Department of Chemical Sciences, NVPAS, Vallabh Vidyanagar 388120, Gujarat, India
Adv. Mater. Lett., 2013, Current Issue, 4 (4), pp 277-282
DOI: 10.5185/amlett.2012.9420
Publication Date (Web): Feb 17, 2013
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E-mail: vdishq@yahoo.co.in
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.
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