IMECH-IR  > 高温气体动力学国家重点实验室
Investigation on the cycle performance and the combustion characteristic of two CO2-based binary mixtures for the transcritical power cycle
Pan LS(潘利生); Ma YJ; Li T(李腾); Li HX(李慧鑫); Li B; Wei XL(魏小林)
Corresponding AuthorPan, Lisheng(panlisheng@imech.ac.cn) ; Li, Teng(liteng@imech.ac.cn)
Source PublicationENERGY
2019-07-15
Volume179Pages:454-463
ISSN0360-5442
AbstractIt is difficult to condense subcritical CO2 in the CO2 transcritical power cycle by the conventional cooling, because of CO2's low critical temperature. With the aim to solve this problem, a new transcritical power cycle is proposed, using a CO2-based binary mixture as working fluid. Two mixtures are considered, namely, n-butane/CO2 and isobutane/CO2. Because n-butane and isobutane are flammable, the flammability of the mixtures are worth of note as well as their cycle performance. A laminar flame combustion rate experimental platform is established to investigate the combustion characteristics of both mixtures under different mixing ratio. The results show that their critical temperature increases with increasing the organic fraction and their critical pressure shows a peak value in considered conditions. The critical temperature can reach 40 degrees C with the organic fraction of 0.0711 for n-butane/CO2 and 0.0806 for isobutane/CO2. Under these mixing ratios, the transcritical power cycle can run by the conventional water cooling. The thermal efficiency reaches the highest value of 12.78% under the mole ratio of 0.28/0.72 for n-butane/CO2. Isobutane/CO2 gives the best condition under the mole ratio of 0.32/0.68, with the thermal efficiency reaching 12.97%. The flammable critical mole ratios for n-butane/CO2 and isobutane/CO2 are 0.04/0.96 and 0.09/0.91, respectively. (C) 2019 Elsevier Ltd. All rights reserved.
KeywordCO2-Based mixtures Transcritical power cycle Waste heat recovery Flammability
DOI10.1016/j.energy.2019.05.010
Indexed BySCI ; EI
Language英语
WOS IDWOS:000472813800038
WOS KeywordBRAYTON CYCLE ; HEAT-TRANSFER ; HYDROCARBONS ; CO2
WOS Research AreaThermodynamics ; Energy & Fuels
WOS SubjectThermodynamics ; Energy & Fuels
Funding ProjectNational Natural Science Foundation of China[51776215] ; Beijing Natural Science Foundation[3192042] ; State Key Laboratory of High-temperature Gas Dynamics ; [LHD2017MS07]
Funding OrganizationNational Natural Science Foundation of China ; Beijing Natural Science Foundation ; State Key Laboratory of High-temperature Gas Dynamics
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79423
Collection高温气体动力学国家重点实验室
Recommended Citation
GB/T 7714
Pan LS,Ma YJ,Li T,et al. Investigation on the cycle performance and the combustion characteristic of two CO2-based binary mixtures for the transcritical power cycle[J]. ENERGY,2019,179:454-463.
APA 潘利生,Ma YJ,李腾,李慧鑫,Li B,&魏小林.(2019).Investigation on the cycle performance and the combustion characteristic of two CO2-based binary mixtures for the transcritical power cycle.ENERGY,179,454-463.
MLA 潘利生,et al."Investigation on the cycle performance and the combustion characteristic of two CO2-based binary mixtures for the transcritical power cycle".ENERGY 179(2019):454-463.
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