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Pressure-temperature-composition relationships for heated drawsalt systems

Authors
Journal
Solar Energy Materials
0165-1633
Publisher
Elsevier
Publication Date
Volume
5
Issue
1
Identifiers
DOI: 10.1016/0165-1633(81)90059-9
Disciplines
  • Astronomy

Abstract

Abstract A molten nitrate salt mixture consisting of 60% NaNO 3 and 40% KNO 3 by weight is an attractive candidate for a heat transfer and thermal energy storage fluid in large-power solar systems. The relationships between pressure, temperature and composition (nitrate to nitrite ratio) have been determined for this salt mixture under two system configurations: constant volume (sealed containment) and constant pressure (open containment). For the first, families of pressure-temperature and composition-temperature curves were generated for initial salt volume fractions of 0.1 to 0.7. For the constant pressure system, composition-temperature curves were generated for oxygen pressures of 1, 0.2, 0.01 and 0.001 atm.

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