Progresses in research of vertical pipe ground source heat pump systems

Presents the study status of the system. The theoretical study focuses on the simulation of ground heat exchangers and the quasi threedimensional model has been popularly accepted. The experimental study is less carried out but still yields some instructive conclusions. The technical and economic study of the couple system also makes some progresses. Application of groundsource heat pump systems is still in primary stage in China, but it will be developed with growing recognition of the government and people.