The effect of the temperature of the calibration tank

face velocity

and circulation rate on the performance of a CO2 air-cooler are analyzed using theoretical calculation and experimental study. The theoretical calculation is carried out by establishing a mathematical model

the results of which show that when the temperature of the calibration tank increases from ?30℃ to ?10℃

the coefficient of the heat transfer increases by 5.8%

and the corresponding refrigerating capacity increases by 5.9%. Under the calculation conditions

the best face velocity (3.2 m/s) occurs

providing the best air-cooler performance; in addition

the coefficient of heat transfer of the air-cooler increases rapidly with an increase in the circulation rate

and the growth tends to be smooth

with the best circulation rate at about three. Comparing the experimental value with the theoretical calculation of the CO2 air-cooler

the results show that the theoretical calculation is higher

the error of which is between 14.8% and 25%; however

the trends between the theoretical calculation and the experimental value are basically the same

verifying the rationality of the mathematical model.