Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)
- Volume 15 Issue 5
- /
- Pages.337-345
- /
- 2003
- /
- 1229-6422(pISSN)
- /
- 2465-7611(eISSN)
A Dynamic Characteristic of the Multi-Inverter Heat Pump with Frosting
착상을 수반한 멀티 가변속 열펌프의 동특성
Abstract
In the case of heat exchangers operating under frosting condition, the growth of frost layer causes the heat exchanger to increase the thermal resistance and pressure loss of the air flow. In this paper, a transient characteristic prediction model of the heat transfer for multi inverter heat pump with frosting on its surface was presented taking into account the change of the fin efficiency due to the growth of the frost layer. In this dynamic simulation program, which was peformed for a basic air conditioning system model, such as evaporator, condenser, compressor, linear electronic expansion valve (LEV) and bypass circuit. The theoretical model was driven from the obtained heat transfer coefficient and mass transfer coefficient, independently. And we consider heat transfer performance was only affected by a decrease of the wind flow area. The calculated results were compared with some cases of experiments for frosting conditions.