کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8072165 | 1521405 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Control strategy and experimental analysis of a direct-expansion solar-assisted heat pump water heater with R134a
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Control strategy and experimental analysis of a direct-expansion solar-assisted heat pump water heater with R134a Control strategy and experimental analysis of a direct-expansion solar-assisted heat pump water heater with R134a](/preview/png/8072165.png)
چکیده انگلیسی
A direct-expansion solar-assisted heat pump (DX-SAHP) system was designed and built in Qingdao China, which was used to supply domestic hot water. The system mainly consisted of a bare solar collector/evaporator with area of 1.56â¯m2, a rotary-type hermetic compressor with rated power of 400â¯W, an electronic expansion valve (EEV) and a micro-channel aluminum flat tube condenser with single surface area of 0.435â¯m2 surrounding a 0.195â¯m3 water tank. The system was charged with 800â¯g of R134a. Based on the degree of superheat at the outlet of the solar collector/evaporator, a control strategy for the system was developed and tested over a wide range of operating conditions, which proved that it could regulate the degree of superheat in range of 5-10â¯Â°C effectively. Then the thermal performance of the system was experimentally studied under various operating conditions. Experimental results showed that for most of the time in 2016, when the 0.195â¯m3 water was heated to the temperature between 55â¯Â°C and 60â¯Â°C, the coefficient of performance (COP) of the prototype device was higher than 3.0. As the solar radiation intensity or ambient temperature increased, the COP of the system increased, and the heating time decreased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 145, 15 February 2018, Pages 17-24
Journal: Energy - Volume 145, 15 February 2018, Pages 17-24
نویسندگان
Xiangqiang Kong, Kailin Jiang, Shandong Dong, Ying Li, Jianbo Li,