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First law thermodynamic analysis of the recuperated Humphrey cycle for gas turbines with pressure gain combustion

Stathopoulos, Panagiotis and Rähse, Tim and Vinkeloe, Johann and Djordjevic, Neda (2020) First law thermodynamic analysis of the recuperated Humphrey cycle for gas turbines with pressure gain combustion. Energy, 200. Elsevier. doi: 10.1016/j.energy.2020.117492. ISSN 0360-5442.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0360544220305995

Abstract

The current work is an analysis of the recuperated Humphrey cycle. Three cycle topologies are studied with and without turbine cooling. The study focuses on the interconnection between combustor pressure gain and heat recuperation. It is an attempt to optimize the cycle topology and configuration to achieve the maximum possible cycle efficiency. It is found that the best option to use recuperation in the Humphrey cycle is to operate the combustor at stoichiometric conditions, without preheating the air fed to it. The combustion air comes effectively form a compressor air bleed. The remaining air is further compressed at the combustor outlet pressure and is fed to a plenum between combustor and turbine once it is preheated by the recuperator. This cycle configuration results in the best performance both in terms of efficiency and specific work. Specifically, an efficiency increase between 2 to 5 percentage points is achieved. This work concludes with a feasibility study for shockless explosion combustion (SEC) for the Humphrey cycle configurations and topologies that achieve an efficiency advantage against the Joule cycle. It is found that realistic SEC combustor lengths and efficiency gains can be simultaneously achieved, albeit not at the cycle configurations with the best performance

Item URL in elib:https://elib.dlr.de/139564/
Document Type:Article
Title:First law thermodynamic analysis of the recuperated Humphrey cycle for gas turbines with pressure gain combustion
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Stathopoulos, PanagiotisPanagiotis.Stathopoulos (at) dlr.deUNSPECIFIED
Rähse, TimTU Berlin, Institute of Fluids Dynamics and Technical AcousticsUNSPECIFIED
Vinkeloe, JohannTU Berlin, Institute of Fluids Dynamics and Technical AcousticsUNSPECIFIED
Djordjevic, NedaTU Berlin, Institute of Fluids Dynamics and Technical AcousticsUNSPECIFIED
Date:5 April 2020
Journal or Publication Title:Energy
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:200
DOI :10.1016/j.energy.2020.117492
Publisher:Elsevier
ISSN:0360-5442
Status:Published
Keywords:Pressure gain combustion, Humphrey cycle, Recuperation, Gas
HGF - Research field:Energy
HGF - Program:Energy Efficiency, Materials and Resources
HGF - Program Themes:Other
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Low-Carbon Industrial Processes (old)
Location: Cottbus
Institutes and Institutions:Institute of Low-Carbon Industrial Processes
Deposited By: Klinkmüller, Maike
Deposited On:04 Jan 2021 11:01
Last Modified:04 Jan 2021 11:01

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