Ionic liquid; thermal energy storage; phase change materials; solar cooker. Ionic liquid; thermal energy storage; phase change materials; solar cooker.
Department of Chemical Sciences, NVPAS, Vallabh Vidyanagar 388120, Gujarat, India
Adv. Mater. Lett., 2013, Current Issue, 4 (4), pp 277-282
Publication Date (Web): Feb 17, 2013
Copyright © IAAM-VBRI Press
Seven ionic liquids (ILs) based on tetrabutylammonium cation [N+4444] and inorganic anions were tested for their applications in a solar cooker. Thermophysical characteristics like melting point, density, heat of fusion, heat of solid - solid transitions, specific heat capacity and thermal conductivity were used to determine the efficiency of ILs used as phase change materials (PCMs) in solar thermal applications. A delay time of two hours was observed on an average in achieving the highest temperatures. A majority of the ILs extended the time required for achieving ambient temperature to a tune of around four hours. The ILs containing bromide, iodate and nitrate proved to be more efficient than the thiocyanate, bromate and hexafluorophosphate moieties.
Ionic liquid, thermal energy storage, phase change materials, solar cooker.