Development and Analysis of the Novel Hybridization of a Single-Flash Geothermal Power Plant with Biomass Driven sCO2-Steam Rankine Combined Cycle |
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Authors: | Balkan Mutlu Derek Baker Feyza Kazan |
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Institution: | 1.Department of Mechanical Engineering, Middle East Technical University, Ankara 06800, Turkey; (D.B.); (F.K.);2.Center for Solar Energy Research and Applications (GÜNAM), Ankara 06800, Turkey |
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Abstract: | This study investigates the hybridization scenario of a single-flash geothermal power plant with a biomass-driven sCO2-steam Rankine combined cycle, where a solid local biomass source, olive residue, is used as a fuel. The hybrid power plant is modeled using the simulation software EBSILON®Professional. A topping sCO2 cycle is chosen due to its potential for flexible electricity generation. A synergy between the topping sCO2 and bottoming steam Rankine cycles is achieved by a good temperature match between the coupling heat exchanger, where the waste heat from the topping cycle is utilized in the bottoming cycle. The high-temperature heat addition problem, common in sCO2 cycles, is also eliminated by utilizing the heat in the flue gas in the bottoming cycle. Combined cycle thermal efficiency and a biomass-to-electricity conversion efficiency of 24.9% and 22.4% are achieved, respectively. The corresponding fuel consumption of the hybridized plant is found to be 2.2 kg/s. |
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Keywords: | hybridization single-flash geothermal biomass sCO2 cycle olive residue flexibility |
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