In a gas turbine combined cycle, the performance guarantees are based on a specific set of base reference conditions. The actual plant performance is measured during a performance test, which usually occurs under conditions different from the base reference conditions. ASME Performance Test Code (PTC) 46, “Performance Test Code on Overall Plant Performance,”  addresses various cycle configurations and the fundamental equations used to correct results at the test condition back to base reference conditions. When the test requires duct firing of the heat recovery steam generator(s), then developing the correction curves poses unique challenges to the cycle engineer. This paper will review the issues and techniques used to develop the appropriate correction curves for the duct-fired combined cycle.
Combined Cycle Performance Test Correction With Duct Firing
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Ip, S, & Soltani, M. "Combined Cycle Performance Test Correction With Duct Firing." Proceedings of the ASME 2005 Power Conference. ASME 2005 Power Conference. Chicago, Illinois, USA. April 5–7, 2005. pp. 1373-1379. ASME. https://doi.org/10.1115/PWR2005-50211
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