Definition of cycle based comprehensive efficiency of a cooled turbine

Wei Ba, Xiao-chen Wang, Xue-song Li, Xiao-dong Ren and Chun-wei Gu

Energy, 2019, vol. 168, issue C, 601-608

Abstract: As known that the cooling technology is commonly used in the turbine to protect the turbine blade. The mixing and heat transfer between the high pressure cooling air from the compressor and the turbine main flow would cause energy loss, and it will influence the gas turbine cycle performance. However, the existing definitions of the cooled turbine efficiency always take no account of the work which is added to the cooling air to product high pressure in the compressor, thus, the cooling influence on the gas turbine cycle performance cannot be indicated by using the existing cooled turbine efficiency. In this paper, a definition of cycle based comprehensive efficiency for a cooled turbine is presented, in which the work added to the cooling air during its compression process is considered. The existing efficiency definitions are first reviewed, then, the definition of the cooled turbine comprehensive efficiency is presented and validated numerically to show its capacity. Finally, the redesign of a high-pressure turbine is provided. The result shows that the new efficiency can evaluate a cooled turbine performance comprehensively, and can be used as a reliable evaluation criterion for the optimal design of a turbine or a gas turbine cycle.

Keywords: Cooled turbine; Efficiency; Thermodynamic cycle; Coolant fraction; Optimal design (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054421832348X
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:168:y:2019:i:c:p:601-608

DOI: 10.1016/j.energy.2018.11.137

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 ().