Journal
7TH TRONDHEIM CONFERENCE ON CO2 CAPTURE, TRANSPORT AND STORAGE (2013)
Volume 51, Issue -, Pages 14-23Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2014.07.002
Keywords
post-combustion capture; LP steam turbine; exhaust loss; capture flexibility; turn-up mode
Categories
Funding
- BIGCCS Centre under the Norwegian research program Centres for Environment- friendly Energy Research ( FME)
- Research Council of Norway [193816/ S60]
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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/).
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