Fluids, lubricants & process materials · Molten salts
Solar salt nitrate heat-transfer medium
Solar salt nitrate heat-transfer medium is a process-fluid reference for thermal, hydraulic or lubrication screening. Concentration, additives, pressure, temperature and ageing must accompany properties.
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01
Overview
- Material class
- Fluids, lubricants & process materials
- Category
- Molten salts
- Family
- Nitrate molten salt
- Product forms
- Bulk liquid
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Identity / formulation | ~60 wt% NaNO3 + 40 wt% KNO3 | Purity and additive package may vary |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | ~1800–1900 liquid | kg/m³ | Representative generic grade; verify supplier, condition and test method |
| Dynamic or kinematic viscosity | Temperature dependent | See condition | Representative generic grade; verify supplier, condition and test method |
| Thermal conductivity | ~0.45–0.55 | W/m·K | Representative generic grade; verify supplier, condition and test method |
| Indicative operating range | ~290–565 | °C | Representative generic grade; verify supplier, condition and test method |
| Heat capacity | Temperature dependent | kJ/kg·K | Representative generic grade; verify supplier, condition and test method |
| Compatibility | Materials and concentration dependent | — | Representative generic grade; verify supplier, condition and test method |
Conditions
Representative clean fluid
Condition carried forward from the Phase 1 record.
03
Processing and use
Processing
- Viscosity, vapour pressure, oxidation, contamination and additive depletion must be evaluated at service temperature.
Applications
- Coolants and heat-transfer loops
- Hydraulic or lubrication systems
- Process equipment
Selection considerations
- A generic fluid-family record cannot replace a current supplier product datasheet or compatibility test.
04
Standards and related materials
Standards and designations
No standard designation is listed.
Other names
- Solar salt
05
Sources and context
Sources
- NREL — molten-salt concentrating solar power referenceGovernment reference
- U.S. Nuclear Regulatory Commission materials resourcesApplication reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Widely available, but additive packages and approvals are product specific.
Leak prevention, service life, reclaimability, toxicity and disposal route dominate environmental performance.
Strategic context
Critical to heat transfer, equipment reliability, energy efficiency and manufacturing stability.