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Optimization of the self-condensing CO2 transcritical power cycle using solar thermal energy
Pan LS(潘利生)1; Li B2; Shi WX2; Wei XL(魏小林)1,3
Corresponding AuthorPan, Lisheng(panlisheng@imech.ac.cn)
Source PublicationAPPLIED ENERGY
2019-11-01
Volume253Pages:8
ISSN0306-2619
AbstractCompared 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.
KeywordCO2 transcritical power cycle Supercritical CO2 Brayton cycle Solar thermal energy CO2 condensation
DOI10.1016/j.apenergy.2019.113608
Indexed BySCI
Language英语
WOS IDWOS:000497971400107
WOS KeywordBRAYTON CYCLES ; THERMODYNAMIC ANALYSIS ; PERFORMANCE EVALUATION ; HYDROGEN-PRODUCTION ; GENERATION SYSTEM ; MIXTURES ; HEAT ; INTEGRATION
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding ProjectNational Natural Science Foundation of China[51776215] ; [3192042] ; [3172008]
Funding OrganizationNational Natural Science Foundation of China
Classification一类
Ranking1
ContributorPan, Lisheng
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81211
Collection高温气体动力学国家重点实验室
Affiliation1.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 B,Shi WX,et al. Optimization of the self-condensing CO2 transcritical power cycle using solar thermal energy[J]. APPLIED ENERGY,2019,253:8.
APA 潘利生,Li B,Shi WX,&魏小林.(2019).Optimization of the self-condensing CO2 transcritical power cycle using solar thermal energy.APPLIED ENERGY,253,8.
MLA 潘利生,et al."Optimization of the self-condensing CO2 transcritical power cycle using solar thermal energy".APPLIED ENERGY 253(2019):8.
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