Thermo-physical Properties of a Steel-making by-product to be used as Thermal Energy Storage Material in a Packed-bed System

Abstract In this paper the valorisation of an industrial and cheap by-product from the steel manufacturing, Electric Arc Furnace slag, is studied as new thermal energy storage material in a packed-bed system. For this application, the driving thermo-physical and the thermal and chemical stability of two different slags have been studied. The obtained results have revealed that this material presents similar properties to other materials typically studied as filler/thermal energy storage material in a packed-bed arrangement. The thermal stability and compatibility analysis have indicated that the slag is stable, at least up to 1000 °C when working in direct contact with air as heat transfer fluid. In addition, in this work, a heat storage system based on air-packed bed configuration is proposed. In this frame, different operation methods have been computationally analysed in order to maximize the storage capacity and efficiency of the packed-bed design. Overall, this work has demonstrated the high potential of this waste material to obtain an efficient and cost-effective thermal energy storage solution.

[1]  Juan Rodríguez-Carvajal,et al.  Recent advances in magnetic structure determination by neutron powder diffraction , 1993 .

[2]  Irena Report.  Renewable Power Generation Costs in 2012: An Overview , 2012 .

[3]  Patrick Echegut,et al.  Thermal storage material from inertized wastes: Evolution of structural and radiative properties with temperature , 2012 .

[4]  Luisa F. Cabeza,et al.  State of the art on high-temperature thermal energy storage for power generation. Part 2--Case studies , 2010 .

[5]  Luisa F. Cabeza,et al.  Experimental characterization of a solid industrial by-product as material for high temperature sensible thermal energy storage (TES) , 2014 .

[6]  Luisa F. Cabeza,et al.  State of the art on high temperature thermal energy storage for power generation. Part 1—Concepts, materials and modellization , 2010 .

[7]  R. Saini,et al.  A review on packed bed solar energy storage systems , 2010 .

[8]  A. Steinfeld,et al.  Packed-bed thermal storage for concentrated solar power: Pilot-scale demonstration and industrial-scale design , 2012 .

[9]  Greg C. Glatzmaier,et al.  Compatibility of a post-industrial ceramic with nitrate molten salts for use as filler material in a thermocline storage system , 2013 .

[10]  Elias K. Stefanakos,et al.  Thermal energy storage technologies and systems for concentrating solar power plants , 2013 .

[11]  Luisa F. Cabeza,et al.  Selection and characterization of recycled materials for sensible thermal energy storage , 2012 .

[12]  H. Johnstone,et al.  Heat and mass transfer in packed beds , 1955 .

[13]  K. Vafai,et al.  Analysis of Variants Within the Porous Media Transport Models , 2000 .

[14]  R. Tamme,et al.  Solid media thermal storage for parabolic trough power plants , 2006 .

[15]  S. Khare,et al.  Selection of materials for high temperature sensible energy storage , 2013 .

[16]  Patrick Echegut,et al.  Recycled Material for Sensible Heat Based Thermal Energy Storage to be Used in Concentrated Solar Thermal Power Plants , 2011 .