Two-phase spray cooling with HFC-134a and HFO-1234yf on practical enhanced surfaces

被引：45
作者：
Bostanci, H. [1 ]
Altalidi, S. S. [1 ]
Nasrazadani, S. [1 ]
机构：
[1] Univ North Texas, Dept Engn Technol, UNT Discovery Pk,3940 North Elm St F115, Denton, TX 76207 USA
来源：
APPLIED THERMAL ENGINEERING | 2018年 / 131卷
关键词：
Thermal management; Power electronics; Electric-drive vehicle; IGBT; Microporous surface; Scanning electron microscopy; CRITICAL HEAT-FLUX; THERMAL MANAGEMENT; SINGLE-PHASE;
D O I：
10.1016/j.applthermaleng.2017.11.142
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An experimental study was conducted to characterize the spray cooling performance of HFC-134a and HFO-1234yf refrigerants using enhanced surfaces produced by simple processes with implications for active two-phase cooling of automotive power electronics. Experimental setup involved a closed loop spray cooling system featuring a pressure atomized spray nozzle and a 1-cm(2) heater sample that simulated a high heat flux device. Heat transfer surfaces consisted of three modified surfaces, namely, electroplated-microporous, sanded, and blasted surfaces, along with a smooth surface that served as a reference. Tests were performed with saturated working fluids at room temperature (22 degrees C) using a range of liquid flow rates (2.5-4.5 ml/cm(2) s). Based on the results, HFC-134a provided a better performance through higher heat transfer coefficient (HTC) and critical heat flux (CHF) values compared to HFO-1234yf that can mainly be attributed to the thermophysical properties and their effect on two-phase heat transfer process. The electroplated-microporous surface achieved the highest heat transfer enhancement among the tested surfaces. Overall, this study provided a framework for two-phase spray cooling performance of the current and next-generation refrigerants aimed for advanced thermal management of automotive power inverter modules towards achieving cost, size and weight reduction. (C) 2017 Elsevier Ltd. All rights reserved.
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页码：150 / 158
页数：9
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