Cubit Power Systems has developed a Latent Heat Storage System for utility scale Solar Thermal plants

Why Thermal Storage

  • Higher capacity factor/dispatchability means higher revenue
            Decouples solar irradiation from electricity generation
  • Lower Levelized Cost Of Electricity yeilds higher profit
            Spread capital and fixed costs over more production hours

Why Latent Heat Storage

  • Significantly lower capital costs
  • Less storage medium
  • Smaller footprint
  • Less infrastructure
  • Constant output temperatures at high flux
  • Better plant efficiency

Cubit's Patent Pending Technology Provides Base-load Power At Grid Parity Rates

FEATURES:

  • Single Tank System
  • Technology can use different phase change materials
  • Large range of operating temperatures (~140°C-500°C)
  • Test system currently operating at ~380 °C
  • Can generate steam or oil vapour
  • Closed loop continuous process
  • Distributed or centralized storage
  • Higher capital costs than having no storage but significantly lower Levelized Cost of Electricity (LCOE)

Cubit had to Solve Several Key Problems:

  • Heat transfer coefficient is dominated by the thermal conductivity of the solid phase change material
  • Insulation caused by a non conductive molten salt freezing on exchange surface when extracting heat
  • Transferring heat from the solar field into the solid PCM for storage at an acceptable rate
  • Little information on more than a few heat storage media currently in use
  • Heat capacity
  • Thermal Stability
  • Corrosion
  • Hygroscopy