Study on Transient Distributed Model of Frost on Heat Pump Evaporator

Abstract

As a building energy saving equipment, the air-source heat pump is used broadly in china. At present, the lumped parameter model of frost, which is based on experiences and depend heavenly on the running conditions, is widely used in simulation study of air-source heat pumps. In this paper, a dynamic distributed parameter model is presented. The model takes the frost deposition on evaporator as one dimensional, transient formulation, whose mass and heat is transferred in porosity and has a moving boundary. Result shows that the proposed model favorably predicted the key parameters in frost formation and compared well with the experimental data.