کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
788798 1466448 2011 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of inlet configuration on the refrigerant distribution in a parallel flow minichannel heat exchanger
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Effect of inlet configuration on the refrigerant distribution in a parallel flow minichannel heat exchanger
چکیده انگلیسی

The refrigerant 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 configurations (parallel, normal, vertical) were investigated. Tests were conducted with downward flow for mass flux from 70 to 130 kg m−2 s−1 and quality from 0.2 to 0.6. Tubes were flush-mounted in the test section, with no protrusion into the header. It is shown that normal and vertical inlet yielded similar flow distribution. As mass flux or quality increased, however, better results were obtained for normal inlet configuration. The flow distribution was worst for the parallel inlet configuration. Possible explanation is provided based on flow visualization results. Correlations were developed to predict the fraction of liquid or gas taken off by downstream channel as a function of header gas Reynolds number at immediate upstream.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 34, Issue 5, August 2011, Pages 1209–1221
نویسندگان
, , ,