STUDY OF COMBINED GAS AND STEAM TURBINE CYCLE WITH PARTIAL STEAM INJECTION AND WITH SOLAR INPUT

Abstract

The Oil Crisis in the 1970’s pressurized the world to seek alternatives to conventional sources of energy. But the ascending rate of air pollution and the issue of global warming have made it the need of the hour to start relying on various non-conventional resources for power generation. To check the situation, efforts are still being made to increase the efficiency of currently employed power cycles while at the same time trying to reduce the particulate emissions. STIG is a wellknown principle to suppress the air pollutants (specifically the NOx emissions) or to increase the power output of a gas turbine. In the present work performance of a combined gas and steam cycle with partial steam injection is evaluated. For this purpose, the simple STIG cycle is modified in a way so as to inject a fraction of steam directly into the combustion chamber of a GT cycle and rest is allowed to expand through the steam turbine. An attempt has also been made to discuss the effect of utilizing solar energy in the system for steam generation along with that generated from heat recovery. The thermodynamic energy analysis has been carried out in this project work. For evaluating the configuration, various parameters were varied and their graphs have been obtained to observe their consequences on the work output, efficiency and specific fuel consumption etc. of the proposed cycle. The simulation of the proposed configuration in this work has been carried out in EES software.