{"title":"Increase in Solar Thermal Energy Storage by using a Hybrid Energy Storage System","authors":"Hassan Zohoor, Zaeem M. Moosavi","volume":19,"journal":"International Journal of Physical and Mathematical Sciences","pagesStart":403,"pagesEnd":409,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/2796","abstract":"The intermittent nature of solar energy and the energy\nrequirements of buildings necessitate the storage of thermal energy.\nIn this paper a hybrid system of storing solar energy has been\nanalyzed. Adding a LHS medium to a commercial solar water heater,\nthe required energy for heating a small room was obtained in\naddition to preparing hot water. In other words, the suggested hybrid\nstorage system consists of two tanks: a water tank as a SHS medium;\nand a paraffin tank as a LHS medium. A computing program was\nused to find the optimized time schedule of charging the storage\ntanks during each day, according to the solar radiation conditions.\nThe results show that the use of such system can improve the\ncapability of energy gathering comparing to the individual water\nstorage tank during the cold months of the year. Of course, because\nof the solar radiation angles and shorten daylight in December &\nJanuary, the performance will be the same as the simple solar water\nheaters (in the northern hemisphere). But the extra energy stored in\nNovember, February, March & April, can be useful for heating a\nsmall room for 3 hours during the cold days.","references":"[1] Dincer, I., \"On thermal energy storage systems and applications in\nbuildings\", Energy and Buildings, Volume 34, Issue 4, May 2002, Pages\n377-388.\n[2] Vosen, S.R., and Keller, J.O., \"Hybrid energy storage systems for standalone\nelectric power systems: optimization of system performance and\ncost through control strategies\", International Journal of Hydrogen\nEnergy, Volume 24, Issue 12, December 1999, Pages 1139-1156.\n[3] Joudi, Kh.A., and Abdul-Ghafour, Q.J., \"Development of design charts\nfor solar cooling systems. 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