Investigation of the Temperature Fluctuation of Single-Phase Fluid Based Microchannel Heat Sink.

Tao Wang,Chengkuo Lee,Wanli Zhang,Jian He,Jiejun Wang,Chuangui Wu,Yao Shuai,Wenbo Luo

doi:10.3390/s18051498

Abstract

The temperature fluctuation in a single-phase microchannel heat sink (MCHS) is investigated using the integrated temperature sensors with deionized water as the coolant. Results show that the temperature fluctuation in single phase is not negligible. The causes of the temperature fluctuation are revealed based on both simulation and experiment. It is found that the inlet temperature fluctuation and the gas bubbles separated out from coolant are the main causes. The effect of the inlet temperature fluctuation is global, where the temperatures at different locations change simultaneously. Meanwhile, the gas bubble effect is localized where the temperature changes at different locations are not synchronized. In addition, the relation between temperature fluctuation and temperature gradient is established. The temperature fluctuation increases with the temperature gradient accordingly.

Highlights

IntroductionWith the development of microelectronics technology in the direction of miniaturization, integration, and intellectualization, the heat flux of microelectronic devices is increasing sharply [1,2]
With the development of microelectronics technology in the direction of miniaturization, integration, and intellectualization, the heat flux of microelectronic devices is increasing sharply [1,2].Thermal management technology is becoming more important for the further development of microelectronic technology [2]
The latest research shows that the heat flux up to 910 W/cm2 is dissipated by a hierarchical manifold microchannel heat sink array [7]

Summary

Introduction

With the development of microelectronics technology in the direction of miniaturization, integration, and intellectualization, the heat flux of microelectronic devices is increasing sharply [1,2]. Most the studies on the boiling state,where wherebubble bubble generation, generation, growth, most of theofstudies focusfocus on the boiling state, growth, and departure contribute to temperature fluctuation [18,19,20] The coolant in such studies is and departure contribute to temperature fluctuation [18,19,20]. Integrated thin-film temperature sensors developed by used for investigating the temperature fluctuation. Such sensors can provide direct and more accurate us are used for investigating the temperature fluctuation. Results that when even when the coolant is single under phase, the temperature fluctuation in the microchannel is not negligible.

Design Considerations

Results and Discussion

The drawing of is a unit is also shown

Conclusions