Influence of operating variables on exergetic performance of a combined cycle powered plant (CCPP) with intercooled-compression
- Country : Nigeria
- Subject : Mechanical Engineering
Keywords : Exergy, efficiency, thermo-sustainability, intercooler, Gas-turbine
Abstract
The influence of operating variables (OPV) on the exergetic performance of a CCPP with intercooled compression is presented. The objective is to study the effect of OPV such as ambient temperature (TA), isentropic efficiency, turbine inlet temperature, and pressure ratio at varying intercooler effectiveness (EF) on plant performance and also evaluate the thermo-sustainability indicators at different EF. The results indicate at EF and TA between 0.75 ≤EF≤0.9 and 298 ≤TA≤305 K, the system exergy destruction (ED) decreased by 3.2 % with a 1.2 % reduction in the CCPP components. The EF improved the system efficiency at 90 % by 2.79 % for increasing PR. The exergetic sustainability index (ESI) was 1.2 while the exergy recoverability ratio (ERR) and environmental impact factor (EIF) fluctuated between 0.486 ≤ERR≤0.629 and 1.099 ≤EIF≤2.560. Optimum system efficiency ranged between 60.05 and 60.87 % for optimum EF with ESI of 2.56 compared to 1.2 at normal scenario.
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