Performance analysis of trade-off for thermal and hydraulic characteristics for liquid-jet-cooled heat sink

Abstract

Aiming to enhance the overall cooling characteristic for high heat flux density and high input power operating chips, the jet nozzle diameters and spacing distribution of the jet nozzle were parametrically investigated. The findings demonstrate that the heat dissipation characteristics of the heating surface presented a volcanic change trend and the heat sink with 2 mm jet nozzle diameter creates a visible tradeoff for thermal and hydraulic characteristics. The larger or smaller jet nozzle holes can weaken cooling capacity. Furthermore, the results of the comprehensive evaluation index PPTR also demonstrated that the overall cooling characteristics of the 2 mm jet nozzle holes were optimal. The distribution pattern of jet nozzle holes on the diverter orifice plate plays an important role in balancing between thermal performance and power consumption. The results show that the non-uniform jet holes have been greatly improved comparing the uniform distribution of jet nozzle holes, and the temperature uniform performance was maximum increased up to 54 %, the power consumption was a maximum decrease of about 9.6 %. It was concluded that the change of the spacing distance and diameters for the jet nozzle has an important value for improving the heat dissipation function of heat sinks.