کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
646206 1457161 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The characteristics of boiling heat transfer and pressure drop of R-600a in a circular tube with porous inserts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
The characteristics of boiling heat transfer and pressure drop of R-600a in a circular tube with porous inserts
چکیده انگلیسی
This investigation was undertaken in order to better understand the characteristics of sub-cooled flow boiling heat transfer and pressure drop of a hydrocarbon refrigerant R600a (isobutane) flowing in a circular pipe within dispersed-copper porous inserts. The test was conducted at a saturation temperature of 10 °C, vapor qualities were from 0.076 to 0.87, and there was shown to be a mass flux of 120-1100 kg/m2 s and a heat flux of 12-65 kW/m2. The effects of Reynolds number and the sizes of inserts (the porosity, mean pore diameters and permeability) on the heat transfer and pressure drop of R-600a are presented. In addition, empirical correlations for estimating the boiling heat transfer coefficients and pressure drop for pure R-600a under these conditions have been proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 64, Issues 1–2, March 2014, Pages 348-357
نویسندگان
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