A three-purpose ground source absorption heat pump system and its operating method

Abstract

A three-purpose ground source absorption heat pump system and its operation method, the system includes an absorption heat pump, an underground pipe, a domestic hot water tank, a plate heat exchanger, a switching pump and a plurality of valves. This method is based on the combination of fuel combustion heating system and ground source absorption heat pump, and adds a heat recovery loop and switching device to provide heating in winter, air conditioning in summer and domestic hot water throughout the year. According to the load characteristics of different seasons and different needs, a variety of different operating modes can be realized by switching. While cooling in summer, the exhaust heat of the absorber and / or the condenser is recovered to produce domestic hot water. Compared with electric heat pumps, absorption heat pumps take less heat from the soil when heating, and dissipate more heat to the soil when cooling, while the demand for domestic hot water throughout the year can further increase the heat taken, and heat recovery in summer can further reduce emissions. Therefore, it can effectively reduce the annual thermal imbalance rate, improve the primary energy efficiency of traditional systems, and maintain stable and reliable heating and air conditioning performance for many years.

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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