IIR document

Development of ammonia-water hybrid absorption-compression heat pumps.

Number: pap. n. 1869

Author(s) : AHRENS M. U., HAFNER A., EIKEVIK T. M.


In this paper, investigations on the development of industrial high temperature heat pumps are carried out based on the analysis of the current available components. Ammonia-water hybrid heat pumps combine technologies of an absorption and compression heat pump with a mixture of ammonia and water as refrigerant. The functionality of this process was already been proven in the
industrial sector using standard components. In this study, currently available components are investigated for utilization in a hybrid heat pump test facility able to operate at elevated high side pressures to achieve exit temperatures on the secondary fluid side of 140 °C to 180 °C. Critical components are identified and discussed based on defined process requirements. Subsequently, an
overview of available components enabling process parameters with a high side pressure of up to 60 bar are presented and necessary adjustments for the use in the planned test facility are discussed.

Available documents

Format PDF

Pages: 8


  • Public price

    20 €

  • Member price*


* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).


  • Original title: Development of ammonia-water hybrid absorption-compression heat pumps.
  • Record ID : 30026551
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1869


See other articles from the proceedings (632)
See the conference proceedings