Technology
Powered by a high-temperature heat pump and steam as a working fluid, the system stores thermal energy in molten salt, which is later reconverted into power and heat on demand.
Malta Addresses Key Challenges Decarbonizing Industry and Grid
Malta SEMS enables industrial and energy assets to decarbonize in the near term and provides a standout long-duration energy storage solution for renewable developments globally.
What Sets Malta SEMS Apart
Scalable (50-500+ MW/0.4-12+GWh)
Long-Duration (8-24 hours)
Flexible clean power and heat dispatch
Synchronous power generation for Grid reliability services
Seamless Integration with running assets
Waste heat utilization
No geological Dependencies
01 Inputs
- Renewable energy or energy from the grid charges the system.
- Integration with systems that produce excess heat and steam to drive the evaporation process and improve efficiency.
02 Charge cycle
- Heat pump (COP > 1.6) with multiple compression stages with intercooling, connected in series produces superheated steam to heat molten salt to 565ºC.
03 Storage
- The heat is stored in molten salt, and the cold is stored in water (from 8h. to multiday).
04 Generation Cycle
- Salt transfers heat to water to produce superheated steam.
- Superheated steam flows through a steam turbine to produce electricity or is extracted for heat / steam applications (up to 180bar 550ºC).
05 Outputs
- Adjustable combinations of power, steam and heat are supplied across applications.
- Flexible generation modules enable the ability to integrate with other power / heat / steam generation assets.
Built with non-hazardous, field-proven components that are fully recyclable and reclaimable
Molten Salt (Solar Salt)
The salts used by Malta SEMS store heat efficiently and are stable, nonflammable, nonexplosive, and nontoxic—making them a safe and effective thermal energy storage medium.
Water
Uses water and steam as the working fluid and low-temperature storage medium, with a closed-loop design that ensures minimal water consumption.
How Malta SEMS Supports the Grid
The table below summarizes the grid stability and ancillary services that can be provided by Malta SEMS. The technical characteristics of Malta SEMS is comparable to combined cycle and steam turbine capabilities for these services.
Service
- Physical Inertia / Synchronous Inertia
- Primary Frequency Control - Frequency containment reserve (FCR)
- Secondary Reserve – Automatic frequency estoration reserve (aFRR)
- Tertiary Reserve -manual frequency restoration reserve (mFRR)
- Voltage Control and Reactive Power support
- Black Start support
- Short circuit support
Outperforms Competition in Integrated Power and Heat Applications
Downloadable Datasheet
