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THALER, S., HAUSER, R.
ENERGY STORAGE THROUGH THE USE OF PHASE CHANGE MATERIALS (PCM)
IMPLEMENTATION AND EVALUATION OF LATENT STORAGE TANKS FOR ECONOMICAL HEAT STORAGE
KOMUNALNA ENERGETIKA / POWER ENGINERING, 11
Due to fluctuating electricity networks (electricity generation from wind, photovoltaic...) it will be increasingly important in the future to perform network smoothing. This should be done on smart grids. Once electricity is not storable, it may be a good idea to produce heat at current excess and store it.
Currently, water is still considered as the most appropriate storage medium. Furthermore, there are also latent heat storage materials such as zeolite (only at high temperatures) or salt mixtures (e.g. sodium acetate) available. Also paraffin and other materials in which a phase change (liquid to solid) takes places are available. These stores have at present, however, the problem of heat conduction within the storage mass.
It is now scheduled to integrate suitable PCM-tanks into an existing heat pump system. The modified system should be able to store the excess energy and to recirculate it into the heating system. This should lead to an economically use of the heating pump and also to compensate the fluctuating power generation. As a significant parameter in this case the influence of the charging and discharging times is considered. The expected results should provide innovative heat storage methods to overcome these new challenge
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