کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9708190 | 1466496 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Flow fields in shell-and-tube condensers: comparison of a pure refrigerant and a binary mixture
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Flow fields in shell-and-tube condensers: comparison of a pure refrigerant and a binary mixture Flow fields in shell-and-tube condensers: comparison of a pure refrigerant and a binary mixture](/preview/png/9708190.png)
چکیده انگلیسی
Detailed 2D CFD calculations for vapour flow field and rate of condensation are carried out for a geometry similar to a real shell-and-tube condenser with 100 tubes, with condensation on the shell-side. The differences in vapour flow behaviour are investigated for pure R22 and for a binary mixture of R32 and R134a, which has a gliding temperature difference of 5.5Â K. It is shown that, the flow field for a zeotropic mixture is significantly different from that for a pure fluid. The nature of the mixture flow causes the vapour and condensate to flow counter-currently in part of the condenser. Adjustments of the inlet design turn out to influence the rate of heat transfer by up to 24% for the conditions tested, with greater influence on heat transfer for lower driving forces.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 28, Issue 5, August 2005, Pages 706-713
Journal: International Journal of Refrigeration - Volume 28, Issue 5, August 2005, Pages 706-713
نویسندگان
Tord Karlsson, Lennart Vamling,