To develop innovative designs and components for medium and high temperature thermal storage, to deliver solutions to meet renewable energy storage needs.

   – NAITEC goals: 
Analyse the behaviour of different steels against the corrosive power of molten salts at high temperatures in order to suggest rooms for improvement (new coatings, new steel treatment processes,…) for their protection.

   -Objective of our partners:
Apart from the technical developments, the objective is to create a multidisciplinary collaboration group made up of different SINAI centres focused on the development and research of high-temperature thermal storage systems.

-Our goal:
Development of low-cost advanced high-temperature thermal storage systems. To do this, we have worked on three fundamental lines:

1- Improve the performance of molten salts. Salts with greater capacity and resistant to higher temperatures (>600ºC).

2-Development of materials with greater resistance to corrosion generated by these salts.

3- Development of PCM (Phase Change Materials) design seeking to improve the energy density and thermal behaviour of the heat storage system.

-What has been developed:
New salt formulations have been developed with less degradation at high temperatures than solar salt. This presents great potential for storage.
A high temperature corrosion test procedure. Likewise, certain coatings have been discarded and the door has been opened for a new range of coatings, heat treatments that could increase protection against corrosion.

A PCM-based methodology has been developed that allows optimal heat storage behaviour.

 

Project financed by the Government of Navarre