Thermal Conductivity Test Method for Engine Coolants by Hot Wire Method by ASTM International

This lab-based test method employs a transient hot wire technique and related equipment to measure thermal conductivity, thermal diffusivity, and volumetric heat capacity of various engine coolants and related fluids, including aqueous and non-aqueous types.

• Method Overview: Measures thermal properties of engine coolants and related fluids using a transient hot wire technique
• Direct Measurement: The System accurately determines thermal conductivity and diffusivity without additional input
• Versatile Application: Suitable for both aqueous and non-aqueous coolants with thermal conductivity between 0.1 to 1.0 W/mK
• Compatibility: Excludes fluids that react with platinum
• Temperature Range: Applicable from 20 to 100C
• Sample Size: Requires approximately 40 mL of sample
• Pressurization: No external pressurization needed for fluids with vapor pressure 33.8 kPa (4.9 psia) at test temperature
• Pressurization (High Vapor Pressure): External pressurization required for fluids with vapor pressure >33.8 kPa (4.9 psia) at test temperature