Indian Journal of Science and Technology

Abstract

Background/Objectives: The performance of twin-shaft gas turbine for power generation applications has been studied under different environmental conditions. This paper presents a twin-shaft cooled gas turbine design and off-design model. Methods/Statistical Analysis: A complete analysis was conducted for components integration and matching of the studies gas turbine at base and part loads conditions. The required characteristic curves of each component were produced in a separate study using full three-dimensional numerical simulations validated with available experimental data. A computer code in visual FORTRAN language has been developed which was capable of calculating the thermodynamic properties at all sections of the gas turbine engine. Findings: The proposed model was used to simulate the steady state behavior of power generation application of the gas turbine to study the effects of different parameters such as ambient conditions and loads. The code is completely capable of predicting the engine performance both in design and off-design conditions. The results of simulation are presented at the part load and different ambient conditions and are validated with test measurement data. The results show good agreement between the experimental data and analytic model. Application/Improvements: The model can be adapted for any single and twin-shaft industrial gas turbine using appropriate characteristic curves for each separate engine.

Keywords: Design Point, Off Design Condition, Twin-Shaft Industrial Gas Turbine, Zero Dimensional Model