On Development of Urban Terrestrial Heat Pumps and Waste Heat Pumps

Heat pump is the equipment that provides heating or cooling for buildings when heat moves from high temperature material to low temperature material.It enjoys high efficiency and have the advantages of energy saving and environmental protection.Newly developed terrestrial heat pumps,which use soil layer and underground water as low temperature material,and waste heat pumps,which use circulating cold water or waste heat as conducting material,have prospects for the future.China is abundant in low heat resources,and industry and mining enterprises give off a large amount of waste heat.The comprehensive utilization of terrestrial heat pumps and waste heat pumps is of great importance for improving the urban environment and saving energy.