Thermodynamic analyses of a novel ejector enhanced dual-temperature air source heat pump cycle with self-defrosting
文献类型：期刊论文
| 作者 | Li, Shengyu5; Lu, Jun5; Li, Wuyan4; Zhang, Yunqian3,5; Huang, Sheng5; Tian, Liu5; Lv, Yifei5; Hu, Yafei1,2; Zeng, Yijiang5 |
| 刊名 | APPLIED THERMAL ENGINEERING
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 215页码:16 |
| 关键词 | Ejector Dual-temperature air-source heat pump Different operating cases Defrosting method Efficiency improvement |
| ISSN号 | 1359-4311 |
| DOI | 10.1016/j.applthermaleng.2022.118944 |
| 通讯作者 | Lu, Jun(lujun@cqu.edu.cn) |
| 英文摘要 | Previous studies have pointed out problems with the dual-temperature air source heat pump. Thus, this paper proposes a novel dual-temperature air source heat pump cycle with a self-defrosting method for simultaneous production of heat sources at different temperatures. An ejector was added to the novel system, which reduced the heat transfer temperature difference of the low-temperature condenser and the utilization of multiple heat sources. In addition, a new type of defrosting, which utilizes the heat from the hot liquid refrigerant to defrost the evaporator using two evaporators and a four-way valve, is used to reduce the energy needed for defrosting and decrease temperature fluctuations. Thermodynamic modeling using the energetic and exergetic analysis method was employed to evaluate the modified cycle performance and compare it with that of the basic heat pump cycle. Eco-friendly refrigerants, such as R134a, R600a, R290, and R1234yf, were adopted as the working fluid. The simulation results show that the heating coefficient and exergy efficiency in the proposed cycle were improved by 29.34% and 43.52%, respectively, compared with those of the standard cycle under typical operating conditions. Among the refrigerants, the eco-friendly refrigerant R600a exhibited the best performance under various operating conditions. Moreover, the COP in the new system was 20.72-44.47% higher than that of a traditional system, and the exergy efficiency improvement was 29.70-49.19% compared to the standard system. In summary, this study confirms the performance enhancement potential of an ejector-based dual-temperature air-source heat-pump cycle and provides theoretical support for its practical implementation. |
| WOS关键词 | REFRIGERATION SYSTEM ; PERFORMANCE ANALYSIS ; MULTIOBJECTIVE OPTIMIZATION ; FLASH TANK ; R1234YF ; DESIGN |
| WOS研究方向 | Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000848327100005 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.giec.ac.cn/handle/344007/37194]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Lu, Jun |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.Midea Grp Shanghai Co Ltd, Shanghai 201702, Peoples R China 4.Tsinghua Univ, Sch Architecture, Dept Bldg Sci, Beijing 100084, Peoples R China 5.Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shengyu,Lu, Jun,Li, Wuyan,et al. Thermodynamic analyses of a novel ejector enhanced dual-temperature air source heat pump cycle with self-defrosting[J]. APPLIED THERMAL ENGINEERING,2022,215:16. |
| APA | Li, Shengyu.,Lu, Jun.,Li, Wuyan.,Zhang, Yunqian.,Huang, Sheng.,...&Zeng, Yijiang.(2022).Thermodynamic analyses of a novel ejector enhanced dual-temperature air source heat pump cycle with self-defrosting.APPLIED THERMAL ENGINEERING,215,16. |
| MLA | Li, Shengyu,et al."Thermodynamic analyses of a novel ejector enhanced dual-temperature air source heat pump cycle with self-defrosting".APPLIED THERMAL ENGINEERING 215(2022):16. |
入库方式： OAI收割
来源：广州能源研究所
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