Abstract:

The thermal performances of different liquid coolants for the liquid radiator are compared in three aspects-thermophysical parameters in different temperature,the heat transfer coefficient in different flow regimes,and the coolant temperature rise in the same power dissipation.As for the 65# coolant and PAO (poly-alpha-olefin fluids),the comparison study indicates that the 65# coolant is better than PAO in the thermophysical property between -20 ℃ and 70 ℃,but worse in the physical parameter stability.Using the two coolants in a radiator for identical power dissipation electronic system,the steady chip temperatures are compared.Experiment shows that the radiator with 65# coolant has superior cooling performance to that with PAO.The chips' steady temperature could be reduced by 10 ℃.

Key words: coolant;thermophysical parameter;heat transfer coefficient;thermal property