Task 58
Task 58
SHC Task 58

Material & Components for Thermal Energy Storage

Material and Component Development for Thermal Energy Storage

This joint SHC Task 58 / ECES Annex 33 deals with advanced materials for latent and chemical thermal energy storage, Phase Change (PCM) and Thermo Chemical (TCM) materials. The task deals with these materials on three different scales:

  • Material  properties, focused on their behaviour from molecular to bulk scale, including material synthesis, micro-scale mass transport and sorption reactions;
  • Material performance within the storage system , focused on the materials behaviour and when they are implemented in the storage itself, including heat, mass, and vapour transport, wall-wall and wall-material interactions, and reactor design;
  • Storage system implementation, focused on the performance of a storage within a heating or cooling system, including for instance economical feasibility studies, case studies, and system tests.

Because seasonal storage of solar heat for solar assisted heating of buildings is the main focus of the IEA-SHC TCP, this will be one of the primary focus areas of this task. However, because there are many more relevant applications for TES, and because materials research is not and cannot be limited to one application only, this task will include multiple application areas.

Task Information

January 2017December 2019

Dr. Wim van Helden
+31 6 2014 3224


This is a joint Task with IEA ECES Annex 33

What's New
  • Compact heat battery with virtually no heat loss - A compact thermochemical seasonal storage system put up at a demonstration site in Warsaw, Poland, is working as expected. The prototype, developed and tested as part of an EU research project called CREATE, consists of three evacuated modules filled with 400 litres of salt each to store heat with no heat loss by hydrating the material (see the photo on the left). (Posted: 2020-04-24)
  • Compact thermal energy storage: research in cycles - Research into compact thermal energy storage is made difficult by the fact that the performance of storage materials depends significantly on their intended purpose. For example, storage tanks that are integrated into space heating systems are made of materials different from those used to make tanks for process heat loops generating steam. (Posted: 2020-01-08)
  • In search of cost-effective, advanced PCMs - Salt hydrates are the most interesting phase change material in the low-temperature range of up to 150 °C. Their volume-related enthalpy at melting is much higher than the enthalpy of paraffins and sugar alcohols (see the chart above) and they are comparatively inexpensive. (Posted: 2019-12-28)