کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8208170 | 1531900 | 2018 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental analysis for heat transfer of nanofluid with wire coil turbulators in a concentric tube heat exchanger
ترجمه فارسی عنوان
تحلیلی تجربی برای انتقال حرارت نانوسیم با توربولاتور سیم پیچ در یک مبدل حرارتی لوله مرکزی
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کلمات کلیدی
نانوفیلد ها، افزایش انتقال حرارت، افت فشار، مبدل حرارت مرکزی، توربولرها،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
چکیده انگلیسی
Nanofluids are a novel class of heat transfer suspensions of metallic or nonmetallic nanopowders with a size of less than 100â¯nm in base fluids and they can increase heat transfer potential of the base fluids in various applications. In the last decade, nanofluids have become an intensive research topic because of their improved thermal properties and possible heat transfer applications. For comparison, an experiment using water as the working fluid in the heat exchanger without wire coils was also performed. Turbulent forced convection heat transfer and pressure drop characteristics of Al2O3-water nanofluids in a concentric tube heat exchanger with and without wire coil turbulators were experimentally investigated in this research. Experiments effected particle volume concentrations of 0.4-0.8 to 1.2-1.6â¯vol% in the Reynolds number range from 4000 to 20,000. Two turbulators with the pitches of 25â¯mm and 39â¯mm were used. The average Nusselt number increased with increasing the Reynolds number and particle concentrations. Moreover, the pressure drop of the Al2O3-water nanofluid showed nearly equal to that of pure water at the same Reynolds number range. As a result, nanofluids with lower particle concentrations did not show an important influence on pressure drop change. Nonetheless, when the wire coils used in the heat exchanger, it increased pressure drop as well as the heat transfer coefficient.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Results in Physics - Volume 9, June 2018, Pages 376-389
Journal: Results in Physics - Volume 9, June 2018, Pages 376-389
نویسندگان
Eda Feyza Akyürek, Kadir GeliÅ, Bayram Åahin, Eyüphan Manay,