کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7046163 1457098 2018 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Two-phase spray cooling with HFC-134a and HFO-1234yf on practical enhanced surfaces
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Two-phase spray cooling with HFC-134a and HFO-1234yf on practical enhanced surfaces
چکیده انگلیسی
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-cm2 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 °C) using a range of liquid flow rates (2.5-4.5 ml/cm2 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 131, 25 February 2018, Pages 150-158
نویسندگان
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