کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7052640 | 1457425 | 2013 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Upward branching of two-phase refrigerant in a parallel flow minichannel heat exchanger
ترجمه فارسی عنوان
شعاع صعودی دو فاز مبرد در یک مبدل حرارتی مینیچانل جریان موازی
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کلمات کلیدی
توزیع جریان، مبدل حرارتی، سرتیتر، پیکربندی ورودی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Brazed aluminum heat exchangers are recently considered as evaporators of automotive or residential air conditioners. In this case, it is very important to distribute the two-phase refrigerant (especially the liquid) evenly into each tube. In this study, R-134a flow distribution was experimentally studied for a round header-ten flat tube test section simulating a brazed aluminum heat exchanger. Three different inlet orientations (parallel, normal, vertical) were investigated. Tests were conducted with upward flow for the mass flux from 70 to 130 kg mâ2 sâ1 and quality from 0.2 to 0.6. Tubes were protruded to center of the header. Results show that better distribution (both for liquid and gas) is obtained for vertical inlet configuration. Possible explanation is provided based on flow visualization results. Efforts were made to develop correlations to predict the liquid or gas distribution in a header with limited success. Refined correlations should consider both geometric and operating variables. Header pressure drop data are also provided.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 51, November 2013, Pages 189-203
Journal: Experimental Thermal and Fluid Science - Volume 51, November 2013, Pages 189-203
نویسندگان
Nae-Hyun Kim, Ho-Won Byun, Yong-Sub Sim,