SisTEA - High Efficiency Time-Shift of Energy

Our main product is a micro-CAES modular system, able to store time-indefinitely up to 7kWh of energy for each sub-module. The system is made up by innovative technologies perfectly mixed to achieve unparalleled efficiency and reliability.

The Common module is designed as a function of the required power, while the storage sub-modules can be added in parallel, depending on the desired storage capacity. SisTEA can store and release both thermal and electric energy depending on the user’s needs. The energy can be held theoretically for ever with no characteristic time of discharge or any kind of mechanical losses. Furthermore, the system is 100% green, since it doesn’t contain any chemical or hazardous substances.

Our Technologies:

The core unit of SisTEA is an intercooled compression of breathable air. The compression unit, realized with innovative technical ceramic, is engineered to easily and safely achieve high pressures and an optimal thermal exchange. The geometry is the result of an important fluid mechanics study, in order to get heavy duty and the best performances. The thermal energy is moved away from the main compressor and canalized into an innovative metallic hydrides subsystem located in a closed and pressurized circuit of hydrogen. Thanks to heat, hydrides are able to adsorb atoms of hydrogen, in a perfectly reversible way. During the discharge the stored mechanical energy is used to operate a three phase asynchronous generator, directly connected with the electrical grid. SisTEA is handled by a central embedded controller that can operate all the interconnected sub-modules to continuously search for the best Point Of Work and, thanks to self-learning time series data acquisition, to predict the user’s behaviour. A working SisTEA prototype is actually used as a cut-off filter for power peaks of a 90 kWp wind turbine located in south of Italy. The measured energy extraction from peaks, for every cycle of full charge is around 12 kWh, The resulting total efficiency is attested to be around 60%.