Solar heat pump system based on phase change heat storage and heat pipe heat transfer

Abstract

The invention provides a solar heat pump system based on phase change heat storage and heat pipe heat transfer. The solar heat pump system comprises an expansion valve, a compressor, a condenser, a solar heat collection evaporator, heat pipes and an energy accumulator; the solar heat collection evaporator comprises a evaporator body and solar radiation plates, wherein the solar radiation plates form a box body structure, the evaporator body is located in the box body structure, and the box body structure is internally filled with a liquid medium and is used for storing heat energy absorbed by the solar radiation plates in a liquid medium; the evaporator body is connected to the compressor, the condenser and the expansion valve in sequence through pipelines to form a closed loop; one ends of the heat pipes are inserted into the box body structure, and the other ends of the heat pipes are inserted into the energy accumulator; and the heat pipes are closed metal pipes, and the interiors of the heat pipes are filled with a phase change material. According to the solar heat pump system, the evaporation temperature of a heat pump can be improved, the frosting problem in the heating process of an air source heat pump in winter can be solved, and the heat transfer efficiency in the the energy storage and energy release processes of the phase change material can be improved.

Description

technical field [0001] The invention relates to the field of air conditioning and the field of solar energy application, in particular to a solar heat pump system based on phase change heat storage and heat pipe heat transfer. Background technique [0002] At present, the problem of global energy depletion and environmental pollution is becoming more and more serious. Energy has become the lifeblood of economic development, and no country in the world can maintain a steady rise in national strength when energy supply is insufficient. China is the world's largest developing country and the world's second largest energy consumer. China's per capita energy consumption is also rising. In 1953, China's per capita energy consumption was 0.09 tons of standard coal. In 2005, China's per capita energy consumption The volume is 1.71t standard coal, and by 2016 this figure has reached 3.16t. In the process of continuous industrialization and urbanization, energy issues are becoming m...

AI Technical Summary

Problems solved by technology

Problems in this system: the structure is relatively complex, the process is difficult to realize, and the cost is high. For the energy storage process of phase change materials, the efficiency of the energy discharge process is low, and frosting is easy to occur when the air source heat pump is heating in winter.

Problems in this system: direct addition of phase change materials, incompatibility between media, and corrosion of phase change materials make it technically difficult to add phase change materials to the original system;

These three systems have great similarities. The problem is that the efficiency of energy storage and energy discharge is not high, and the amount of heat stored in the system is limited by the size of the evaporator.

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