Development of User Gas Turbine Performance Calculation Tool Based on the ASME PTC 22 Code

Abstract This paper presents the development of a gas turbine performance calculation tool based on the ASME PTC 22 Code. The tool evaluates gas turbines’ performance in various scenarios, including test-bench, site-specific, and contractual conditions. It has been extensively evaluated and refined to ensure greater reliability and accuracy. The tool was developed in-house to independently evaluate gas turbine performance without relying on the Original Equipment Manufacturer (OEM) or third-party assessments. It integrates a model that considers three streams instead of the two used in the PTC 22, enabling a more precise evaluation of heat radiation and secondary flows. The tool also converts site-specific measurements to both ISO and contractual conditions using the manufacturer’s specific correction curves. Additionally, it calculates a wider range of parameters such as compressor isentropic efficiency, compressor power, high-pressure (HP) and low-pressure (LP) turbine isentropic efficiencies and associated power, exhaust heat, exhaust flow, and turbine inlet temperature (TIT). Developed using Python, the tool operates through a main program that applies the ASME PTC 22 methodology and additional calculations for relative humidity input data and CO2 emissions based on fuel composition. Finally, this gas turbine performance tool is used on-site to evaluate gas turbine performance and verify its degradation over the continuous 24/7/365 operational regime. Future developments aim to connect this in-house performance calculation tool to the Company’s data system to enable real-time gas turbine monitoring.