Abstract
Most refrigerant quantities exist in condenser and evaporator for a household air-conditioner. Slip ratio and void fraction are typical parameters in two-phase region of air-conditioning heat exchanger. When R22 is the working medium, the void fraction of an air-conditioner heat exchanger is calculated with four models in this paper. Based on these calculating results, the characteristics of the four models are analyzed. The influence of refrigerant mass flux on Premoli model and Harms model is also presented. The analysis indicates that it’s reasonable to calculate slip ratio and void fraction of two-phase refrigerant in household air-conditioner heat exchanger with Harms model at temperate refrigerant mass flux. The conclusions of this study could help realize the characteristics of flowing refrigerant in household air-conditioning system.