The scientific and technical problems and solutions on shallow ground-source heat pump system

This paper discusses the concept and principle of shallow ground-source heat pump system（SGHPS）and studies the purpose and significance of its development.We analyze the key scientific and technical problems on SGHPS,including pump injection problem,the temperature field of ground heat exchanger system under variable working condition,the influence of main parameters on the heat transfer effect.We also put forward some valuable solutions and rational suggestions to improve the level of science and technology according to the characteristics of SGHPS,which would promote the development of the shallow ground to heat pump industry.