Energy storage type efficiency air source heat pump heating system and method

Abstract

The invention discloses an energy storage type efficiency air source heat pump heating system and method. The system comprises an energy storage subsystem, an air pre-heater, a power transmission anddistribution subsystem and an air source heat pump. The energy storage subsystem is formed by sequentially communicating an air compressor, a heat storage/heat exchange device, an air storage chamber,a heat regenerator, a heater and a turbo expander, the turbo expander is connected with a power generator, the power generator is connected with an air source heat pump motor through the power transmission and distribution subsystem, a heat storage/heat exchange device water drainage opening is communicated with an air pre-heater water inlet, and an air pre-heater water drainage opening is communicated with a heat storage/heat exchange device water inlet through a circulation pump. Power grid low ebb electricity at night can be converted into air pressure energy to be stored, meanwhile, compression heat is used for preheating air at an air source heat pump inlet so as to improve heat pump energy efficiency at the lower temperature at night, in the electricity using high peak period in thedaytime, the stored air pressure energy is conveyed into electric energy to drive the air source heat pump, the running electric fees of the air source heat pump can be effectively reduced, and the problem that the energy efficiency of the air source heat pump is not high in the low-temperature environment at night can be solved.

Description

technical field [0001] The invention relates to the technical field of clean heating, in particular to an energy storage type high-efficiency air source heat pump heating system and method. Background technique [0002] The energy storage heating technology currently used is mainly thermal storage electric boilers, which heat the thermal storage medium (water or solid material) to a certain temperature to store heat by using the low-peak electricity at night, and use the stored heat during the flat power period and peak power period heating. As a result, the cost of electric heating can be greatly reduced, but the thermal storage electric boiler only uses the difference in peak and valley electricity prices, which does not have energy-saving benefits. If the heat dissipation loss of the thermal storage medium is included, its electrothermal conversion efficiency is lower than that of ordinary electric boilers. [0003] The air source heat pump is driven by electric energy a...

AI Technical Summary

Problems solved by technology

However, the current air source heat pump technology still has the following problems: 1) The energy efficiency is greatly affected by the ambient air temperature

In addition, in the environment below 0°C, the evaporator is severely frosted and needs to be defrosted continuously. Once this happens, the COP value will even be lower than 1, so that it cannot operate

2) Not suitable for use with existing heat storage technologies

The air source heat pump can only produce hot water at about 60°C. Due to the low temperature and low energy density, if it is used as heat storage, the capacity of the heat storage medium is huge and the economy is poor.

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