Development and Utilization of Shallow Geothermal Energy at Home and Abroad.docVIP

Development and Utilization of Shallow Geothermal Energy at Home and Abroad 　　【Abstract】As a new efficient and environmentally friendly alternative energy， shallow geothermal energy played an vital role and has entered a golden period of development. 　　【Key words】Shallow geothermal energy； Development； Utilization 　　1 The characteristics of shallow geothermal energy 　　The earths surface is a huge natural reservoir， the solar energy is equivalent to 2000 times the worlds energy consumption. In the range of 10m to the ground surface， the surface temperature is influenced by the atmospheric environment The surface temperature is constant， which is not influenced by the atmospheric environment. Shallow geothermal energy is the thermal energy[1]， which contains the value of the development and utilization of the soil， groundwater and surface water in a certain depth （generally 200m）. Shallow geothermal energy is a kind of heat energy. It is a part of geothermal resources. Shallow geothermal energy development technology is increasingly mature. It has been widely used in heating and cooling. What’s more it is a very good alternative energy and clean energy. Shallow geothermal energy is also known as the shallow geothermal energy[2]. Its energy mainly comes from the solar radiation and the earth gradient. The shallow geothermal energy can be referred to as renewable energy， clean energy， non fuel energy， new energy， process energy， low grade energy and non commodity energy according to according to different classification methods[3]. 　　2 The study of ground source heat pump 　　In the world geothermal can be directly used. In recent years， the development and application of ground source heat pump is prominent in shallow layer geothermal energy. The installed capacity and utilization of energy have rapidly grown at the speed of more than 20%. The technology was adapted to the needs of high efficient energy saving and environment protection and economy， generally a