Abstract
The present study is intended to design and analyze a novel and efficient biomass fired combined cycle power plant, employing a topping air turbine block (fixed 500 kW output) and a bottoming transcritical CO2 turbine block (variable electrical output). Thermodynamic analysis reveals that the plant can deliver about 550 kW power with maximum efficiency of about 45%. Exergy analysis of the plant assesses that the majority of the input exergy is destroyed in the combined combustor-heat exchanger (CCHR) unit. Environmental parameter, i.e., sustainability index (SI) of the plant ranges between 1.4 and 1.7, depending on the plant operational parameters. Year-around CO2 savings from the plant is found significant when compared with a conventional coal based power plant of the same generation capacity. Which in turn, saves about 30,000 $ annually, in terms of environmental damage cost. Economic analysis of the plant indicates that unit cost of electricity ranges between 15 and 20 INR/kWh, depending on the operating conditions.
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Abbreviations
- r p :
-
Pressure ratio (−)
- TIT:
-
Turbine inlet temperature (°C)
- HETD:
-
Hot end temperature difference (°C)
- LHV:
-
Lower heating value (kJ/kg)
- SI:
-
Sustainability index
- η :
-
Efficiency (dimensionless)
- b :
-
biomass
- C :
-
Cost
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Mondal, P., Samanta, S., Ghosh, S., Barman, S.N. (2022). Bio-Waste Fired Gas Turbine and Transcritical Co2 Cycle Based Combined Power Plant: Thermodynamic, Economic and Environmental Performance Assessment. In: Mahanta, P., Kalita, P., Paul, A., Banerjee, A. (eds) Advances in Thermofluids and Renewable Energy . Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-3497-0_22
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