Temporary CO2 capture shut down: Implications on low pressure steam turbine design and efficiency

Marcus Thern, Kristin Jordal, Magnus Genrup

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

5 Citations (SciVal)

Abstract

The Natural gas Combined Cycle (NGCC) with post combustion capture using liquid solvents may in some cases be of interest to design with a flexible steam bottoming cycle, so that it can operate both with and without CO2 capture. It is then important that the choice of the low pressure (LP) steam turbine exhaust size is made accordingly. The paper describes why a flexible NGCC requires a LP steam turbine with smaller exhaust than the corresponding NGCC without CO2 capture, and how this will affect the LP turbine exhaust loss and NGCC process efficiency. Handling large variations in LP steam flow is in fact wellknown technology in combined heat and power (CHP) plants, and the use of 3D simulation tools can further help making the best LP steam turbine design choice. (C) 2013 Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).
Original languageEnglish
Title of host publication7th Trondheim Conference on Co2 Capture, Transport and Storage (2013)
PublisherElsevier
Pages14-23
Volume51
DOIs
Publication statusPublished - 2014
Event7th Trondheim Conference on CO2 Capture, Transport and Storage (TCCS) - Trondheim, NORWAY
Duration: 2013 Jun 52013 Jun 6

Publication series

Name
Volume51
ISSN (Print)1876-6102

Conference

Conference7th Trondheim Conference on CO2 Capture, Transport and Storage (TCCS)
Period2013/06/052013/06/06

Subject classification (UKÄ)

  • Energy Engineering

Keywords

  • post-combustion capture
  • LP steam turbine
  • exhaust loss
  • capture
  • flexibility
  • turn-up mode

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