کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4994805 | 1458036 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of subcooling on downward facing boiling heat transfer with micro-porous coating formed by Cold Spray technique
ترجمه فارسی عنوان
اثرات خنک کننده بر روی انتقال حرارت جوش تحتانی با پوشش میکرو متخلخل بوسیله تکنیک اسپری سرد
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
External reactor vessel cooling (ERVC) is an effective strategy to achieve in-vessel retention (IVR) of core melt in the reactor pressure vessel (RPV) under severe accident conditions. Among the available strategies, micro-porous coating technique has been known to enhance the thermal margin of the RPV. In this study, a new and versatile micro-porous coating technique applicable to commercial size reactors known as “Cold Spray” has been developed to coat a hemispherical test vessel. Quenching boiling experiments at different degrees of subcooling (10 °C, 5 °C, 3 °C, 1 °C, and 0 °C) were performed using bare and micro-porous coated vessels. Visual observations of the quenching process along with quantitative analyses of the boiling data were performed. It was found that the critical heat flux (CHF) limit varies significantly with the angular location at all subcooled conditions. Higher cooling rates and CHF limits were obtained with higher degrees of subcooling. A micro-porous coating formed by Cold Spray significantly improved the CHF limit compared to the bare vessel. In fact, nearly 90% enhancement was achieved using the Cold Spray coated vessel. CHF correlations for both bare and micro-porous coated vessel have been proposed capturing the effects of subcooling and angular variation along the outer surface of the hemispherical test vessels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 106, March 2017, Pages 767-780
Journal: International Journal of Heat and Mass Transfer - Volume 106, March 2017, Pages 767-780
نویسندگان
Faruk A. Sohag, Faith R. Beck, Lokanath Mohanta, Fan-Bill Cheung, Albert E. Segall, Timothy J. Eden, John K. Potter,