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You are here Voi siete qui    Home > Technology > Concentrating Solar Power > Molten salts
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Molten salts properties

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The Molten Salt eutectic mixture, 60% NANO₃-40% KNO₃. These salts are widely used as fertilizer, they are low cost and available in large quantities. Their temperature varies from 290 to 550 °C when the solar field is operating.

  • Sodium Nitrate (NaNO3): 60% w.
  • Potassium Nitrate (KNO3): 40% w.
  • Operative temperatures: 260-550°C;
  • Non flammable and non toxic fluid;
  • Low cost fluid; - Good heat transport properties:
    > High Coefficient of Heat Transfer;
    > High Heat Capacity;
    > High Density;
    > Low Operative Pressures.

Salts Physical Properties :
  • Freezing Temperature: 238°C;
  • Melting Temperature: 221°C;
  • Heat of Fusion: 161 kJ/kg;
  • Volume Change on Fusion: 4,6%.
 
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Video   Molten Salt flow and
solidification
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Video   Molten Salt leakage, solidification and mechanical removal on ground.
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