Nowadays

miniaturization is a feasible course of action in the development of brazed plate heat exchangers. In this study

a mini-channel brazed plate condenser with an equivalent diameter of 1.5 mm was studied. The heat transfer and pressure drop characteristics were analyzed. First

a one-dimensional steady-state distribution parameter model was established by the finite volume method to compute the condensation performance of R134a and R1234yf. Second

an experiment was conducted to confirm the reliability of the simulation model. According to the experimental results

the simulation model has high precision. The average error of the heat transfer performance predicted by the model is 4%

and the average error of pressure drop predicted by the model is 16%. Finally

the simulation model was used to calculate the condensation heat transfer characteristics of R134a and R1234yf in the mini-channel brazed plate heat exchanger. The simulation results show that the heat transfer performance and pressure drop of R1234yf are 9% and 8% lower than that of R134a under the same condensation conditions.