Any salt can be used but a mix of sodium and potassium nitrate is best used commercially (otherwise used as a fertiliser)
.
.References : http://www.scientificamerican/article.cfm?id=how=to=use=solar=energy=at=night.
Any salt can be used but a mix of sodium and potassium nitrate is best used commercially (otherwise used as a fertiliser)
.
References :
http://www.scientificamerican/article.cfm?id=how=to=use=solar=energy=at=night.