18 May 2017

O.1.6.3 A new method for preventing air-source heat pumps and refrigerators from frosting

In this study, we proposed a new method to prevent air-source heat pumps and refrigerators from frosting, in which a desiccant-coated heat exchanger (DCHE) is used to dehumidify the air before it enters the evaporator, consequently retarding frosting on its surface. Theoretical and experimental studies were conducted for the proposed frost-free heat pump and frost-free household refrigerator-freezer. Simulation results show that the proposed systems have high energy efficiency, while experimental results verify that frost-free operation could be realized and the DCHE could be regenerated under the condensation temperature of the proposed systems.