Analysis of a 10 MW recompression supercritical carbon dioxide cycle for tropical climatic conditions

Sathish, S and Kumar, P and Nassar, A (2021) Analysis of a 10 MW recompression supercritical carbon dioxide cycle for tropical climatic conditions. In: Applied Thermal Engineering, 186 .

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Abstract

Recompression supercritical CO2 (sCO2) power cycles offer higher efficiencies over other sCO2 cycle configurations. This paper addresses the design of a 10 MW sCO2 recompression cycle suitable for tropical climates with a compressor inlet temperature of 45 °C and a maximum turbine inlet temperature of 565 °C to facilitate the use of conventional steel alloys. A design space analysis is carried out by incorporating individual component performance under various operating conditions. The proposed cycle uses a single two-stage axial turbine and two single-stage centrifugal compressors. The results are presented on an efficiency-net-specific work diagram showing the Pareto optimal curves for a range of recompression fractions. The optimum cycle parameters, pressure ratio, and recompression fraction are found to be 2.0 and 0.25, respectively, yielding a design point efficiency of 35. The paper brings forth the effect of turbomachinery and heat exchangers sized for 45 °C compressor inlet temperature and 565 °C turbine inlet temperature on off-design cycle performance. The analysis is applied to develop strategies for optimally operating the recompression cycle at part load and off-design conditions. © 2020

Item Type:	Journal Article
Publication:	Applied Thermal Engineering
Publisher:	Elsevier Ltd
Additional Information:	The copyright of this articles belongs to Elsevier Ltd
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	09 Feb 2021 09:37
Last Modified:	09 Feb 2021 09:37
URI:	http://eprints.iisc.ac.in/id/eprint/67790

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