Thermal Energy Storage

This breakthrough Power-to-Heat (P2H) technology enables industries and power systems to transition from fossil-fuels to carbon-free, high-temperature thermal energy, solving two of the biggest challenges facing clean energy adoption: the intermittency of renewables and dependency on volatile fuel prices.   

How it Works 

At the heart of MGTES lies a simple yet robust principle: storing energy in sand. During the charging phase, surplus renewable electricity or low-cost grid power heats a bed of silica sand to over 1,000 °C. 
Once charged, the system switches to storage mode. The sand settles, locking in thermal energy with minimal losses, for hours, days, or even weeks. 
When energy is needed, MGTES seamlessly discharges, transferring the stored heat to a fluid such as superheated steam at up to 600 °C. This high-grade thermal energy can be used directly in industrial processes or converted into electricity, ensuring dispatchability well beyond daylight hours. 

Inspired by Nature:
Silica sand as storage medium

Compared to conventional TES media (e.g. molten salts, ceramic bricks, concrete, and rocks), silica sand offers several key advantages.

• Higher Operating Temperature & Thermal stability
  Silica sand enables significantly higher operating temperatures (exceeding 1000°C), improving the thermodynamic efficiency of power cycles. Although molten salts have a higher specific heat capacity, their lower thermal stability limits their application.
• Cost Efficiency
  Extremely low cost and wide availability make it ideal for scalable solutions. 
• High Heat Retention
  With proper insulation, sand is effective for long-duration energy storage.
• Safety & Low Environmental Risk
  Sand is chemically inert and non-flammable. It also eliminates the need for corrosion-resistant materials and active heating systems to prevent solidification. Additionally, it is non-toxic and does not require special containment or cleanup procedures.
• Lower Maintenance Requirements
  No risk of freezing or clogging, which is a concern with molten salts at lower temperatures.
• Simplified, Scalable System Design
  No need for complex infrastructure; only fluidized bed. This simplicity translates to lower capital and operational costs.

Fluidization as key enabler

When using granular materials like silica sand as a heat transfer fluid (HTF) material in TES systems, fluidization offers several important technical benefits:

• Enhanced Heat Transfer
  Fluidized bed provides excellent heat transfer between the solid particles and the fluidizing gas. 
• Uniform Temperature Distribution
  Heat is more uniformly distributed throughout the storage medium, reducing thermal gradients. Also, continuous mixing of particles ensures homogeneous temperature profiles, preventing hot or cold spots that could reduce system efficiency.
• Rapid Thermal Response
  Due to increased surface area and contact efficiency, fluidized system can charge and discharge heat quickly, improving responsiveness.
• High Heat Exchange Efficiency & fast response times
  Fluidized bed allows direct contact between heat transfer surfaces and the particles, enabling efficient energy input/output.
• Scalability and Flexibility 
  The design is easily scalable for different storage capacities and power levels.
• Prevention of Sintering
  Continuous particle motion prevents agglomeration and reduces the risk of sintering, even at high temperatures.
• Mechanical Simplicity
  Requires no moving mechanical parts for mixing, which reduces maintenance compared to rotating systems.

Modularity

MGTES is designed as a modular system, enabling flexible deployment tailored to specific thermal energy demands. By selecting the mass of solid particles contained in each module, the thermal storage capacity of a single module can be configured over a wide range, starting from 5 MWh to +100 MWh.
MGTES’s modular approach offers a future-proof thermal storage solution that grows with your decarbonization goals.

• Scalable Design
  Easily increase storage capacity by adding new modules as energy needs grow or production lines expand
• Custom Integration
  Adapt system configuration to different industries, space constraints, or temperature requirements.
• Staged Investment
  Start small, then scale over time - minimizing upfront capital investment while maximizing long-term value.
• Operational Redundancy 
  Modular units can operate independently, ensuring system resilience and reducing downtime during maintenance.
• Faster Deployment
  Standardized modules simplify engineering, manufacturing, and installation, accelerating time-to-operation.

A New Standard for Industrial Heat 

Industrial heat is the backbone of modern production, yet it is also one of the hardest sectors to decarbonize. Today, most energy-intensive processes - from chemicals and food to textiles and mining - rely on fossil fuels to deliver the high temperatures they require.

MGTES changes that equation. 

By providing carbon-free heat on demand, it allows industries to replace gas boilers or CHP plants with a clean, reliable alternative. This shift brings multiple advantages.
Because MGTES can be charged when electricity prices are low and discharged during peak demand, it lowers the average cost of industrial heat while reducing exposure to volatile gas markets. It also improves energy security, cutting dependence on imported fuels.
Thanks to its modular design, the system can be scaled to fit both small and large industrial sites, delivering the flexibility that production lines demand.