Self-optimized efficient operation of trans-critical CO2 ejector-expansion heat pump water heater system with two-stage evaporation
文献类型：期刊论文
| 作者 | Liu, Guangping1,2,3,4; Li, Huashan1,2,4; Lu, Zhenneng1,2,4; Wang, Yongzhen5; Gong, Yulie1,2,3,4 |
| 刊名 | ENERGY AND BUILDINGS
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 300页码:16 |
| 关键词 | CO 2 heat pump Ejector -expansion Efficient operation Extremum seeking control |
| ISSN号 | 0378-7788 |
| DOI | 10.1016/j.enbuild.2023.113659 |
| 通讯作者 | Lu, Zhenneng(luzhenneng728@163.com) ; Wang, Yongzhen(wyz80hou@bit.edu.cn) |
| 英文摘要 | In application scenarios with lower ambient temperatures and higher sink temperatures, the trans-critical CO2 heat pump water heater system using an ejector instead of a conventional expansion device offers better performance, and the higher pressure differential allows for partial pressure loss recovery through the ejector. However, the complexity of discharge pressure and ejector matching affects the further application of the system. Therefore an optimization method called Extremum seeking control method is proposed to achieve the lowest power consumption implementation under off-design conditions. The ESC controller applied to the system uses the compressor power consumption as the feedback signal and the discharge pressure is used as operating input set-point. The dynamical model of a trans-critical CO2 heat pump water heater built on Modelica/Dymola is used as the study object and optimized for three scenarios: fixed, sloped step profile, and actual ambient temperature. The simulation results show that the ESC applicable to the proposed system can optimize the matching of discharge pressure and ejector driving nozzle throat area to obtain the best performance. Compared with the optimization results of the quasi-Newton method applied to the benchmark system, the extremum seeking control for actual ambient temperature conditions results in a 5.7% increase in system efficiency. |
| WOS关键词 | EXTREMUM SEEKING CONTROL ; REFRIGERATION SYSTEM ; PERFORMANCE ; CYCLE |
| 资助项目 | Shandong Energy Institute[SEI U202315] ; Science and Technology Projects of State Grid Corporation of China[5400-202140401A-0-0-00] |
| WOS研究方向 | Construction & Building Technology ; Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001096426300001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | Shandong Energy Institute ; Science and Technology Projects of State Grid Corporation of China |
| 源URL | [http://ir.giec.ac.cn/handle/344007/40163]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Lu, Zhenneng; Wang, Yongzhen |
| 作者单位 | 1.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.Univ Sci & Technol China, Sch Energy Sci & Engn, Guangzhou 510640, Peoples R China 4.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 5.Beijing Inst Technol, Sch Mech Engn, Beijing 10081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Guangping,Li, Huashan,Lu, Zhenneng,et al. Self-optimized efficient operation of trans-critical CO2 ejector-expansion heat pump water heater system with two-stage evaporation[J]. ENERGY AND BUILDINGS,2023,300:16. |
| APA | Liu, Guangping,Li, Huashan,Lu, Zhenneng,Wang, Yongzhen,&Gong, Yulie.(2023).Self-optimized efficient operation of trans-critical CO2 ejector-expansion heat pump water heater system with two-stage evaporation.ENERGY AND BUILDINGS,300,16. |
| MLA | Liu, Guangping,et al."Self-optimized efficient operation of trans-critical CO2 ejector-expansion heat pump water heater system with two-stage evaporation".ENERGY AND BUILDINGS 300(2023):16. |
入库方式： OAI收割
来源：广州能源研究所
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