| Optimization of the self-condensing CO2 transcritical power cycle using solar thermal energy | |
Pan LS(潘利生) ; Li,Bing; Shi,Weixiu; Wei XL(魏小林)
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| Source Publication | APPLIED ENERGY |
| 2019 | |
| Pages | 113608 |
| Conference Name | 10th International Conference on Applied Energy (ICAE) |
| Conference Date | AUG 22-25, 2018 |
| Conference Place | Hong Kong, HONG KONG |
| Abstract | Compared with the conventional Rankine cycle, the CO2 transcritical power cycle gives a higher thermal efficiency because of its high average heat absorbing temperature and is suitable for driving a compact system. The self-condensing CO2 transcritical power cycle can solve the problem that CO2 is difficult to condense in a conventional CO2 transcritical power cycle using conventional water cooling. Based on solar thermal energy, a theoretical analysis model was established to study the relationship between the cycle performance and the operating parameters. The results showed that the thermal efficiency increases with increasing the cooled pressure with a low final cooled temperature. By increasing the final cooled temperature, a peak appears on the thermal efficiency curve. The outlet temperature of the cooling water is affected by a shift of the pinch point position in the cooler. According to the variation of the outlet temperature of the cooling water and the proportion of the mass flow rate of CO2 in the power sub-cycle and that in the whole cycle, it can be concluded that conditions with a very low cooled pressure are uncontrollable. In these conditions, the maximum thermal efficiency of the self-condensing CO2 transcritical cycle is 0.3463, which is 0.0313 a little lower than that of the supercritical CO2 Brayton cycle. However, the novel cycle simplifies the development of the pressurizing component and avoids the liquid hammer in the pressurizing process. |
| Keyword | CO2 transcritical power cycle Supercritical CO2 Brayton cycle Solar thermal energy CO2 condensation |
| WOS ID | WOS:000497971400107 |
| Funding Organization | National Natural Science Foundation of China [51776215]; [3192042]; [3172008] |
| URL | 查看原文 |
| Indexed By | CPCI-S |
| Language | 英语 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/90523 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 2.Beijing Univ Civil Engn & Architecture, Sch Environm & Energy Engn, Beijing 100044, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Pan LS,Li,Bing,Shi,Weixiu,et al. Optimization of the self-condensing CO2 transcritical power cycle using solar thermal energy[C]APPLIED ENERGY,2019:113608. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| CpA2022F028.pdf（1140KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Download | ||
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