Geothermal Heat Pump System Introduction

Geothermal heat pump system is the use of underground rock soil as the stability of the regenerator, the use of heat pump principle to realize the winter heat cold storage, cold storage in summer hot closed circulation system. Geothermal heat pump system is generally composed of three parts: the earth heat exchanger, the heat pump unit and air conditioner. The heat pump system is the key to the earth heat exchanger design and construction. Geothermal heat pump system in North America and Europe have used relatively popular, according to the geothermal heat pump consortium statistics, by the end of 2003, the geothermal heat pump technology of refrigeration and heating the building area of the United States is 37200000 square meters, 20000000 square meters of Sweden, Germany is 5600000 square meters, 4350000 square meters of Canada. But the North American and European application has obvious difference.

Air Heat Pumps Development in Western Countries
Application of ground source heat pump in North America, which is focused more on the building to solve the problem of air conditioning refrigeration. In the United States, the government put a lot of efforts to support the promotion of air heat pump, the government and the school after many years of efforts, established throughout the country geological parameters database, and in the States established after approval can heat pump recommended projects, also according to the special requirements of ASHERE system in unit design and establish the standard, at the same time the government support in the ground heat exchanger design and construction aspects of the study, and in different states, and their policies to encourage the geothermal heat pump system of promotion, if special subsidy, the extension of government websites. From the angle of the system design, although North America also have small water heat pump unit, but North America geothermal heat pump system with more is the water loop heat pump system, especially for some large-scale industrial and commercial buildings, the water loop heat pump is becoming the mainstream trend in design. For the earth heat exchanger, the North American use of the single U type vertical buried pipe and horizontal buried pipe way. Drilling depth is between 50-160 meters. In Europe, because the requirements of environmental protection and energy saving, at present, in Europe, can heat pump system in the heating has accumulated rich experience, from the angle of the system design, the water system in Europe, the European water heat pump unit more emphasis on heating, but no special heat pump units to be standard and specialized the geothermal heat pump equipment manufacturer. For the earth heat exchanger, the European technology is more using the double U type vertical pipe burying method.

Heat Pumps Development in China
In China, geothermal heat pump just begins a new refrigeration heating mode. Due to Beijing city on air pollution concerns, cancel the coal boiler heating, in the years 1998 -2003, promoted the rapid prevalence of water source heat pump, water source heat pump in China but the practice shows that the application of water source heat pump, only in certain conditions, in order to achieve better results.

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