Thermodynamic study of main compression intercooling effects on supercritical CO2 recompression Brayton cycle

Yuegeng Ma, Ming Liu, Junjie Yan and Jiping Liu

Energy, 2017, vol. 140, issue P1, 746-756

Abstract: Supercritical CO2 recompression Brayton cycle has emerged as a promising power cycle for various types of power conversion systems. In order to seek further performance improvement of supercritical CO2 recompression Brayton cycle, thermodynamic effects of main compression intercooling (MCIC) are investigated in this work. Mathematical models were developed for Supercritical CO2 recompression Brayton cycle with MCIC. Two key variable parameters, i.e., compressor pressure ratio and pressure ratio distribution between two main compression stages (represented with RPRMC,1), were optimized. Effects of working conditions on MCIC effects and the optimized parameters were investigated. A comprehensive comparison between cycles with and without MCIC was performed in four typical conditions from both design and off-design viewpoints. Results show that RPRMC,1 is more predominant to cycle efficiency than compressor pressure ratio. 2.65% efficiency improvement can be obtained by the integration of MCIC in the reference conditions. The variations of working conditions impact MCIC effects on cycle efficiencies. The optimized results of compressor pressure ratio and RPRMC,1 are affected by the variation of minimum temperature, maximum temperature and maximum pressure. In addition to cycle efficiency improvement, the integration of MCIC also shows potentials in costs saving and cycle robustness improvement.

Keywords: Supercritical carbon dioxide; Recompression Brayton cycle; Intercooling; Parameters optimization; Efficiency improvement (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (17)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544217314032
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:140:y:2017:i:p1:p:746-756

DOI: 10.1016/j.energy.2017.08.027

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().