کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10122807 | 1642855 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Performance of evacuated flat plate solar thermal collectors
ترجمه فارسی عنوان
عملکرد جمع کننده های حرارتی خورشیدی
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کلمات کلیدی
حرارتی خورشیدی، صفحه تخت، خلاء، تخلیه عدم قطعیت،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Two experimental collectors were built and tested to investigate theoretical aspects of evacuated flat plates and develop appropriate technological solutions. One had a metal tray to the rear, the other used two sheets of glass. An array of pillars supports the glass against atmospheric pressure. The experimental procedure was designed to minimise measurement uncertainty. Testing under a solar simulator, with and without a vacuum, showed a sudden drop in heat loss as the pressure was reduced below 0.5â¯Pa. When evacuated the heat loss coefficient fell from 7.43 to 3.65â¯W/m2â¯K and the efficiency at a nominal test condition of ÎTâ¯=â¯60â¯Â°C, Gâ¯=â¯1000â¯W/m2 increased from 36% to 56%. Heat losses from absorber to glass were within 9% of the predicted level. This demonstrates that the heat loss mechanism is well understood.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermal Science and Engineering Progress - Volume 8, December 2018, Pages 296-306
Journal: Thermal Science and Engineering Progress - Volume 8, December 2018, Pages 296-306
نویسندگان
Roger Moss, Stan Shire, Paul Henshall, Farid Arya, Philip Eames, Trevor Hyde,