Cold water phase change energy heat pump system and its heat transfer performance

Presents the working principles of cold water phase change energy heat pumps and phase change heat exchangers. Analyses the effects of cold water flow, intermediate water flow and ice thickness on the heat transfer coefficient of phase change heat exchangers. Carries out experimental studies under a variety of specific operating conditions, and obtains that the fluctuation range of heat transfer coefficient of phase change heat exchangers is 0.52-0.63 kW/(m2·℃), which can be used to determine the optimal operating conditions of water flow on both sides of the heat exchanger and ice thickness. In order to ensure the normal heat transfer of the phase change heat exchanger, the ice thickness should be kept within 8.5 mm, the heat transfer coefficient is not lower than 0.52 kW/(m2·℃), and cold water flow and intermediate water flow should be controlled at 50 t/h and 30 t/h, respectively.