Main Activities
• Develop standardized measurement procedures for CTES materials and further expand and maintain the materials database and knowledge database.
• Identify proper strategies that allow for tuning the reactivity of CTES materials, thus improving their properties and final performances.
• Develop techniques with which the SoC of a CTES can be determined in a reliable and cost-efficient way.
• Develop PCM and TCM with predictable and improved stability.
• Improve material-component interaction for optimal system performance.
• Disseminate the achieved knowledge and results to experts, system integrators, decisionmakers, and the public.
CTES technologies are the subject of the Task. These technologies are based on the classes of phase change materials (PCM) and thermochemical materials (TCM). Materials from these classes will be studied, improved, characterized, and tested in components. The main components for these technologies are heat exchangers and reactors, which are also studied and further improved in the Task. The temperatures of the heat that the thermal storage will supply are determined by the areas of application and range from 0°C to 20°C for cooling purposes, from 40°C to 95°C for buildings, between 60°C and 130°C in DHC networks, and 80°C to more than 500°C for industry and vehicles. Due to the underlying physical and chemical processes, the charging and discharging temperatures, especially with TCM, can have very different values, with charging temperatures determined mainly by the applied heat source.
The Task is organized into five subtasks:
Subtask A: Material Characterization and Database (Lead Country: Austria)
The Subtask's main objective is to develop and validate several standardized measurement procedures for CTES materials
and further expand and maintain the materials and knowledge databases.
Subtask B: CTES Material Improvement (Lead Country: Spain)
The Subtask's main objective is to identify proper strategies that allow for tuning the reactivity of CTES materials,
thus improving their properties and final performances.
Subtask C: State of Charge – SoC Determination (Lead Countries: Denmark (PCM) and Canada (TCM))
The Subtask's main objective is to develop techniques with which the SoC of a CTES can be determined in a reliable and
cost-efficient way.
Subtask D: Stability of PCM and TCM (Lead Country: Germany)
The Subtask's main objective is to arrive at PCM and TCM with predictable and improved stability.
Subtask E: Effective Component Performance with Innovative Materials (Lead Countries: Switzerland (TCM) and Spain (PCM))
The Subtask's main objective is to improve material-component interaction for optimal system performance.
More information about the work, methods and outcomes will become available in the second half of 2024, with the final
reporting of Task67.
Link: IEA SHC Task 67
