Molten alkali can be active as a thermal activity accumulator adjustment to absorb thermal activity calm by a solar belfry or solar canal so that it can be acclimated to accomplish electricity in bad acclimate or at night. It was approved in the Solar Two activity from 1995-1999. The arrangement is predicted to accept an anniversary ability of 99%, a advertence to the activity absent by autumn calefaction afore axis it into electricity, against converting calefaction anon into electricity.345 The aqueous alkali is a admixture of 60 percent sodium nitrate and 40 percent potassium nitrate, frequently alleged saltpeter. It is non-flammable and nontoxic, and has already been acclimated in the actinic and metals industries as a heat-transport fluid, so acquaintance with such systems exists in non-solar applications. The accession of added nitrates like Calcium nitrate reduces the melting point (133 ºC).
The alkali melts at 221 °C (430 °F). It is kept aqueous at 288 °C (550 °F) in an cloistral "cold" accumulator tank. The aqueous alkali is pumped through panels in a solar beneficiary area the focused sun heats it to 566 °C (1,051 °F). It is again beatific to a hot accumulator tank. This is so able-bodied cloistral that the thermal activity can be agreeably stored for up to a week.citation needed
When electricity is needed, the hot alkali is pumped to a accepted steam-generator to aftermath superheated beef for a turbine/generator as acclimated in any accepted coal, oil or nuclear ability plant. A 100-megawatt agent would charge a catchbasin of about 30 anxiety (9.1 m) alpine and 80 anxiety (24 m) in bore to drive it for four hours by this design.
Several emblematic canal ability plants in Spain6 and solar ability belfry developer SolarReserve use this thermal activity accumulator concept.
The alkali melts at 221 °C (430 °F). It is kept aqueous at 288 °C (550 °F) in an cloistral "cold" accumulator tank. The aqueous alkali is pumped through panels in a solar beneficiary area the focused sun heats it to 566 °C (1,051 °F). It is again beatific to a hot accumulator tank. This is so able-bodied cloistral that the thermal activity can be agreeably stored for up to a week.citation needed
When electricity is needed, the hot alkali is pumped to a accepted steam-generator to aftermath superheated beef for a turbine/generator as acclimated in any accepted coal, oil or nuclear ability plant. A 100-megawatt agent would charge a catchbasin of about 30 anxiety (9.1 m) alpine and 80 anxiety (24 m) in bore to drive it for four hours by this design.
Several emblematic canal ability plants in Spain6 and solar ability belfry developer SolarReserve use this thermal activity accumulator concept.
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