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REslag, Energy Storage for Concentrated Solar Power

2018.05.23     From: helioscsp

RESLAG is a European project that develops solutions for the valorisation of steel slag through 4 eco-innovative industrial alternative applications that will be proved in 4 large scale demonstration pilots.


Slag as Thermal Energy Storage system feedstock for Concentrated Solar Power applications.


RESLAG project aims to remove the constrains that current storage technologies for Concentrated Solar Power application have. Two different Thermal Energy Storage concepts will be validated to define new storage systems based in new materials and fluids that will facilitate the integration of the renewable energies in the electric grid.


Pilot a: Thermal Energy Storage system using air as heat transfer fluid (HTF) (led by DLR)


The objective of the pilot a is to demonstrate the viability of air and steel slag to obtain an effective storage at higher temperature (830ºC) for solar central receiver systems.


Pilot a conceptual scheme which use air as HTF


The concept demonstrator pilot will be based on an existing test bed for high-temperature storage at DLR Germany, HOTREG:




Pilot b: Thermal Energy Storage system using molten salt as heat transfer fluid (HTF) (led by ENEA)


The key point of this technology is the replacement of the molten salt for low-cost steel slag, obtaining more cost-effective and efficient systems.


This pilot will consist in developing a storage tank system operating in the typical molten salt temperature range (approx. 300-560 ºC), in which molten salt is partially replaced by steel slag as energy storage material.


Pilot b conceptual scheme which use molten salt as HTF.


This pilot will be carried out in the Concentrated Solar Power plant of ENEA Casaccia research Centre (Italy).




Different components of the parabolic trough collector loop research facility in ENEA


Relevant CSP Conference:CSP Focus MENA 2018(June 27-28,Marrakeck Morocco)

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