Simplified Performance Model of Gas Turbine Combined Cycle Systems
Publication: Journal of Energy Engineering
Volume 133, Issue 2
Abstract
Conventional evaluation approaches for complex technologies, such as gas turbine systems, typically use process simulators for modeling, which are usually complicated and time-consuming. In order to facilitate policy analysis, a simplified desktop model for gas turbine systems based upon the air-standard Brayton cycle is developed in Microsoft EXCEL. The simplified model incorporates key process details and includes a comprehensive cost model. The model is calibrated based on a typical “Frame 7F” heavy duty gas turbine fired with natural gas and syngas. The model generally produces accurate and reasonable estimates for performance and cost comparable to reference data. The model responds appropriately to different syngas compositions, such as based on variation in moisture content and removal. Changes in syngas composition lead to different syngas heating values and thus affect gas turbine performance and cost. The effects of changes in inputs on key outputs are evaluated. Six key inputs are identified that are critical in order to obtain accurate estimates. The simplified model provides detailed technical information in a format that supports strategic planning and analysis.
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Acknowledgments
The work described here is supported by the U.S. Department of Energy (DOE) via a subcontract with Carnegie Mellon University. Any errors here are the responsibility of the writers.DOE
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Information & Authors
Information
Published In
Journal of Energy Engineering
Volume 133 • Issue 2 • June 2007
Pages: 82 - 90
Copyright
© 2007 ASCE.
History
Received: Jul 18, 2005
Accepted: Nov 21, 2005
Published online: Jun 1, 2007
Published in print: Jun 2007
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