کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7052630 1457425 2013 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Visualization study on nucleate pool boiling of ethane, isobutane and their binary mixtures
ترجمه فارسی عنوان
مطالعه تجسم بر روی گرمایش استاتیک هسته ای اتان، ایزوبوتان و مخلوط های دوتایی آنها
کلمات کلیدی
جوش پایدار هسته ای، اتان / ایزوبوتان، مخلوط، تجسم، رفتار حباب،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Visualization experiments were carried out to investigate the nucleate pool boiling heat transfer characteristics of ethane, isobutane and their binary mixtures on a horizontal flat surface. Extensive experimental heat transfer coefficient data were obtained under various pressures of 0.1 MPa, 0.3 MPa and 0.5 MPa for pure substances and 0.3 MPa for mixtures. The measurements were performed under heat fluxes from 20 kW/m2 to 150 kW/m2 at a descending heat flux procedure. For binary mixtures, the pool boiling data were measured covering the whole concentration range. Obvious heat transfer coefficient reduction for mixtures was found. Various empirical correlations were screened out for comparison. The accuracy for those correlations varied considerably with mixture concentrations and measurement conditions. The bubble departure diameter and frequency for pure substances and mixtures were also carefully observed. Increasing heat flux can obviously increase the bubble departure diameter and frequency for both pure refrigerants and mixtures. But the mixture effect shows non-linear influence on the bubble size and departure frequency, which varies distinctly with mixture concentrations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 51, November 2013, Pages 164-173
نویسندگان
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