Novel double-source heat pump system utilizing phase-change energy storage technology

Abstract

The invention discloses a novel double-source heat pump system utilizing a phase-change energy storage technology. The double-source heat pump system is characterized in that a unit shell is divided into an air source side closed cavity and a ground source side closed cavity through a partition plate; a fin heat exchanger is fixed in the air source side closed cavity; multiple groups of paraffin packaging pipes are fixed in a phase-change energy storage water tank; an outlet of a compressor is connected with a first inlet of a four-way valve through a refrigerant pipeline; a first outlet of the four-way valve is connected with a refrigerant inlet of a user side condenser through a refrigerant pipeline; a refrigerant outlet of the user side condenser is connected with an inlet of a liquid distributor through a refrigerant pipeline; an outlet of the liquid distributor is connected with refrigerant inlets of an air source side evaporator and a ground source side evaporator through refrigerant pipelines; a throttling valve is installed on a refrigerant pipeline on the back part of the liquid distributor; and an outlet of a liquid storage device is connected with an inlet of a compressor through the refrigerant pipeline. The double-source heat pump system has the advantages of good stability, high efficiency and good continuity.

Description

technical field [0001] The invention belongs to the technical field of dual-source heat pumps, and in particular relates to a novel dual-source heat pump system utilizing phase change energy storage technology. Background technique [0002] In order to continuously improve the living environment of human beings and increase the utilization rate of renewable energy, China and the rest of the world are paying more and more attention to the research of renewable energy technology. As one of the energy-saving technologies, heat pumps have received widespread attention from all over the world. Among them, air source and soil source are the most widely used, because these two types of heat pumps are easy to use and produce no pollution. They are the inevitable trend of my country's future development. However, due to the limitation of climatic conditions, the promotion of air source and ground source heat pumps in severe cold and cold areas is greatly restricted. [0003] At pres...

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Problems solved by technology

However, due to the limitation of climatic conditions, the promotion of air source and ground source heat pumps in severe cold and cold areas is greatly restricted.

[0003] At present, the traditional dual-source heat pump system, in the heating mode, adopts the air source heat pump for heating, which is affected by the temperature difference between day and night. There is a phenomenon that the heat pump provides excess heat during the day and insufficient heat supply at night when the outside temperature drops, and cannot fully utilize the ultra-low temperature. Advantages of air energy heat pump heating. If the ambient temperature is too low and the heating load is high, it is uneconomical to use air energy. At this time, it is necessary to start the soil source as the heat source

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