Techno-economic optimisation of a multi-stage steam compression heat pump using a centrifugal compressor for high-temperature applications

Martin Pihl Andersen*, Simone Parisi, Benjamin Zühlsdorf, Wiebke Brix Markussen, Jonas Kjær Jensen, Fredrik Haglind, Brian Elmegaard

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

High-temperature heat pumps are an attractive solution for recovering excess heat from low-temperature sources in industrial processes, despite facing technological and economic constraints. Reaching high efficiency requires the best match of application and heat pump cycle, considering component limitation and efficiencies. This study investigates the techno-economic potential of a multi-stage steam compression heat pump utilising centrifugal compressors. By coupling a heat pump model with an advanced centrifugal compressor model, the number of compression stages and loads were optimized based on the levelized cost of heat. The analysed cycle provides 1MW of hot water heated from 100 °C to 190 °C with optimal techno-economic performance achieving a coefficient of performance of 4.09 and a levelized cost of heat of 57.2N/MWh with four compression stages and an 80 °C heat source. The results suggest that simultaneous
optimization of the compressor and cycle has limited influence on the design when accurate compressor efficiency approximations are available.
Original languageEnglish
Title of host publicationProceedings of the 26th IIR International Congress of Refrigeration
PublisherInternational Institute of Refrigeration
Publication date2023
Pages1282-1291
Article number0611
ISBN (Electronic)978-2-36215-058-6
DOIs
Publication statusPublished - 2023
Event26th International Congress of Refrigeration - Paris Congress Center, Paris, France
Duration: 21 Aug 202325 Aug 2023

Conference

Conference26th International Congress of Refrigeration
LocationParis Congress Center
Country/TerritoryFrance
CityParis
Period21/08/202325/08/2023
SeriesScience et Technique du Froid
ISSN0151-1637

Keywords

  • Heat pump
  • Water
  • High-temperature
  • Compressor
  • Economy

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