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Novel Supercritical Carbon Dioxide Cycle for a Waste Recovery Application

Hoque, SJ and Kumar, P (2023) Novel Supercritical Carbon Dioxide Cycle for a Waste Recovery Application. In: 3rd Biennial International Conference on Future Learning Aspects of Mechanical Engineering, FLAME 2022, 3-5 August 2022, Noida, pp. 51-56.

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Official URL: https://doi.org/10.1007/978-981-99-2382-3_4


Superior performance, quick response to variable load, and compactness make supercritical CO2 (sCO2) power cycles suitable for waste heat recovery (WHR) applications. This paper proposes a novel sCO2 WHR cycle for high-temperature (>300 °C) applications. The proposed cycle incorporates two recovery heat exchangers, two recuperators, two turbines, and a single compressor. A comprehensive thermodynamic analysis of the novel sCO2 WHR cycle is presented for utilizing the waste heat of gas turbine exhaust. The influence of cycle parameters on cycle performance in the context of a WHR cycle is discussed. The low side, high side pressures, and the mass flow split ratio between the high-temperature and low-temperature turbines are optimized for maximum power rather than thermodynamic cycle efficiency. The performance of the proposed cycle is compared with other sCO2 cycles operating under similar conditions. The analysis shows that the proposed cycle produces high performance while significantly reducing heat exchanger sizes. Additionally, the cycle exhibits significantly stable performance under off-design conditions and offers a more comprehensive operating range than the standard sCO2 WHR cycles cited in the literature. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

Item Type: Conference Paper
Publication: Lecture Notes in Mechanical Engineering
Publisher: Springer Science and Business Media Deutschland GmbH
Additional Information: The copyright for this article belongs to the Springer Science and Business Media Deutschland GmbH.
Keywords: Heat exchangers; High temperature applications; Supercritical fluid extraction; Temperature; Thermoanalysis; Waste heat; Waste heat utilization, Energy systems; Heat recovery cycle; Highest temperature; Internal recuperation; Performance; Quick response; Supercritical carbondioxides; Supercritical CO 2; Waste recoveries; Waste-heat recovery, Carbon dioxide
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 05 Nov 2023 08:30
Last Modified: 05 Nov 2023 08:30
URI: https://eprints.iisc.ac.in/id/eprint/83082

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