Journal article
Design of centrifugal compressors for heat pump systems
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.
Language: | English |
---|---|
Year: | 2018 |
Pages: | 139-156 |
ISSN: | 18729118 and 03062619 |
Types: | Journal article |
DOI: | 10.1016/j.apenergy.2018.09.210 |
ORCIDs: | Meroni, Andrea , Zühlsdorf, Benjamin , Elmegaard, Brian and Haglind, Fredrik |