Optimization of the self-condensing CO2 transcritical power cycle using solar thermal energy

doi:10.1016/j.apenergy.2019.113608

	Optimization of the self-condensing CO2 transcritical power cycle using solar thermal energy
	Pan LS(潘利生)1 ; Li B2 ; Shi WX 2; Wei XL(魏小林)1,3
通讯作者	Pan, Lisheng(panlisheng@imech.ac.cn)
发表期刊	APPLIED ENERGY
	2019-11-01
卷号	253 页码:8
ISSN	0306-2619
摘要	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.
关键词	CO2 transcritical power cycle Supercritical CO2 Brayton cycle Solar thermal energy CO2 condensation
DOI	10.1016/j.apenergy.2019.113608
收录类别	SCI
语种	英语
WOS记录号	WOS:000497971400107
关键词[WOS]	BRAYTON CYCLES ; THERMODYNAMIC ANALYSIS ; PERFORMANCE EVALUATION ; HYDROGEN-PRODUCTION ; GENERATION SYSTEM ; MIXTURES ; HEAT ; INTEGRATION
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Chemical
资助项目	National Natural Science Foundation of China[51776215] ; [3192042] ; [3172008]
项目资助者	National Natural Science Foundation of China
论文分区	一类
力学所作者排名	1
RpAuthor	Pan, Lisheng
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/81211
专题	高温气体动力学国家重点实验室
作者单位	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
推荐引用方式 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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