In this study a cooling-fan simulation model was established using the steady-state distributed parameter method

and the performance of a cooling-fan prototype was tested in an air-blower performance test rig. Further

a cooler heat transfer performance analysis was conducted based on the experimental data and numerical simulation. For a temperature calibration of ?25-0 ℃ and a circulation rate varying in the range of 2-5

it was found that the total heat transfer coefficient increases with increasing calibration-box temperature. When the refrigerant is CO2

the cooling capacity of the cooling fan is obviously higher than that for an NH3 refrigerant. Further

the cooling capacity is 42% higher when the temperature in the tank is 0 ℃ and 26% higher for a tank temperature of ?20 ℃. The pressure drop of inner side of the tube increases with increases in the circulation rate. Further

the heat transfer coefficient first increases and then decreases with increases in the circulation rate. The circulation ratio is approximately 3

corresponding to the maximum change in the thermal coefficient. The simulation results exhibit the same trend as the test results

but some errors exist. The error of heat transfer coefficient between the numerical and test results is approximately 16% for the NH3 system

and approximately 8% for the CO2 system.