Compact Seasonal Heat Storage
Omschrijving
Solar energy is abundantly available in summer and has a huge potential to reduce fossil fuel use. However, for residential buildings a large portion of the energy is used is for heating and domestic hot water purposes, with its highest demand in winter. In order to cope with this intermittency between supply and demand of heat, a loss-free storage solution is necessary. TNO is developing a loss-free heat battery together with European partners in the European MERITS project, which is coordinated by TNO. During the 4 year research program a large scale heat battery prototype has been developed, which proves the technical feasibility of the technology.
Daily heat storage can be arranged by mature boiler technology, but seasonal storage for at least half a year will require considerably lower heat losses. Moreover, seasonal heat storage will usually imply storing very large amounts of heat, so that heat storage should be compact, with high storage density. Energy storage by using solar heat (e.g. at 60-140°C) for reversible chemical reactions is an attractive solution, as the reaction products can be stored virtually loss-free. This principle is called thermo-chemical storage. One example of a reaction suited to the given range of operating temperatures is the hydration and dehydration of a salt. The reaction heat storage density is very high compared to sensible heat storage in water. The reaction storage density sets an upper limit to the storage density of any thermochemical storage (TCS) system, which requires besides the thermochemical material (TCM) also additional components, such as tubing, vessel, heat exchangers (HXs), and so on.
During this presentation, I will explain the relevance of heat storage in the context of the European ambitions towards a sustainable build environment, the technical and commercial Key Performance Indicators (KPI’s) of thermal energy storage, the state of the art of (thermal) energy storage technologies, the Unique Selling Points (USP’s) of thermo-chemical energy storage, the achievments that where obtained in the MERITS project, e.g. selecting a suitable thermo-chemical storage material, designing the heat battery, building a field test demonstrator and test results showing the feasibility of thermo-chemical storage, Business case of thermal energy storage, including household benefits under various economic scenario’s, other economic, social, technological and political drivers for implementation of thermal energy storage, and finally possible improvements for higher compactness and lower cost of thermal batteries and other novel thermal storage technologies.
Moreover a short movie (4 min) will be shown explaining the basic principle of thermo-chemical heat storage and the MERITS project.
For more info, please see: www.merits.eu and www.createproject.eu
De borrel begint om 18:00 uur en de maaltijd volgt stipt om 19:00 uur.
Aanmelden uiterlijk 10 september 2017 vóór 12.00 uur.
Spreker(s)
Christophe Hoegaerts (TNO)
Locatie
Stationsplein 45,3013 AK Rotterdam
Organisator
Kring Rotterdam