Solar-Thermal Energy Conversion and Storage: Conductive Heat Transfer Using Bulk Graphite
Concentrated solar power (CSP) highlights the fact that there is substantially more energy in the sun’s heat than there is in its light. However, solar-thermal energy conversion and storage systems using CSP are handicapped by challenges associated with storage technologies, especially high pressures and corrosion. In assessing the possibilities for new materials and designs, issues of thermal properties and heat transfer must be considered. While current technologies largely utilise convective heat transfer of liquids, a promising approach is the use of conductive heat transfer with highly aligned graphite in air as the storage material at temperatures ≤600 ℃. Modelling of a small domestic-scale system (4 m diameter concentrator; <200 kg graphite) indicates that, in only 3 h, sufficient heat can be stored to supply 25 ％ more than is required for a typical 24 h electricity usage cycle, operating at a storage temperature of ≤420 ℃ in air.
solar-thermal energy conversion energy storage conductive heat transfer graphite thermal modelling
C.C. Sorrell T.C. Palmer L.J. Bowen A. Nakaruk
School of Materials Science and Engineering University of New South Wales Sydney, NSW 2052, Australia
国际会议
成都
英文
197-200
2009-09-25（万方平台首次上网日期，不代表论文的发表时间）