NUMERICAL ANALYSIS OF A SHROUDED CENTRIFUGAL COMPRESSOR FOR USE IN SUPERCRITICAL CARBONDIOXIDE (S-CO2) BRAYTON CYCLE

Fenil, A and Giri, G and Seshadri, L and Kumar, P and Nasser, A (2023) NUMERICAL ANALYSIS OF A SHROUDED CENTRIFUGAL COMPRESSOR FOR USE IN SUPERCRITICAL CARBONDIOXIDE (S-CO2) BRAYTON CYCLE. In: UNSPECIFIED.

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Abstract

This paper presents the work that entails the design and analysis of a sub megawatt s-CO2 centrifugal compressor. The compressor is intended to be part of a 20 kWe sCO2 Brayton cycle test facility at Indian Institute of Science (IISc) which presently uses a reciprocating compressor. The cycle operates at a maximum temperature of 773K with a flow rate of 45 kg/min and the compressor that feeds the loop must operate between pressures of 21 MPa and 9 MPa whilst rotating at 40000 RPM. The compressor comprising of rotor, vaned diffuser and volute is designed using the AxSTREAM® software suite and is verified numerically using the commercial CFD software ANSYS CFX. Since, initial testing of the compressor will be performed with air, simulations are performed with air as well. A comparison of the flow field revealed that the flow structure in the rotor remains similar at design condition while significant deviation is observed with the vaned diffuser. Copyright © 2023 by ASME.

Item Type:	Conference Paper
Publication:	Proceedings of the ASME Turbo Expo
Publisher:	American Society of Mechanical Engineers (ASME)
Additional Information:	The copyright for this article belongs to ASME.
Keywords:	Brayton cycle; Centrifugal compressors; Centrifugation; Computational fluid dynamics; Well testing, AxSTREAM; CFD analysis; Compressor designs; Compressor performance; Design and analysis; Off-design analysis; S-CO2 brayton cycle; S-CO2 compressor performance; Supercritical carbondioxides; Vaned diffuser, Carbon dioxide
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	30 May 2024 05:50
Last Modified:	30 May 2024 05:50
URI:	https://eprints.iisc.ac.in/id/eprint/84300

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