Webinar – Reversible adsorption chillers for geothermal heating and cooling, 4 July 2025
Focus on Geothermal webinar - Geothermal Reversible Adsorption Chillers - Unlocking the Full Potential of Geothermal Energy for District Heating and Cooling
Carlo Cariaga
30 Jun 2025
Join us on 4 July 2025 for a webinar on the reversible adsorption systems and how they can provide both heating and cooling from geothermal resources.
As part of the regular Focus on Geothermal Webinar series – a partnership of Enerchange and ThinkGeoEnergy, we are proud to host Ludwig Irrgang of the Technical University of Munich for a webinar on “Geothermal Reversible Adsorption Chillers – Unlocking the Full Potential of Geothermal Energy for District Heating and Cooling.”
Other webinar details are as follows:
Date: 4 July 2025
Time: 14:00 CEST
Registration: Click here to register
Speaker: Ludwig Irrgang, Research Assistant, Technical University of Munich
Deep geothermal energy has significant potential to contribute to the decarbonization of the urban heating sector. Particularly in cities such as Munich and Vienna, where deep geothermal energy is accessible and district heating network infrastructure is already available. Given the strong seasonal variation in heat demand under European climate conditions, technologies such as absorption chillers, heat pumps, and heat transformers can be used to optimize geothermal energy utilization and reduce the necessity for other energy sources such as fossil fuels.
To increase the annual operating hours of absorption systems, a reversible absorption machine is proposed. This design enables cold production
during the summer and enhanced heat extraction from the geothermal source during the winter. In order to demonstrate the reversible concept, an absorption heat pump test rig, which combines the three operating modes, chiller, heat pump, and heat transformer, was designed and is currently put into operation at the Chair of Energy Systems of the Technical University of Munich.
This talk explores the application potential of absorption technology in the context of geothermal energy. It provides a concise overview of the different absorption cycles—chiller, heat pump, and heat transformer—and illustrates how these three operating modes can be integrated into a single system. The GeoReACh test rig will be introduced, and the planned experimental scope will be outlined and opened up for discussion.
Ludwig Irrgang holds a Bachelor’s Degrees in Physics and in Engineering Science and a Master’s Degree in Energy and Process Engineering from the Technical University of Munich. He is currently a Research Assistant at the TU Munich working on projects related to cooling from geothermal energy, air condensers for ORCs, and integration of heat pumps with geothermal resources.
