کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6758838 | 1431388 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Numerical analysis of heat exchanger designs for passive spent fuel pool cooling to ambient air
ترجمه فارسی عنوان
تجزیه و تحلیل عددی طرح های مبدل حرارتی برای هوادهی مخزن سوخت هوادهی منفرد به محیط هوای
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کلمات کلیدی
خنک کننده منفعل، استخر سوخت مصرفی، پودر طبیعی مبدل حرارتی، خنک کننده هوا، بهینه سازی طراحی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Passive cooling of spent fuel pools via natural two-phase convection of a fluid with low boiling point is a promising alternative to active cooling circuits as such a passive heat transfer system would still work in safety-critical situations, such as a station blackout. For ambient air as the ultimate heat sink the heat exchanger design plays a crucial role as driving temperature differences may be low. This paper outlines a numerical investigation on a finned oval tube bundle heat exchanger operated under natural air convection in a chimney. We studied the role of chimney geometry and heat exchanger fin geometry. With respect to the chimney we found that velocity, Nusselt number and heat transfer are enhanced by 161.3%, 31.7% and 62.5% respectively, if chimney height increases from 2â¯m to 16â¯m. With respect to the fin design we determined an optimal fin configuration with a fin height of 17â¯mm, fin spacing of 3â¯mm and fin thickness of 1.5â¯mm, which improves the heat transfer performance by 28.7%, the Nusselt number by 28.9% and the fin efficiency by 19.2% at a given temperature difference of 40â¯K. The final optimized finned tube bundle heat exchanger design achieves a volumetric heat transfer density of qâ¾vol=3.61kWmK.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 333, July 2018, Pages 224-234
Journal: Nuclear Engineering and Design - Volume 333, July 2018, Pages 224-234
نویسندگان
Sebastian Unger, Eckhard Krepper, Uwe Hampel,