COMPARATIVE ANALYSIS OF DIRECT AND INDIRECT COOLING OF WIDE-BANDGAP POWER MODULES AND PERFORMANCE ENHANCEMENT OF JET IMPINGEMENT-BASED DIRECT SUBSTRATE COOLING

被引:0
作者
Barua, Himel [1 ]
Gurpinar, Emre [1 ]
Xue, Lingxiao [1 ]
Ozpineci, Burak [1 ]
机构
[1] Oak Ridge Natl Lab, Bldg & Transportat Sci Div, Oak Ridge, TN 37830 USA
来源
PROCEEDINGS OF ASME 2022 INTERNATIONAL TECHNICAL CONFERENCE AND EXHIBITION ON PACKAGING AND INTEGRATION OF ELECTRONIC AND PHOTONIC MICROSYSTEMS, INTERPACK2022 | 2022年
关键词
Wide-bandgap device; direct substrate cooling; jet impingement; THERMAL MANAGEMENT; HEAT-TRANSFER; NOZZLE GEOMETRY;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
With the development of high-power and high-torque machines, requirements for high-power density electronics are increasing. Thermal management of such systems requires high heat extraction. Conventional air cooling based heat sinks and cold plate based liquid cooling have their own benefits for various applications but has limitations for high power density applications. The current study explores a jet impingement based direct substrate cooling system that was implemented for a SiC based direct bonded Cu substrate for various power losses. Numerical comparison between jet impingement cooling and conventional horizontal/indirect cooling (pin fin heat sink and genetic algorithm- optimized heat sink) showed that the area weighted average of the heat transfer coefficient (HTC) is high for both horizontal cooling designs, and the local HTC is higher for jet impingement. Design iterations were undertaken to resolve the bottleneck of this cooling system. Increasing the number of nozzles helped to cover more area at the direct bonded Cu bottom plate, which drops the chip temperature considerably. With a constant flow rate, increasing the number of nozzles would decrease local jet velocity, which reduces the heat extraction by jet impingement. This issue can be addressed by reducing the diameter of nozzle but doing so results in a high pressure drop where the design constraint is 2 psi. A flared nozzle design is proposed, which has a higher spreading angle of the jet that increases the flow coverage and reduces the pressure drop of the coolant loop.
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页数:11
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