کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
646188 | 1457161 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modeling refrigerant maldistribution in microchannel heat exchangers with vertical headers based on experimentally developed distribution results
ترجمه فارسی عنوان
مدل سازی توزیع مبرد منجمد در مبدل های حرارتی میکرو کانال با هدر های عمودی بر اساس نتایج توزیع شده آزمایشگاهی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
R410A and R134a upward flow in the transparent vertical header and distribution into the horizontal parallel microchannel tubes were investigated. Refrigerant entered into the header by the five tubes in the bottom pass and exited through the five tubes in the top pass, representing the flow in the outdoor coil under the heat pump mode of reversible systems. Inputting the experimental quality results into a microchannel heat exchanger model, the capacity degradation compared to the uniform distribution case was calculated. The capacity degradation is related to the coefficient of variation of refrigerant maldistribution, which is affected by header geometry and inlet conditions. The capacity degradation of the whole two-pass microchannel heat exchanger was calculated by inputting the derived empirical distribution function in to the model. It was found that the capacity was reduced by up to 30% for R410A and 5% for R134a, respectively, for the conditions examined.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 64, Issues 1â2, March 2014, Pages 172-181
Journal: Applied Thermal Engineering - Volume 64, Issues 1â2, March 2014, Pages 172-181
نویسندگان
Yang Zou, Hanfei Tuo, Pega S. Hrnjak,