CSP research infrastructure is typically used to assess the performance of prototypes of new components or
processes. In order to perform an appropriate performance assessment, a characterization of the heat transfer
fluids is necessary. An important service of the research facility is to provide precise data for these materials.
The objective of this work package is to perform researches in order to improve the quality of both performances
and procedures regarding laboratory investigations, and to develop a software facility (to be implemented within
the SFERA II web site), where the main characteristics of each feasible HTF/HSM for CSP applications (from
literature and where necessary completed by laboratory tests) are reported along with the related components
characteristics and application areas.


This WP can be divided in three major parts:
Task 1: Definition of test protocols for material and component investigations:
• Identify standardized test conditions for chemical/physical measurements
• Development of test protocols for HSM/HTF thermal stability studies, and definition of common criteria for
results analysis
• Definition of standardized test procedures for corrosion investigations

Task 2: Improvement of laboratory test equipment for:
• Increase of the allowed analysis temperature range, from ambient up to very high temperatures (with a final
aim of 1000° C), for chemical/physical analysis, by new hardware acquisition and by upgrading the present
• Development of a laboratory scale experimental rig for thermal stability studies of HTF/HSM in the most
common environmental conditions, including the possibility to obtain kinetics law for the reaction involved
• Measurement techniques for molten salts as HTF/HSM at high temperatures (up to 700° C)

Task 3: With the final aim to develop the described electronic database, the following subtasks will be
implemented. In particular, the research will be focused on the following materials:
Molten salts (nitrates/nitrites mixtures)
Solids as HSM
Gases as HTF
Phase Change Materials (PCM)
Chemical storage systems
Nanoparticles materials
• A complete literature review on characteristics of the already proposed HTF/HSM will be carried out. Ranking
criteria with respect to costs, availability, thermophysical and corrosion properties will be decided among the
partners, and the materials will be classified accordingly.
• Chemical/physical data concerning the mixtures considered the most promising and/or interesting will be
eventually experimentally completed.
• By assessing all the features concerning these fluids, including all information on the related components and
technical employments, a complete data set will be assessed, where all the data already present in the scientific
literature will be validated, completed and added to the experimental results obtained from this project. In this
way all data of feasible HTF/HSM for CSP implementations will be collected, compared and ranked with respect
to their thermal properties, rheometric characteristics, costs, availability, and applications. This database will be
implemented inside the SFERA shared website.