When compressor starts and doesn’t reach stable

the two phase refrigerant mass calculation should consider the affection of non-linear quality distribution. A novel refrigerant mass calculation method for phase-lumped air cooled heat exchanger model is proposed. Firstly

the refrigerant quality distribution is predicted based on distributed heat exchanger model

then the dimensionless length of arbitrary point for two phase zone is introduced to describe the point of two phase zone; and then the refrigerant quality with the dimensionless length is fitted in polynomial; lastly

the mean void fraction for predicting two-phase refrigerant mass is described. When the refrigerant quality distribution is nearly linear

the difference of predicted refrigerant mass between the novel model and the existed model is small. When the refrigerant quality distribution is intensively non-linear

comparing with the existed two-phase refrigerant mass calculation model based on linear quality distribution

the novel two-phase refrigerant mass calculation model can decrease mean deviation and max deviation respectively to the 59% and 55% of the original ones

while the calculation speeds of these two models are similar.