Molten Salt Thermal Energy Storage Materials for Solar Power Generation
Concentrating solar power (CSP) technologies are seen as the Solar Programs most attractive option for meeting utility-scale needs. Innovative research and development activities that will reduce the cost of CSP plants and facilitate their implementation are of prime consideration. Two key opportunities for cost reduction are the development of improved heat transfer fluids and improved methods for thermal storage. This presentation will deal with our research on development of low melting point (LMP) molten salt thermal energy storage media with high thermal energy storage density for sensible heat storage systems. The essential properties of the selected LMP molten salts for thermal storage in solar energy applications are including melting point, heat capacity, density, and thermal energy storage capacity. To develop candidate low melt point salt materials, we used thermodynamic modeling calculations to estimate eutectic compositions of the salt mixtures, heat capacities and densities. Material properties were validated by using experimental techniques including DSC, TGA and other characterization techniques. The energy storage density of new TES molten salts identified are well above the current solar salt. All salt mixtures have melting temperatures in the range of 89-124°C, and energy storage density from 1099 MJ/m3 to 1242 MJ/m3 which is a 45-64％ improvement over the current solar salt (756 MJ/m3).
Molten salts Thermodynamic modeling Energy density Melting point
Ramana G. Reddy
Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL 35487-0202, USA
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-18
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）