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not be useful for long term seasonal energy storage unless much larger volumes and extensive insulation were used. Also included on Figure 4 are the storage requirements for a year’s worth of space heating with wood with a conventional wood furnace. The adsorption TES is not only much smaller and ideally suited for long term thermal storage compared with other TES, but its storage size is comparable to a conventional wood burning stove for space heating. Conclusions and Recommendations Adsorption TES systems are feasible for long term thermal energy storage and space heating applications. The prototype has proven that thermal energy can be stored and released from the adsorbent. Models for storage efficiency and energy density as a function of regeneration temperature have been developed through experimentation and are applied to determine the parameters of an adsorption TES for real life space heating applications. Although the size required for the sufficient energy storage is large compared to natural gas or electric heating, it is comparable to heating with a wood furnace and it is renewable and sustainable. Adsorption TES is much more practical than other competing forms of thermal energy storage. These types of systems could be applied to any residential, commercial or retail building. Since this TES system could also be portable, it can be applied for use of waste heat in commercial manufacturing and refineries or large solar farms and then transported to building which do not have the space for on-site solar energy collection. Using this approach, thermal energy could be delivered similarly to propane for space heating. Future experiments for this project will focus on improving the energy density of the adsorption TES in order to reduce the size of the storage bed necessary as well as the feasibility of upgrading the energy obtained from the power spars to achieve a higher level of regeneration. Future work will also include performing an economic analysis of the complete system to verify if implementation of a solar panel with adsorption TES is feasible and if it can compete with current heating applications. Possible uses for the remaining excess thermal energy produced from the power spars, such as supplying domestic hot water needs or space heating for a second home, will also be investigated. Acknowledgements The authors wish to thank the industrial partners that have made this publication and research possible: Menova Energy Inc, Rio Tinto Alcan and Natural Resources Canada. References 1 Akgün, M., O. Aydin, K. Kaygusuz, Experimental study on melting/solidification characteristics of a paraffin as PCM, Energy Conversion and Management, Vol 48, p669-678, 2007. 2 Dicaire, D., Masters Thesis in Preparation, Department of Chemical and Biological Engineering, University of Ottawa, 2009 3 Hauer, A., Evaluation of adsorbent materials for heat pump and thermal energy storage applications in open systems, Adsorption, Vol 13, p399-405, 2007. 7PDF Image | Study of Adsorbent Energy Density and Regeneration for Long Term Thermal Energy Storage
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