Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Part-load performance analysis of a combined cycle with intermediate recuperated gas turbine
 
research article

Part-load performance analysis of a combined cycle with intermediate recuperated gas turbine

Li, Yongyi
•
Zhang, Guoqiang
•
Wang, Ligang  
Show more
February 1, 2020
Energy Conversion And Management

In order to improve the performance of the combined cycle gas turbine (CCGT) under off-design conditions, an intermediate recuperated combined cycle gas turbine (IRCCGT) system was proposed, which was designed to suppress turbine inlet temperature (TIT) from decreasing as the load drops. In this system, a heat exchanger is installed between the third and fourth turbine stages, wherein a portion of the exhaust from the third turbine stage was used to heat the compressed air. In addition, the system-based operation strategy (maximizing the load range that employs constant TIT operation mode) was also analyzed. The results indicate that the TIT can be maintained at the design value until the gas turbine power load is reduced to 49% of the design value. When the inlet guide vane (IGV) angle reached the minimum value, the IRCCGT system increased gas turbine efficiency and combined cycle electrical efficiency by 4.7 and 3.1 percentage points. At the same gas turbine (GT) load, the maximum gains of GT efficiency and combined cycle efficiency were 2.15 and 1.04 percentage points, respectively. The pressure drops in the recuperator had a great impact on system performance, while the minimum recuperative mass flow rate had little effect. Overall, the proposed IRCCGT system can reduce the slope of the efficiency and load curve and improve the operating performance of the system under off-design conditions.

  • Details
  • Metrics
Type
research article
DOI
10.1016/j.enconman.2019.112346
Web of Science ID

WOS:000515440100006

Author(s)
Li, Yongyi
Zhang, Guoqiang
Wang, Ligang  
Yang, Yongping
Date Issued

2020-02-01

Publisher

PERGAMON-ELSEVIER SCIENCE LTD

Published in
Energy Conversion And Management
Volume

205

Article Number

112346

Subjects

Thermodynamics

•

Energy & Fuels

•

Mechanics

•

Thermodynamics

•

Energy & Fuels

•

Mechanics

•

off-design performance

•

combined cycle

•

gas turbine

•

operating strategy

•

intermediate recuperation

•

recuperated gas turbine

•

alternative operating strategy

•

design performance

•

power

•

optimization

•

simulation

•

plant

•

air

•

flexibility

•

efficiency

•

recovery

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SCI-STI-FM  
Available on Infoscience
June 19, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/179045
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés