Three-purpose ground source absorption heat pump system and operation method

Abstract

Disclosed are a three-purpose ground source absorption heat pump system and an operation method. The system comprises an absorption heat pump, a buried pipe, a domestic hot water tank, a plate heat exchanger, a switching pump and a plurality of valves. According to the method, a fuel combustion based heat supply system is combined with the ground source absorption heat pump, a heat recovery loop and a switching device are added, and heating in winter, air conditioning in summer and year-round domestic hot water are provided. According to load characteristics of different seasons and different demands, various different operation modes are realized through switching. While cooling in summer, discharged heat of a heat absorber and (or) a condenser is recovered for making domestic hot water. Compared with an electric heating pump, the absorption heat pump has the advantages that heat extracted from soil during heating is small in amount, heat discharged to the soil is large in amount during cooling, heating extraction amount is further increased by the demand for the year-around domestic hot water, and discharged heat amount can be further decreased by heat recovery in summer, so that year-around heat unbalance rate can be effectively reduced, primary energy efficiency of a conventional system can be improved, and stable and reliable heat supply and air conditioning performance can be maintained all the year around.

Description

technical field [0001] The invention relates to a three-purpose ground source absorption heat pump system and an operation method, belonging to the field of heating and air conditioning. This technology can not only improve the primary energy efficiency of the traditional system, but also maintain stable and reliable heating and air conditioning performance for many years. It is especially suitable for heating in winter, air conditioning in summer, domestic hot water supply throughout the year, and areas with sufficient fuel supply. Background technique [0002] Northern cities and towns mainly adopt the centralized heating method based on fossil fuel combustion, which results in large energy consumption due to low overall energy efficiency, and is accompanied by a large amount of polluting gas and inhalable particulate matter emissions. Ground source heat pump system has been more and more widely used as a clean and efficient way of heating and air conditioning. However, w...

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Problems solved by technology

This problem can be alleviated by increasing the spacing of buried pipes or the number of buried pipes, but it requires a large land area and investment in buried pipes, and cannot fundamentally reduce thermal imbalance

The composite ground source heat pump system with the boiler as the auxiliary heat source is a feasible solution, but the use of the boiler reduces the advantages of the ground source heat pump to a certain extent; Boiler + small ground source heat pump system

However, the composite ground source heat pump system combined with solar energy has poor reliability and requires a large installation space and initial investment.

[0003] How to effectively solve the problem of low energy efficiency and high pollution in the heating mode based on fuel combustion in the north, as well as the thermal imbalance of traditional ground source heat pumps in the cold regions of the north, is of great significance to energy conservation and emission reduction in the construction field

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