A heat pump energy storage system for smoothing short-term fluctuations of intermittent energy sources

Abstract

The invention discloses a heat pump energy storage system for stabilizing intermittent and short-term energy fluctuation. The system involves a water tank energy storage-energy taking unit; the watertank energy storage-energy taking unit comprises a hot water tank and a cold water tank, wherein the hot water tank is connected with a floor heating hot water unit and a domestic hot water unit; thehot water tank is further connected with a heat recovery condenser unit, wherein the heat recovery condenser unit is connected with a double-evaporator unit through a variable-frequency compressor andan expansion valve, and the double-evaporator unit is connected with the cold water tank; the cold water tank is connected with an indoor air conditioning unit; and the heat pump energy storage system further comprises a control unit, wherein the control unit is connected with the indoor air conditioning unit, the water tank energy storage-energy taking unit, the double-evaporator unit, the heatrecovery condenser unit and the variable-frequency compressor. According to the system, the problem of absorbing short-term and intermittent renewable energy fluctuation is solved, and meanwhile, therefrigerating and heating efficiency of the heat pump system under the fixed working condition is improved.

Description

technical field [0001] The invention relates to a heat recovery heat pump system, in particular to a heat pump energy storage system for smoothing short-term fluctuations of intermittent energy sources. Background technique [0002] Since the use of traditional energy will cause environmental problems such as greenhouse effect and air pollution, the use of clean energy such as photovoltaic power generation is increasing significantly. At present, powering household appliances and other electrical appliances in daily life through photovoltaic power generation has become one of the utilization methods. [0003] As a high-efficiency energy-saving device that makes full use of low-grade heat energy, the heat pump can make heat flow from low-temperature objects to high-temperature objects through reverse circulation, consume a small amount of mechanical work, and obtain greater heat, which can effectively convert low-grade heat energy that is difficult to apply Use it to achieve...

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Problems solved by technology

[0007] Purpose of the invention: The purpose of the invention is to provide a heat pump energy storage system that stabilizes the short-term fluctuations of intermittent energy sources, which solves the problems of low short-term photovoltaic power utilization, low cooling and heating efficiency, and large energy consumption in the prior art. The problem

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