Energy Efficiency and Safety Enhancement in Regenerative Gas Turbines: An Integrated Assessment for Vehicle Applications
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Abstract
In this study, we conducted a comprehensive analysis employing energy and exergy concepts to assess the impact of dynamic ambient conditions on a regenerative gas turbine (RGT) cycle's performance. The RGT, known for improved fuel efficiency and reduced consumption, offers lower environmental impact and diminished greenhouse gas emissions. Owing to these benefits, RGTs find extensive use in marine propulsion systems, including naval ships, warships and commercial vessels as well as submarines. We collected hourly data on temperature and relative humidity for Vijayawada city, India, during its hottest months - March, April, May and June of 2023. This data facilitated the evaluation of key parameters such as network output, thermal efficiency and exergy destruction rates within the RGT cycle. We compared the results under actual conditions with those under idealized International Organization for Standardization (ISO) conditions. The study underscores the significant role of compressor input temperature and relative humidity on RGT cycle performance. Notably, our findings revealed a significant decrease in exergy destruction within the combustion chamber, with rates varying from 0.4 MW to 1.79 MW between 2:30 a.m. and 5:30 p.m. in May.
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