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Design for a Heat Pump with Sink Temperatures of 200 °C Using a Radial Compressor

Author

Listed:
  • Julian Unterluggauer

    (Center for Energy, Austrian Institute of Technology, 1210 Vienna, Austria)

  • Verena Sulzgruber

    (Center for Energy, Austrian Institute of Technology, 1210 Vienna, Austria)

  • Clemens Kroiss

    (Institute of Energy Systems and Thermodynamics, TU Wien, 1060 Vienna, Austria)

  • Johannes Riedl

    (Center for Energy, Austrian Institute of Technology, 1210 Vienna, Austria)

  • Reinhard Jentsch

    (Center for Energy, Austrian Institute of Technology, 1210 Vienna, Austria)

  • Reinhard Willinger

    (Institute of Energy Systems and Thermodynamics, TU Wien, 1060 Vienna, Austria)

Abstract

To reduce CO 2 emissions in the industrial sector, high-temperature heat pumps are a key technology. This work presents an approach to design such an industrial heat pump system capable of supplying 200 ° C sink temperature and a capacity of approximately 1 MW. Today’s market-available heat pumps using displacement compressors are not suitable for reaching that high sink temperatures as they need lubricating oil, which is not temperature resistant enough. As a consequence, in this study a transcritical heat pump cycle using a two-stage oil-free radial compressor is investigated. Based on preliminary studies, R1233zd(E) is chosen as a refrigerant. The procedure couples 1D thermodynamic cycle simulations with a radial compressor mean-line design model. A preliminary geometry for a compressor with and without inlet guide vanes is presented, and compressor maps including the compressors behaviour in off-design are calculated. The compressor design is then imported into a 1D simulation to analysis the performance of the heat pump in the whole operating range. In the analysis, the application of a fixed inlet is evaluated, and an improvement of approximately 21% and 16% of the isentropic efficiency is achieved. The thermodynamic simulations showed a maximum COP of approximately 2.8 and a possible operating range of 0.5 to 1.3 MW thermal power. Furthermore, a techno-economical analysis by means of a deep-fryer use case showed reasonable payback times of between 2 and 10 years, depending on the electricity to gas price ratio.

Suggested Citation

  • Julian Unterluggauer & Verena Sulzgruber & Clemens Kroiss & Johannes Riedl & Reinhard Jentsch & Reinhard Willinger, 2023. "Design for a Heat Pump with Sink Temperatures of 200 °C Using a Radial Compressor," Energies, MDPI, vol. 16(13), pages 1-21, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:4916-:d:1178075
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    References listed on IDEAS

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    1. Lecompte, Steven & Huisseune, Henk & van den Broek, Martijn & Vanslambrouck, Bruno & De Paepe, Michel, 2015. "Review of organic Rankine cycle (ORC) architectures for waste heat recovery," Renewable and Sustainable Energy Reviews, Elsevier, vol. 47(C), pages 448-461.
    2. Moein Shamoushaki & Pouriya H. Niknam & Lorenzo Talluri & Giampaolo Manfrida & Daniele Fiaschi, 2021. "Development of Cost Correlations for the Economic Assessment of Power Plant Equipment," Energies, MDPI, vol. 14(9), pages 1-19, May.
    3. Meroni, Andrea & Zühlsdorf, Benjamin & Elmegaard, Brian & Haglind, Fredrik, 2018. "Design of centrifugal compressors for heat pump systems," Applied Energy, Elsevier, vol. 232(C), pages 139-156.
    4. Schiffmann, J. & Favrat, D., 2010. "Design, experimental investigation and multi-objective optimization of a small-scale radial compressor for heat pump applications," Energy, Elsevier, vol. 35(1), pages 436-450.
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