کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5012733 1462817 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Proposal and thermodynamic analysis of an ejection-compression refrigeration cycle driven by low-grade heat
ترجمه فارسی عنوان
پیشنهاد و تجزیه و تحلیل ترمودینامیکی یک چرخه یخچال فشرده سازی رانده شده با درجه حرارت پایین
کلمات کلیدی
تخریب، فشرده سازی، ذخیره انرژی، تبرید، گرمای کم درجه حرارت خورشیدی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
Ejection-compression refrigeration cycle reduces electricity consumption, by using huge quantity of low-grade heat, which increases equipment cost and occupies more space, especially when it is powered by solar heat. Hence, the large solar collector limits the practicability of ejection-compression refrigeration cycle. To solve this problem, a novel ejection-compression refrigeration cycle is proposed in this paper, which needs less heat and a smaller collector. It is theoretically compared to conventional vapor compression refrigeration cycle and conventional ejection-compression refrigeration cycle. It is also analyzed over wide temperature ranges. Results show that the proposed cycle has a COP 24% higher than conventional vapor compression cycle. The proposed cycle also has a COP 19% lower, heat transforming ratio 181% higher, and COPg 144% higher than those of conventional ejection-compression cycle. With a collector 5 times smaller than a conventional ejection-compression cycle, the novel cycle is suitable for city buildings with limited space or economy sensitive users, although its COP is a little lower than conventional ejection-compression cycle. The effects of evaporating, condensing, generating, and intermediate temperatures (Te, Tc, Tg, and Tm) on cycle performance are explained. At Tm = 10 °C, the maximum COP of 4.78 is obtained with the optimized generation temperatures of 72 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 145, 1 August 2017, Pages 343-352
نویسندگان
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