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HCEMS-11 Molten Salts

  The main feature of HCEMS-11 is the use of a spectrally selective coating (manufactured under ENEA license) having a composition optimized for typical operating temperature range of molten salts mixture (binary mixture of NaNO3 and KNO3 molten salts), from 290 °C up to 550 °C. In order to optimize both the thermo-mechanical and corrosion behavior, the thickness of steel tube has been chosen equal to 3 mm in accordance with operating conditions typical in a commercial Concentrated Solar Power (CSP) molten salt plant and according to international standards about pressure piping.

The HCEMS-11 uses pill getter into vacuum annulus. This getter allows a safe and efficient operation for the whole expected receiver life absorbing the residual gases desorbed by the metal and glass surfaces, inside the annulus. Actually HCEMS-11 is the sole commercially available receiver tube for high temperature application in thermodynamic solar plant (up to 550 °C, using a molten salts mixture like thermo-vector fluid), because allows indirect superheated steam generation to high pressure and temperature levels as it is in case of conventional thermoelectric power plant (superheated Rankine thermodynamic cycle) fed by fossil fuel.
 

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