Design and application of surface water ground-source heat pump system in cold zone

The minimum temperature of surface water will drop below 2 ℃ in cold zone of northern China in winter, and the design of anti-icing and water intake conditions is the key to the surface water ground-source heat pump systems. This paper analyses the surface water temperature characteristics in cold zone, discusses the calculation method of lake water heat extraction, and studies the connection form, operation conditions and equipment configuration of the heat pump system. Taking a large river water-source heat pump system in Qingdao High-tech Zone as an example, presents the water intake conditions and process design on the water source side. The system operation results show that the optimized water-source heat pump system has high stability and reliability, and can be promoted and applied in cold zone of northern China.