TUESDAY, November 21 -- 2:00 PM - 3:30 PM (GMT/UTC)
THURSDAY, November 23 -- 6:00 am - 7:30 AM (GMT/UTC)

Thermal Energy Storage MaterialsIn this webinar, you will learn about the latest R&D activities in compact thermal energy storage materials. Presenters will address the development of testing methods to characterize the materials, explore reliable techniques to measure the state-of-charge in compact thermal energy storage, and provide insights into the comprehensive evaluaton of stability of the materials.

Q/A Session: This 90-minute webinar will include a 30-minute Q/A session and a recording of the webinar will be available online afterwards.

The webinar is organized by the Solar Academy of the IEA Solar Heating and Cooling Programme and hosted by ISES, the International Solar Energy Society.

Webinar Recordings

November 21, 2023

November 23, 2023


Wim van Helden

Wim van Helden

Wim van Helden studied Technical Physics, and since 2014 he is working with AEE INTEC in Gleisdorf, Austria, where he is a Senior Expert in Thermal Energy Storage. In addition, he is working as an independent consultant in the area of thermal energy storage and solar thermal technologies. He has experience in leading national and international research and demonstration projects, developing large-scale Thermal Energy Storage and compact Thermal Energy Storage.  

Wim is a Board Member of the European Technology and Innovation Platform on Renewable Heating and Cooling (RHC-ETIP) and a member of the scientific committee of IRES (International Renewable Energy Storage) conference. He is leading Task 39 on Large Thermal Energy Storage for District Heating in the IEA Energy Storage Programme (IEA ES) and Task 67 on Compact Thermal Energy Storage Materials in the IEA Solar Heating and Cooling Programme (IEA SHC).

Presentation: An Introduction to Compact Thermal Energy Storage Materials

Helena Navarro

Helena Vavarro

Helena Navarro is a Senior Researcher in Chemical Engineering at the University of Birmingham (UoB). She received her Ph.D. degree in 2013 at Universitat de Barcelona in Materials Science and Technology. Her research focuses on the development of thermal energy storage solutions from a laboratory scale towards commercialization both in academic and industrial environments, decarbonizing heating, cooling, transport, and industry which includes thermal and thermochemical energy storage materials, recovery of waste heat and waste cold, scalable and intelligent manufacturing technologies for thermal and thermochemical energy storage and heat transfer intensification. She currently leads the IEA SHC Task 67´s Subtask A1.1 on thermal conductivity and thermal diffusivity of liquids, solids, and packed beds (standardized measurement procedures and Round-Robin tests).

Presentation: Round Robin Test on Thermal Conductivity/Thermal Diffusivity

Gerald Englmair

Gerald Englmair

Gerald Englmair is an Assistant Professor at the Department of Civil and Mechanical Engineering, Technical University of Denmark (DTU). He received his Ph.D. degree in 2019.

His research focuses on compact thermal energy storage for flexible (solar) heating and cooling systems - including experimental development and demonstration. His work contributes to Danish and international projects. He is leading the IEA SHC Task 67´s Subtask on State of Charge Determination and is Deputy Chair of the thermal storage working group at the Danish Center for Energy Storage.

Gerald teaches in Denmark and Greenland. He has 10 years of research experience - working in Denmark, China, and Austria after graduating as an Energy Engineer from FH Upper Austria.

Presentation: State of Charge Determination Utilizing Material Response in Compact Thermal Energy Storages

Ángel Serrano Casero


Ángel received his Ph.D. in Chemical and Environmental Engineering from the University of Castilla-La Mancha (UCLM) in 2018. Currently, he works as an Associate Researcher at CIC energiGUNE, specializing in thermal energy storage (TES) since joining the phase change materials and critical behavior group in 2018. Since 2023, he also works as research line manager of the TES technologies research line. Ángel's expertise is in developing phase change materials for energy storage across a wide temperature range (40°C-600°C) and he is actively involved in industrial, national, and European projects.

Presentation: Stability Mapping with Examples of PCMs and TCMs


Bärbel Epp - Moderator

Barbel Epp

Bärbel Epp is the founder and managing director of the German consultancy solrico. She is responsible for the international newsletter of the web portal www.solarthermalworld.org, reporting exclusively about market and technology trends in the solar heating and cooling sector globally. solrico also created the first online world map of SHIP suppliers (SHIP = Solar Heat for Industrial Processes) and carries out surveys among the around 70 companies listed on the world map annually. Bärbel Epp graduated in Physics from the University of Oldenburg, Germany.