Thermoelectric coupling utilization solar system and method

Abstract

The invention discloses a thermoelectric coupling utilization solar system which comprises a photovoltaic panel evaporator, a compressor, a condensation heat exchanger, a throttling expansion valve, a heat storage water tank and a water pump, wherein the photovoltaic panel evaporator comprises a solar cell panel, a metal bottom plate and a medium pipeline. The photovoltaic panel evaporator is sequentially connected with the compressor, the condensation heat exchanger and the throttling expansion valve to form a heat pump circulating loop; and the water pump, the condensation heat exchanger and the heat storage water tank are sequentially connected in series through a main water pipe to form a hot water channel. According to the thermoelectric coupling utilization solar system disclosed by the invention, the metal bottom plate of a photovoltaic panel is directly used as an evaporator, waste heat of a photovoltaic solar cell is utilized to increase the heat exchange temperature of the evaporator, and evaporation related heat absorption of the heat pump evaporator is utilized, so that the temperature of the heat pump evaporator is increased, and a utilization temperature region for waste heat of a photovoltaic system is increased, so that the comprehensive utilization efficiency of solar energy is improved, and therefore, the thermoelectric coupling utilization solar system has a very good application prospect.

Description

technical field [0001] The invention relates to solar photovoltaic and heat pump technologies, in particular to a system and method for utilizing solar energy through thermoelectric coupling. Background technique [0002] Solar energy is a kind of renewable energy with abundant reserves. Improving the use of solar energy is of positive significance for reducing the pollution of fossil energy and coping with the global energy crisis. [0003] At present, the utilization of solar energy mainly includes the forms of solar power generation and solar thermal utilization. Solar power mainly adopts two forms of photovoltaic and photothermal. Among them, for the photovoltaic solar power generation system, the photoelectric conversion efficiency is currently only about 20%. Therefore, most of the solar energy is still lost in the form of heat and reflection, and has not been fully utilized effectively. In order to improve the solar energy utilization efficiency of the photovoltaic ...

AI Technical Summary

Problems solved by technology

In order to improve the solar energy utilization efficiency of the photovoltaic power generation system, the PVT system has been proposed in recent years, that is, the photovoltaic photothermal system, which uses the waste heat of the photovoltaic panel as a heater for hot water to generate hot water. Due to the limitation of the operating temperature of the photovoltaic panel, The temperature of hot water will not be too high, and its availability is also limited. Moreover, in seasons and nights when the temperature is low, the hot water produced is not available due to the low temperature of the photovoltaic panels.

In order to further improve the grade of hot water, some studies have proposed to use the low-grade hot water obtained from the heat exchange of photovoltaic panels as the heat source of the heat pump system, and use the heat pump system to generate hot water at a higher temperature to improve the efficiency of the entire system and heat water grade, but this kind of system structure is relatively complicated and not suitable for a single user

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