MH4HeatStorage – Metal hydride technologies for non-dissipitative seasonal heat storage

The seasonal and non-dissipative storage of heat holds an enormous energy savings potential when it comes to the heating of rooms and the provision of warm water. Reversible metal hydrides are a very useful class of compounds that could potentially offer ways to seasonally store heat in a non-dissipative way (use of the heat produced in reversible chemical reactions). This project aims to identify possible technological interfaces between building technology and metal hydride research. In detail, the project looks at the model case ‘single family home’ in combination with various concepts for seasonal metal hydride heat storage.

In 2012 about 30% of energy consumption could be attributed to heating and warm water provision in Austria (BMWFW, 2017). Seasonal, non-dissipative heat storage could accordingly unlock an important energy savings potential.

For long-term heat storage the use of reaction enthalpy caused by reversible chemical reactions could take on an important role. Practical reversibility and large reaction enthalpy oppose each other. Thus, the number of reversible chemical reactions is low. Metal hydrides present a good compromise in this context when applied to seasonal, non-dissipative heat storage. However, research concerning heat storage in metal hydrides is still in its infancy. The project in hand looks at the possibility for using metal hydrides as heat storage for homes. To this end, the ideal heat storage demand in relation to the collectors’ yield and thus the collectors’ ideal temperature shall be defined. Based on these data, researchers evaluate the pros and cons of various metal hydride collectors as seasonal heat storage. The project’s result is expected to define the feasibility of a seasonal metal hydride heat collector for a single-family home according to modern building standards.

Duration: 10/2015 – 03/2017  

Source: BMWFW (2017): Energiestatus Österreich 2014 - Entwicklung bis 2012; Bundesministerium für Wissenschaft, Forschung und Wirtschaft - Sektion IV; called on 2017/08/02 -

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Funding agency

This project is funded by the climate and energy fund within the funding program „Energieforschung (e!MISSION)“.


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