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Simulation And Optimization Of Evaporative Gas Turbine With Chemical Absorption For Carbon Dioxide Capture
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
2009 (English)In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 6, no 5, p. 527-539Article in journal (Refereed) Published
Abstract [en]

This article studied the integration of an evaporative gas turbine (EvGT) cycle with chemical absorption for CO2 capture. Two systems of EvGT cycle without CO2 capture and EvGT cycle with CO2 capture were simulated and optimized. The impacts of key parameters such as the water/air ratio (W/A), the stripper pressure, and the flue-gas condensing temperature were studied regarding the electrical efficiency and CO2 reduction. Simulation results show that (1) there always exists an optimum point of W/A for both EvGT and EvGT combined with CCS; (2) although lowering the stripper pressure would lower the heat quality requirement of reboiler, it increases the quantity more obviously. Therefore increasing the operating pressure of stripper would help to increase the total electrical efficiency; but the efficiency improvement becomes smaller if stripper pressure is high; (3) adding a flue-gas condenser to condense out the excessive water is another method to increase the total electrical efficiency. There is also an optimum point of condensing temperature considering the concentration of mono ethanol amine (MEA) and inlet temperature of stripper; and (4) comparatively the combined cycle has a higher gross electricity generation and electrical efficiency than the EvGT cycle no matter if combined with CO2 capture or not.

Place, publisher, year, edition, pages
2009. Vol. 6, no 5, p. 527-539
Keyword [en]
Evaporative gas turbines, Humid air turbines, CO2 capture, Chemical absorption, Electrical efficiency
National Category
Other Environmental Engineering
Identifiers
URN: urn:nbn:se:kth:diva-30217DOI: 10.1080/15435070903231393ISI: 000273991400011OAI: oai:DiVA.org:kth-30217DiVA, id: diva2:399143
Note
QC 20110221Available from: 2011-02-21 Created: 2011-02-21 Last updated: 2017-12-11Bibliographically approved

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