Design of centrifugal compressors for heat pump systems

Andrea Meroni, Benjamin Zühlsdorf, Brian Elmegaard and Fredrik Haglind

Applied Energy, 2018, vol. 232, issue C, 139-156

Abstract: This work presents a mean-line model of a centrifugal compressor and a method for a coupled optimization with a heat pump system. The compressor model was validated with five test cases from the open literature including the working fluids: air, refrigerant R-134a and carbon dioxide. Afterwards, the compressor model was coupled and optimized with that of a heat pump cycle supplying steam at 150 °C. Two cycle configurations were considered: an open-loop system using steam, and a closed-loop system with five other working fluid candidates. The compressor was designed using a multi-objective optimization algorithm, which seeks to maximize simultaneously the cycle coefficient of performance and the supplied heat flow rate. The method employed in this work considers the possible trade-offs regarding cycle and compressor design criteria, and can be used to identify cost-effective solutions for the next generation of heat pumps. The obtained results suggest that a two-stage compressor using steam yields the highest values of coefficient of performance and heat supply, and at the same time requires a more challenging compressor design.

Keywords: Turbocompressor; Validation; Preliminary design; Refrigerant; High-temperature heat pump (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (16)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:232:y:2018:i:c:p:139-156

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DOI: 10.1016/j.apenergy.2018.09.210

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