Power optimization and comparison between simple recuperated and recompressing supercritical carbon dioxide Closed-Brayton-Cycle with finite cold source on hypersonic vehicles

Kunlin Cheng, Jiang Qin, Hongchuang Sun, Heng Li, Shuai He, Silong Zhang and Wen Bao

Energy, 2019, vol. 181, issue C, 1189-1201

Abstract: Closed-Brayton-cycle (CBC) is a potential onboard power generation technology for hypersonic vehicles, but finite cold source limits its power output. To achieve higher electric power, this study presents the power optimization and comparison between the simple recuperated and recompressing supercritical carbon dioxide (S-CO2) CBC. Results indicate that the temperature distribution of precooler is essential to obtain its pinch point temperature difference. There is optimal fuel temperature difference in precooler for electric power of S-CO2 CBCs. Although the recompressing layout has advantages on thermal efficiency, the simple recuperated layout exhibits better on electric power per unit mass flowrate of fuel (219.6 kW vs. 192.5 kW), because the latter utilizes more cooling capacity of fuel. Besides, the optimal inlet temperature of compressor for electric power with finite cold source is far higher than the design value for general S-CO2 compressors (389 K vs. ∼305 K). In a word, it is more reasonable to develop the simple recuperated S-CO2 closed-Brayton-cycle as onboard power generation system of hypersonic vehicles.

Keywords: Closed-brayton-cycle; Supercritical carbon dioxide; Simple recuperated layout; Recompressing layout; Finite cold source; Hypersonic vehicles (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (20)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054421931134X
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:181:y:2019:i:c:p:1189-1201

DOI: 10.1016/j.energy.2019.06.010

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 ().