کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7059193 1458088 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flow boiling heat transfer in the evaporator of a loop thermosyphon operating with CuO based aqueous nanofluid
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Flow boiling heat transfer in the evaporator of a loop thermosyphon operating with CuO based aqueous nanofluid
چکیده انگلیسی
An experimental study was carried out to understand the flow boiling heat transfer of water based CuO nanofluids in the evaporator of a thermosyphon loop under steady sub-atmospheric pressures. Experimental results show that both the heat transfer coefficient (HTC) and the critical heat flux (CHF) of flow boiling in the evaporator of the thermosyphon loop could be enhanced by substituting nanofluids for water. The operating pressure has apparent impact on the HTC enhancement of nanofluids. However, the operating pressure has negligible effect on the CHF enhancement. There exists an optimal mass concentration of nanoparticles corresponding to the best enhancement effect. Experimental results show that the CHF enhancement results mainly from the existing of the coating layer on the heated surface formed by the sediment of nanoparticles. However, the HTC enhancement results from the effects of both the existing of the coating layer and the change of thermophysical properties of the working fluid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 25–26, December 2012, Pages 7375-7384
نویسندگان
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