Heat Conversion - HCV -

The Heat Conversion group researches and further develops the field of heat conversion via chillers and heat pumps. Its range of research extends from the development and optimisation of individual components to their integration into complex energy systems. Many years of expertise have accumulated in the group, particularly on sorption heat pump and cooling systems (closed absorption, open adsorption), sorption storage systems, and innovative compression refrigeration applications.

The main work focuses are:

  • Research on thermal fluid dynamics, heat transfer, and fluid process engineering
  • Heat pump cycle design, optimised circuits, methods for increasing efficiency
  • Design, construction, and testing of thermally or electrically driven chillers and heat pumps
  • Identification of promising applications for innovative heat pump solutions and adaptation or adapted development of such
  • Planning and integration of innovative heat pump solutions into complex energy systems, including operational support and optimisation
  • Design of plants and energy systems for cooling and heating in the fields of trigeneration, solar air conditioning, waste heat utilisation, cooling with biomass, and cooling with district heat

Head of Group:
Manuel Riepl, M.Sc
Walther-Meißner-Str. 6
85748 Garching
Tel.: +49 89 329442-43
Fax: +49 89 329442-12

Deputy Head of Group:
Andreas Krönauer, M.Eng.
Walther-Meißner-Str. 6
85748 Garching
Tel.: +49 89 329442-13
Fax: +49 89 329442-12

Services & Equipment


  • Modelling and simulation of thermodynamic cycle processes
  • Basic process engineering of components, systems, and plants as well as their practical implementation
  • Basic theoretical and experimental investigations, all focused on application
  • Identification of promising applications for innovative heat transformation methods and their implementation
  • Highly developed prototyping
  • Energy system analysis, source-sink analysis, integrability of storages and heat pumps for waste heat utilisation
  • Planning support and metrological monitoring for demonstration projects
  • Economic feasibility studies


  • Thermal analysis laboratory for static and/or dynamic measurement of heat pumps and chillers up to approx. 200 kWth (hardware in the loop)
  • Vacuum testing systems for measuring components under sub-atmospheric conditions
  • Test setup for determination of vapour-liquid equilibria of aqueous solutions
  • Leakage testing of vacuum systems or high vacuum systems (helium leakage testing system)
  • System for corrosion testing in aqueous salt solution environments
  • Comprehensive software models for static and dynamic modelling of sorption and compression heat pumps at component and system level

ZAE Bayern

We conduct applied research at the interface between basic science and industrial application. Our methods and systems aim to achieve CO2 neutrality through the intelligent and efficient use of renewable energies.

Annual Report

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