As renewables are our future, it is extremely important to establish safe and highly efficient storage. Buffering electrical energy as thermal energy is an economical and very efficient way. Kraftblock plays its advantages at the point. The exceptionally high energy density allows Kraftblock to store much more energy at a fraction of the space. Our energy storage has a practically infinite lifespan (tested for 15K cycles), while Lithium cells only provide a maximum of 6,000 cycles).
Kraftblock is produced with up to 85% recycled material which makes it eco-friendly and sustainable. It is universally applicable (Power-to-Heat, Heat-to-Heat, Heat-to-Power, Power-to-Power) and very cost-effective thanks to the modular system. As Kraftblock stores at a temperature profile up to 1,300°C the thermal energy can be “electrified” with great efficiency. The round-trip can even be optimized by using this storage-power-plant as a CHP (combined heat/power)-plant. Renewable energy at the beginning of this process, renewable electricity and heat at the end of this process.
Use cases in the electricity sector
In general thermal storages, used as capacity storages can solve several problems in the electricity sector:
- Storing renewables (Wind, PV, CSP) peak shaving, energy supply in the doldrums
- Storage-Power Plants (replacement of the firing chambers against heat storages) Decarbonisation of conventional power plants
- Power Plant optimization (replacing oil for black start, cold start) reduction of primary energy and CO2
- Power Plant optimization (using stored heat as a buffer for district or industrial heating and steam generation for power plant processes; reduction of primary energy and CO2)
- Operating small power plants on remote sites with „mobile“ industrial waste heat
- Optimization of biomass power plants (collecting and storing the heat in mobile containers, transport to remote locations)
Kraftblock can be integrated into existing power plants, such as coal-fired power plants to shift them from conventional firing towards renewables. The big advantage: existing infrastructure can be used, such as turbine, grid-access, and district-heating. In this case, the efficiency can reach nearly 85%.
The same principle might be used as smaller units to supply island-solutions or renewable sites with energy support during times without sufficient wind or sunlight.
Concentrated Solar Power
Concentrated Solar Power (CSP) plants use mirrors to concentrate solar power on a specific point. Fresnel-plants, parabolic plants or solar towers are emerging technologies in regions with high Direct Normal Irradiation (DNI). Currently, molten salts are used to absorb and store heat.
Especially solar towers can produce more than 1,000°C at the receivers. At the moment, new receiver technologies are tested and Kraftblock is the perfect match as storage.
Kraftblock’s granular material can store higher temperatures over a much longer period at a fraction of space. Moreover, the higher storage temperature allows a significantly more efficient transformation into electricity. The combination of new solar towers and Kraftblock makes CSP capable of bearing base loads.