THERMAL STABILITY CONTROL OF MICROENCAPSULATED SALT/GRAPHITE COMPOSITE FOR THERMAL STORAGE APPLICATION
The correlation between morphology and thermal storage capacity allowed analysis of thermal stability control characteristics of the novel microencapsulated NaNO3/ KNO3/graphite composite, designed for thermal storage in saturated and superheated steam commercial plants. Thermal stability control comprises DSC thermo-physical characterization and a structural stability study of the salt/graphite composites. The composite profits from the high thermal storage capacity of PCM and the good thermal conductivity of the graphite matrix. The composite phase transition ranges from 209 to 225℃ depending on different graphite type used and different manufacturing technique. The thermal storage capacity from 75kJ/kg to 85 kJ/kg is calculated with DSC software. The EDS elemental analysis of the NaNO3 /KNO3/graphite composite attributes to sodium-rich and potassium-rich areas and alternating areas of NaNO3-rich and KNO3-rich composition. While adhesive bonding and inter-phase composition determine thermal storage stability of the salt-graphite composite structure. Composite thermal storage behavior is well repeatable during DSC thermal cycling. But thermal stability of the composite in macro-enclosures depends on envelopes and conditions.
Mila Hadjieva Metodi Bozukov Tsenka Tsacheva
Central Laboratory of Solar Energy and New Energy Sources Bulgarian Academy of Sciences 72 Tzarigard Institute of Physical Chemistry Bulgarian Academy of Sciences Acad.G.Bonchev, bl.11 1113, Sofia, Bul
国际会议
2007世界太阳能大会(Proceedings of ISES Solar World Congress 2007)
北京
英文
2007-09-18（万方平台首次上网日期，不代表论文的发表时间）