Clathrate hydrate cold storage for solar air conditioning


Solar cooling is an effective means of reducing electricity peak demand caused by building air conditioning, by directly harvesting solar energy for cooling. However, the yield of solar cooling systems is constraint to a certain extent by the intermittent nature of solar radiation. This disadvantage could be mitigated by introducing cold storage into the solar cooling system so that solar energy could be stored when supply exceeds demand, and utilized under opposite conditions. Clathrate hydrates could be an ideal candidate for the storage, with its large melting enthalpy and high phase change temperature in some species. The project aims at investigating phase equilibrium behaviour and thermal properties of clathrate for the use of cold storage, as well as the impact of cold storage on thermodynamic efficiency and output of the solar cooling system.


  1. M. Dennis, I. Doemland, and L. Hou. Status and Prospects of Solar Cooling in Australia. In Proceedings of the 49th Annual Conference of the Australian Solar Energy Society, Sydney, 30 November–2 December, 2011.

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  2. L. Hou and M. Dennis. Evaluation of HVAC cold storage using TRNSYS under Australian conditions. In Proceedings of INNOSTOCK2012—The 12th International Conference on Energy Storage, Lleida, Spain, 16–19 May, 2012.

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