Low-melting point inorganic nitrate salt heat transfer fluid
AssigneeSandia Corporation
InventorsRobert W. Bradshaw, Douglas A. Brosseau
Life of this patent
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Abstract
A low-melting point, heat transfer fluid made of a mixture of four inorganic nitrate salts: 9-18 wt % NaNO3, 40-52 wt % KNO3, 13-21 wt % LiNO3, and 20-27 wt % Ca(NO3)2. These compositions can have liquidus temperatures less than 100 C; thermal stability limits greater than 500 C; and viscosity in the range of 5-6 cP at 300 C; and 2-3 cP at 400 C.
Claims13
The composition comprising in Mol %, cation basis:
- 16 mol % NaNO3,
- 47 mol % KNO3,
- 25 mol % LiNO3, and
- 12 mol % Ca(NO3)2.
The composition comprising in Mol %, cation basis:
- 20 mol % NaNO3,
- 38 mol % KNO3,
- 30 mol % LiNO3, and
- 12 mol % Ca(NO3)2.
The composition comprising in Mol %, cation basis:
- 11 mol % NaNO3,
- 50 mol % KNO3,
- 27 mol % LiNO3, and
- 12 mol % Ca(NO3)2.
The composition consisting essentially of in Mol %, cation basis:
- 16 mol % NaNO3,
- 47 mol % KNO3,
- 27 mol % LiNO3, and
- 10 mol % Ca(NO3)2.
The composition consisting essentially of in Mol %, cation basis:
- 20 mol % NaNO3,
- 38 mol % KNO3,
- 30 mol % LiNO3, and
- 12 mol % Ca(NO3)2.
The composition consisting essentially of in Mol %, cation basis:
- 11 mol % NaNO3,
- 50 mol % KNO3,
- 27 mol % LiNO3, and
- 12 mol % Ca(NO3)2.
A composition, comprising in Mol %, cation basis:
- 14 mol % NaNO3,
- 49 mol % KNO3,
- 20 mol % LiNO3, and
- 17 mol % Ca(NO3)2.
Dependencies are inferred from the claim text.