Nozzle to plate optimization of the jet impingement inlet of a tailored-width microchannel heat exchanger

被引：13

作者：

Barrau, J. ^{[1
]}

Riera, S. ^{[1
]}

Leveille, E. ^{[2
]}

Frechette, L. G. ^{[2
]}

Rosell, J. I. ^{[1
]}

机构：

[1] Univ Lleida, Solar Energy Grp, Lleida 25001, Spain

[2] Univ Sherbrooke, Dept Genie Mecan, Sherbrooke, PQ J1K 2R1, Canada

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2015年 / 67卷

关键词：

Heat sink; Cooling device; Jet impingement; Nozzle geometry; Microchannel; Temperature uniformity; SINGLE-PHASE; SLOT JET; CHANNEL; PERFORMANCE;

D O I：

10.1016/j.expthermflusci.2014.11.012

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This work presents an experimental study on the effect of the nozzle geometry on the performance of a hybrid jet-impingement/microchannels cooling system. The proposed heat sink is designed so as to maintain the temperature of the cooled surface uniform, even with the coolant flow temperature increasing along the flow path. Previous results showed quite uniform temperature distributions with the exception of the zone located just below the jet impingement, where the temperature is higher. In the present work, several nozzle to plate spacings (z/b) are experimentally studied. The impact of nozzle to plate spacing on the stagnation point Nusselt number and the overall temperature distribution varies as a function of the coolant flow rate. A strong coupling between the slot jet geometry, the heat exchange in the varying width microchannel sections and the flow regime is demonstrated. The global thermal resistance, the temperature uniformity and the pressure drops show distinct behavior as a function of the nozzle to plate spacing, implying that the design procedure may weight up these parameters according to the cooling needs. (c) 2014 Elsevier Inc. All rights reserved.

引用

页码：81 / 87

页数：7

共 15 条

[1] Effect of a hybrid jet impingement/micro-channel cooling device on the performance of densely packed PV cells under high concentration [J].