Abstract
Energy, exergy, environmental and economic (4-E) performance analyses along with an optimization study of a MSW fired combined cycle plant, conceived for an Indian city is reported here. The proposed plant consists of a MSW fired topping indirect-heated air turbine (AT) block and a bottoming reheat-steam turbine (ST) block. MSW generated from the city, after segregation, is allowed to burn in a combustor-heat exchanger (CHR) combined unit to transfer heat to the cycle in indirect manner. It is observed from the study that (in base case scenario), for a compressor outlet pressure (r) of 4 bar, air turbine inlet temperature (ATIT) of 1000 °C, and hot end temperature difference (HETD) of 100 °C for the heat exchanger (HX) of the CHR unit; overall electrical efficiency of the plant is about 44%. It is also observed that at base case, the plant delivers a net electrical output of about 2777 kWe. Exergy analysis at the base case revels that, maximum exergy destruction occurs at the CHR unit. The environmental analysis suggests a sustainability index (SI) of 1.62 and the net annual savings of about $ 78,303 in environmental damage cost, when compared to land-filling. Unit cost of electricity value is found to be about INR 8/kWh (0.1235$/kWh) at the base case. An optimization study is also attempted by considering varying plant design and operating parameters to find out the favourable performance of the plant in all aspects.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call