The European electric power industry has undergone considerable changes over the past two decades as a result of more stringent laws concerning environmental protection along with the deregulation and liberalization of the electric power market. However, the pressure to deliver solutions in regard to the issue of climate change has increased dramatically in the last few years and has given rise to the possibility that future natural gas-fired combined cycle (NGCC) plants will also be subject to capture requirements. At the same time, the interest in combined cycles with their high efficiency, low capital costs, and complexity has grown as a consequence of addressing new challenges posed by the need to operate according to market demand in order to be economically viable. Considering that these challenges will also be imposed on new natural gas-fired power plants in the foreseeable future, this study presents a new process concept for natural gas combined cycle power plants with capture. The simulation tool IPSEpro is used to model a 400 MW single-pressure NGCC with post-combustion capture using an amine-based absorption process with monoethanolamine. To improve the costs of capture, the gas turbine GE 109FB is utilizing exhaust gas recirculation, thereby, increasing the content in the gas turbine working fluid to almost double that of conventional operating gas turbines. In addition, the concept advantageously uses approximately 20% less steam for solvent regeneration by utilizing preheated water extracted from heat recovery steam generator. The further recovery of heat from exhaust gases for water preheating by use of an increased economizer flow results in an outlet stack temperature comparable to those achieved in combined cycle plants with multiple-pressure levels. As a result, overall power plant efficiency as high as that achieved for a triple-pressure reheated NGCC with corresponding removal facility is attained. The concept, thus, provides a more cost-efficient option to triple-pressure combined cycles since the number of heat exchangers, boilers, etc., is reduced considerably.
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April 2011
Research Papers
Novel High-Performing Single-Pressure Combined Cycle With Capture
Nikolett Sipöcz,
Nikolett Sipöcz
Department of Mechanical and Structural Engineering and Material Science,
University of Stavanger
, N-4036 Stavanger, Norway
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Klas Jonshagen,
Klas Jonshagen
Division of Thermal Power Engineering, Department of Energy Sciences,
Lund University
, P.O. Box 118, S-221 00 Lund, Sweden
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Mohsen Assadi,
Mohsen Assadi
Department of Mechanical and Structural Engineering and Material Science,
University of Stavanger
, N-4036 Stavanger, Norway
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Magnus Genrup
Magnus Genrup
Division of Thermal Power Engineering, Department of Energy Sciences,
Lund University
, P.O. Box 118, S-221 00 Lund, Sweden
Search for other works by this author on:
Nikolett Sipöcz
Department of Mechanical and Structural Engineering and Material Science,
University of Stavanger
, N-4036 Stavanger, Norway
Klas Jonshagen
Division of Thermal Power Engineering, Department of Energy Sciences,
Lund University
, P.O. Box 118, S-221 00 Lund, Sweden
Mohsen Assadi
Department of Mechanical and Structural Engineering and Material Science,
University of Stavanger
, N-4036 Stavanger, Norway
Magnus Genrup
Division of Thermal Power Engineering, Department of Energy Sciences,
Lund University
, P.O. Box 118, S-221 00 Lund, SwedenJ. Eng. Gas Turbines Power. Apr 2011, 133(4): 041701 (8 pages)
Published Online: November 22, 2010
Article history
Received:
April 13, 2010
Revised:
May 3, 2010
Online:
November 22, 2010
Published:
November 22, 2010
Citation
Sipöcz, N., Jonshagen, K., Assadi, M., and Genrup, M. (November 22, 2010). "Novel High-Performing Single-Pressure Combined Cycle With Capture." ASME. J. Eng. Gas Turbines Power. April 2011; 133(4): 041701. https://doi.org/10.1115/1.4002155
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