Technical and economic working domains of industrial heat pumps: Part 2 - ammonia-water hybrid absorption-compression heat pumps

Jonas Kjær Jensen, Torben Schmidt Ommen, Wiebke Brix Markussen, Lars Reinholdt, Brian Elmegaard

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    Abstract

    The ammonia-water hybrid absorption-compression heat pump (HACHP) has been proposed as a relevant technology for industrial heat supply, especially for high sink temperatures and high temperature glides in the sink and source. This is due to the reduced vapour pressure and the non-isothermal phase change of the zeotropic mixture, ammonia-water. To evaluate to which extent these advantages can be translated into feasible heat pump solutions, the working domain of the HACHP is investigated based on technical and economic constraints. The HACHP working domain is compared to that of the best available vapour compression heat pump with natural working fluids. This shows that the HACHP increases the temperature lifts and heat supply temperatures that are feasible to produce with a heat pump. The HACHP is shown to be capable of delivering heat supply temperatures as high as 150 °C and temperature lifts up to 60 K, all with economical benefits for the investor.
    Original languageEnglish
    JournalInternational Journal of Refrigeration
    Volume55
    Pages (from-to)183-200
    ISSN0140-7007
    DOIs
    Publication statusPublished - 2015

    Keywords

    • Industrial heat pumps
    • Working domain
    • Absorption-compression heat pump
    • Economic evaluation
    • Natural refrigerants

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