کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7051818 1457384 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of surface functionalization on the flow boiling heat transfer characteristics of MWCNT/R141b nanorefrigerants in smooth tube
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Effects of surface functionalization on the flow boiling heat transfer characteristics of MWCNT/R141b nanorefrigerants in smooth tube
چکیده انگلیسی
This paper presents an experimental method to study the flow boiling heat transfer characteristics of two functionalized multi-walled carbon nanotube nanorefrigerants (MWCNT-COOH/R141b and MWCNT-OH/R141b). The experimental conditions are as follows: the nanoparticles volume fraction are individually set at 0.059%, 0.117% and 0.176%; the mass flow rate ranges from 100 to 350 kg·m−2·s−1; the inlet vapor quality ranges from 0.2 to 0.7. Results showed that both functionalized MWCNT/R141b nanorefrigerants can enhance the flow boiling heat transfer coefficient of a refrigerant in a tube, and the enhancement was increased with an increase in volume fraction. The heat transfer characteristics of the MWCNT-COOH/R141b nanorefrigerants were better than MWCNT-OH/R141b nanorefrigerants. At the condition of G = 120 kg·m−2·s−1 and a volume fraction 0.176%, the heat transfer coefficient of the MWCNT-COOH/R141b nanorefrigerant and MWCNT-OH/R141b nanorefrigerant increased up to 23.4% and 15.18%, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 92, April 2018, Pages 162-173
نویسندگان
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