کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4992623 | 1457392 | 2017 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation on thermal-hydraulic performance of outdoor heat exchanger in air sources heat pump
ترجمه فارسی عنوان
بررسی عملکرد حرارتی و هیدرولیک مبدل حرارتی در فضای باز در پمپ حرارتی
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کلمات کلیدی
عملکرد انتقال حرارت، مبدل حرارتی لوله ارزیابی جامع، تحقیقات میدانی و تجربی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
A plethora of findings exists on the decreasing heat transfer performance of ASHP under frosting condition. This study investigates, using field and laboratory experiments, the frosting behavior and heat transfer performance of fin-tube exchangers. Findings from our initial observation revealed the severity of frosting phenomenon during winter in hot summer and cold winter zone of China; for avoiding the lower COP, defrosting period of ASHP was not longer than 60Â min. The results showed that the basic tube surface temperature decreases with running time and remains stable after 70Â min, and an adverse pressure drop ensued. The findings, thereby suggests a 70Â min defrosting period in ASHP. Comparing jH/fH and COP between exchangers revealed an improved performance of plain fin-tube exchanger over that of louver fin-tube exchanger in all the test conditions. Therefore, under frosting condition, plain fin-tube heat exchanger provides a superior thermal-hydraulic performance over louver fin-tube heat exchanger. Findings from this study will help designers and facility managers in taking a more informed decision when selecting heat exchanger types for ASHP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Thermal and Fluid Science - Volume 84, June 2017, Pages 28-38
Journal: Experimental Thermal and Fluid Science - Volume 84, June 2017, Pages 28-38
نویسندگان
Zhaosong Fang, Lafang Li, Yong Cheng, Houhua Wang, Majeed Olaide Oladokun,