and cannot produce hot water when the compressor is not working

Therefore, the efficiency of the existing photovoltaic water heating system is low under the condition of low solar irradiation, and there is no patent on the comprehensive utilization of solar energy that can adjust the relationship between electricity and hot water production.

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