دورية أكاديمية
Experimental study on the operating performance of the air source heat pump (ASHP) with variable outdoor airflow rate under the standard frosting condition
| العنوان: | Experimental study on the operating performance of the air source heat pump (ASHP) with variable outdoor airflow rate under the standard frosting condition |
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| المؤلفون: | Shimin Liang, Han Wang, Xuefeng Gao, Xiaohui Tian, Hui Zhu, Songtao Hu, Chunwen Lin |
| المصدر: | Energy and Built Environment, Vol 5, Iss 5, Pp 719-726 (2024) |
| بيانات النشر: | KeAi Communications Co., Ltd., 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Environmental technology. Sanitary engineering LCC:Building construction |
| مصطلحات موضوعية: | ASHP, Variable outdoor airflow rate, Frosting, Heating performance, Environmental technology. Sanitary engineering, TD1-1066, Building construction, TH1-9745 |
| الوصف: | Frosting is a common phenomenon of the ASHP under the heating mode in winter, and the outdoor air flow rate flowing through the evaporator of the ASHP was always thought to be a major contributor. In order to validate its contribution, effects of outdoor fan airflow rate on the performance of air source heat pumps (ASHPs) were investigated under the winter heating condition. The experiment was conducted in a laboratory at the standard 2 °C air dry bulb temperature (DB)/ 1 °C air wet bulb temperature (WB) frosting condition, which enabled the analysis of the operating performance, frosting performance, and heating performance of the ASHP unit by changing the airflow rate of the outdoor fan. Results showed that as the airflow rate of the outdoor fan reduced from 100% to 36%, the operating performance decline and the elevated frosting-defrosting loss were observed. Meanwhile, both the frosting rate and the operating efficiency during frosting-defrosting cycles showed an increasing trend then followed by decreasing tendency. The maximum frosting rate and operating efficiency were 0.92 g/m2.min and 2.92, respectively, which were observed at 74% airflow rate of the outdoor fan of the ASHP unit. The observation implied the existence of the “minimum frosting suppression airflow rate”. At 36% airflow rate of the outdoor fan of the ASHP unit, however, the performance of the ASHP unit was attenuated greatly, with the frosting-defrosting efficiency loss coefficient of 0.47, the heating capacity and COP reduction by 51.5 and 38.8%, respectively. These findings provided significant references to the optimization of ASHPs performance with variable airflow rate of the outdoor fan under frosting conditions. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2666-1233 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S266612332300048X; https://doaj.org/toc/2666-1233 |
| DOI: | 10.1016/j.enbenv.2023.06.001 |
| URL الوصول: | https://doaj.org/article/bf2c4670be5e4a90a2e386c7d7bebd1e |
| رقم الأكسشن: | edsdoj.bf2c4670be5e4a90a2e386c7d7bebd1e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 26661233 |
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| DOI: | 10.1016/j.enbenv.2023.06.001 |