Annex 58 collects, develops and communicates valuable information related to high-temperature heat pumps. This page provides an overview of the latest communication activities related to the project. The dissemination activities include reports, presentations and workshops at conferences, articles in magazines and online webinars.

Task Reports

Annex 58 is organized in four main tasks with technical focus, of which each will be documented by a joint report:

Workshops and selected presentations at international conferences

Annex 58 has contributed to a number of international conferences with workshops and presentations. An overview of selected contributions is given in the following:

  • 29.03.2022 – IEA HPT Annex 58 about HTHPs – State of the art review, demonstration cases and development perspectives at the 3rd High-Temperature Heat Pump Symposium in Copenhagen by B. Zühlsdorf, Jonas Lundsted Poulsen & Florian Schlosser – Presentation
  • 26.10.2022 – High-Temperature Heat Pumps for Industrial Applications – New Developments and Products for Supply Temperatures above 100 °C at China Heat Pump Conference 2022 – Video
  • 25.04.2023 – Annex 58 Workshop at DTI in Aarhus with country presentations including an overview of national HTHP industry, an overview of national HTHP market and perspectives, development perspectives for HTHP technologies and selected RD&D projects by the following countries:
  • 15.05.2023 – Workshop about Decarbonizing process heating with HTHPs – How to exploit the potential? at the 14th IEA HP Conference in Chicago by B. Zühlsdorf, Steven Lecompte & Jonas Lundsted Poulsen – Presentation
  • 24.08.2023 – Workshop about Annex 58 – HTHPs for Decarbonization of Industries at the International Congress of Refrigeration 2023 in Paris by B. Zühlsdorf and C. Arpagaus

Articles in magazines

  • The participants of Annex 58 have contributed with a number of articles to the IEA HPT Magazine Vol. 41 No 1/2023 about Industrial Heat Pumps – Opportunities to Unlock their Full Potential.

Deep Dives

Within Annex 58, a number of Deep Dives on selected topics have been arranged and were typically held as online webinars of 2 h. These Deep Dives involved invited speakers and were open to all interested participants.

The following Deep Dives have been arranged as part of Annex 58:

  • Application potential for high-temperature heat pumps – 15.12.2022
  • Heat-driven heat pump technologies – 03.11.2022
    • Introduction to heat driven heat pumping technologies – Principles, applications and state of the art, Steven Lecompte, University of Ghent
    • Gas-Solid Reactions for thermochemical energy storage and conversion, Marc Linder, DLR
    • Thermal compression heat pumps, Kashif Nawaz, ORNL
    • Heat transformer technology for high-temperature applications, Wouter Ducheyne, CEO and Co-founder, QPinch
  • Working fluid and cycle optimization – 29.22.2021
    • Working fluid and cycle optimization – Performance improvement potentials and how to exploit them, Benjamin Zühlsdorf, DTI
    • Heat pumps based on gas cycles – Technologies, working fluids, applications and perspectives, Panagiotis Stathopoulos, DLR
    • Hybrid compression-absorption heat pumps using water & ammonia – State of the art and ongoing developments, Marcel Ahrens, NTNU
    • Working fluids for high-temperature heat pump systems, Alexander Cohr Pachai, Johnson Controls
    • Thermodynamic analysis of potential refrigerants for high temperature heat pump applications, Valerius Venzik, RWTH Aachen University
  • Steam Generation and MVR – 30.08.2021
    • Analysis of a steam generating high temperature heat pump for industrial waste heat recovery, Sabrina Dusek, AIT
    • Theoretical investigation of HTHP cycles for steam generation, Cordin Arpagaus, OST
    • A steam supply heat pump system, Takenobu Kaida, CRIEPI
    • Overview and developments for steam compression and MVR, Michael Bantle, SINTEF
  • Medium-scale HTHP systems – 08.07.2021
    • Development of high-temperature heat pumps, Tim Hamacher, SPH Sustainable Process Heat
    • Unlocking low carbon heating in high temperature applications, Star Refrigeration, David Pearson
    • Function, design and possible applications of a Rotation Heat Pump at high temperatures, Andreas Längauer, ECOP
  • Medium- and large-scale HTHP systems – 19.05.2021
    • Development of large-scale heat pump systems, German Aerospace Center, Panagiotis Stathopoulos
    • MAN ETES System including tests from pilot plant, MAN Energy Systems, Emmanuel Jacquemoud
    • Application-specific designed large-scale heat pump systems, Andrea Barbon, Turboden
    • Multi-stage steam compression systems, Kjetil Evenmo, EPCON
    • High-Temperature Heat Pumps based on hybrid absorption compression principles, Hybrid Energy
    • High-Temperature Heat Pump based on Sterling principle, Olvondo

Final webinar

The webinar “Outcomes on HPT Annex 58 “High Temperature Heat Pumps” was held on 23rd of April 2024. The webinar focused on the results of Task 1, 2, 3, and 4 and was open to all interested participants.

Webinar presentations