Plastic capillary tube heat exchanger design of surface water source heat pump

Capillary tube as the radiation terminal of air conditioning system gets progressively attention and application, but as the heat exchanger in a closed surface water source heat pump system has been studied less. Establishes the simplified heat transfer model of capillary, through a large number of numerical calculations, obtains the significant factors influencing the heat transfer capacity. Presents the applicable engineering nomograph. While the temperature difference between inlet and outlet, and the calculation conditions are not the same, gives the correction factor or modified formula of tube length. On this basis, provides the capillary tube heat exchanger design methods and numerical example.