Energy Conversion and Management, cilt.252, 2022 (SCI-Expanded)
The natural gas fired combined heat and power system driven by a micro gas turbine engine (M−CHP) of a dairy products company is investigated basing on the actual test data. The system is investigated along with economic analysis and specific cost (SPECO), exergy-cost-energy-mass (EXCEM), modified EXCEM (m-EXCEM) thermoeconomic analyses. The present worth of M−CHP system is estimated to be 241,190.20 US$. According to SPECO method, the cost formation of waste exergy in the M−CHP system is found as 6.634 US$/h, while the combustion chamber component of the system has the maximum (worst) waste exergy cost rate to be 4.366 GJ/h. According to EXCEM method, the waste exergy cost formation of M−CHP system is determined to be 0.563x10-6 GJ/hUS$, while it is estimated as 0.078 GJ/US$ with m-EXCEM method. Among the components of the system, the combustion chamber has the worst waste exergy cost rate.