Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 31340
Increase in Solar Thermal Energy Storage by using a Hybrid Energy Storage System

Authors: Hassan Zohoor, Zaeem M. Moosavi


The intermittent nature of solar energy and the energy requirements of buildings necessitate the storage of thermal energy. In this paper a hybrid system of storing solar energy has been analyzed. Adding a LHS medium to a commercial solar water heater, the required energy for heating a small room was obtained in addition to preparing hot water. In other words, the suggested hybrid storage system consists of two tanks: a water tank as a SHS medium; and a paraffin tank as a LHS medium. A computing program was used to find the optimized time schedule of charging the storage tanks during each day, according to the solar radiation conditions. The results show that the use of such system can improve the capability of energy gathering comparing to the individual water storage tank during the cold months of the year. Of course, because of the solar radiation angles and shorten daylight in December & January, the performance will be the same as the simple solar water heaters (in the northern hemisphere). But the extra energy stored in November, February, March & April, can be useful for heating a small room for 3 hours during the cold days.

Keywords: Hybrid, Optimization, Solar thermal energy, Storage.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1481


[1] Dincer, I., "On thermal energy storage systems and applications in buildings", Energy and Buildings, Volume 34, Issue 4, May 2002, Pages 377-388.
[2] Vosen, S.R., and Keller, J.O., "Hybrid energy storage systems for standalone electric power systems: optimization of system performance and cost through control strategies", International Journal of Hydrogen Energy, Volume 24, Issue 12, December 1999, Pages 1139-1156.
[3] Joudi, Kh.A., and Abdul-Ghafour, Q.J., "Development of design charts for solar cooling systems. Part I: computer simulation for a solar cooling system and development of solar cooling design charts", Energy Conversion and Management, Volume 44, Issue 2, January 2003, Pages 313-339.
[4] Badescu, V., and Staicovici, M.D., "Renewable energy for passive house heating - Model of the active solar heating system", Energy and Buildings, Volume 38, Issue 2, February 2006, Pages 129-141.
[5] Dharuman, C., Arakeri, J.H., and Srinivasan, K., "Performance evaluation of an integrated solar water heater as an option for building energy conservation", Energy and Buildings, Volume 38, Issue 3, March 2006, Pages 214-219.
[6] LeBreux, M., Lacroix, M., and Lachiver, G., "Fuzzy and feedforward control of an hybrid thermal energy storage system", Energy and Buildings, Volume 38, Issue 10, October 2006, Pages 1149-1155.
[7] Fraisse,, G., Johannes, K., Trillat-Berdal, V., and Achard, G., "The use of a heavy internal wall with a ventilated air gap to store solar energy and improve summer comfort in timber frame houses", Energy and Buildings, Volume 38, Issue 4, April 2006, Pages 293-302.
[8] Fang, X., and Zhang, Zh., "A novel montmorillonite-based composite phase change material and its applications in thermal storage building materials", Energy and Buildings, Volume 38, Issue 4, April 2006, Pages 377-380.
[9] Benmansour, A., Hamdan, M.A., and Bengeuddach, A., "Experimental and numerical investigation of solid particles thermal energy storage unit", Applied Thermal Engineering, Volume 26, Issues 5-6, April 2006, Pages 513-518.
[10] Shaikh, Sh., and Lafdi, Kh., "Effect of multiple phase change materials (PCMs) slab configurations on thermal energy storage", Energy Conversion and Management, Volume 47, Issues 15-16, September 2006, Pages 2103-2117.
[11] Nagai, H., and Segawa, H., "Energy-storable dye-sensitized solar cell with a polypyrrole electrode", Chem Commun (Camb), 2004 Apr 21, Pages 974-5.
[12] Parker, R., and Clapper, Jr.W.L., "HYDROGEN-BASED UTILITY ENERGY STORAGE", Proceedings of the DOE Hydrogen Program Review, NREL/CP-570-30535, 2001.
[13] Hammou, Z.A., and Lacroix, M., "A hybrid thermal energy storage system for managing simultaneously solar and electric energy", Energy Conversion and Management, Volume 47, Issue 3, February 2006, Pages 273-288.
[14] Zohoor, H., & Moosavi Z.M., "Efficiency Optimization in Solar Hybrid Energy Storage Systems", Proceeding of the 15th ISME 2008 Conference, Bhopal, India, March 2008, Pages 212-223.
[15] Incropra, F.P., and Dewitt, D.P., Introduction to Heat Transfer, Library of Congress Cataloging in Publication Data, 2nd Edition, 1990.
[16] Heisler, M.P., "Temperature Charts for Induction and Constant Temperature Heating", Trans. ASME, 69, 1947, Pages 227-236.
[17] Raithby, G.d., & Hollands K.G.T., "A General Method of Obtaining Approximate Solutions to Laminar and turbulent Free Convection Problems", Advances in Heat Transfer, Vol. 11, 1975, Pages 265-315.