کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10385787 | 882665 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heat Transfer in Flow Boiling Over a Bundle of Horizontal Tubes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Heat Transfer in Flow Boiling Over a Bundle of Horizontal Tubes Heat Transfer in Flow Boiling Over a Bundle of Horizontal Tubes](/preview/png/10385787.png)
چکیده انگلیسی
The paper describes tests boiling R 113 at atmospheric pressure in upward flow over a 17 row column of square pitched electrically heated tubes. Uniform heat fluxes of 10-65 kW m-2 and maximum Reynolds numbers, Remax, between 7800 and 27 000 were used. The data at the lower heat fluxes of 10 and 20 kW m-2 consistently exhibited a linear increase of heat transfer coefficient, h, with quality, the slope lower at 20 kW m-2, so that h at 10 kW m-2 exceeded that at 20 kW m-2 and both reached h at 40 kW m-2 for the maximum quality tested. At the higher heat fluxes a nucleate boiling controlled region was observed at low quality, with h equal to the value at the same heat flux as observed with an isolated tube in a pool, followed by a rise in h at higher quality. The results were compared with the work of other researchers. Heat transfer coefficients for q ⥠40 kW m-2 were predicted to an average r.m.s. deviation of 7%, using the asymptotic flow boiling model. However, the sensitivity of h to change of quality and flow rate predicted was much lower than measured and in some cases exhibited opposite trends.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Research and Design - Volume 83, Issue 5, May 2005, Pages 527-538
Journal: Chemical Engineering Research and Design - Volume 83, Issue 5, May 2005, Pages 527-538
نویسندگان
B.M. Burnside, N.F. Shire,