Entropy Generation Analysis on Operating Parameters in Surface Water Freezing Latent Heat Exchanger

Surface source heat pump system with freezing latent heat collection plays a significant role in energy-saving and environmental protection in districting heating of the cold areas. In the system, the surface water freezing latent heat exchanger is one of the key devices and its operating parameters are directly related to the heating performance. Based on the entropy generation theorem, the entropy production rate on the convective heat transfer and ice heat conduction and the average entropy production rate of deicing cycle are deduced in the freezing latent heat exchanger. With a calculation example, it illuminates that the flow friction entropy production rate of convective heat transfer process is dominating, so big surface flux and small wall temperature of pipes are not suitable in the design.