Standard Test Method for Thermal Conductivity, Thermal Diffusivity, and Volumetric Heat Capacity of Engine Coolants and Related Fluids by Transient Hot Wire Liquid Thermal Conductivity Method

Importancia y uso:

5.1 This test method covers the measurement of thermal properties for engine coolants (aqueous or non-aqueous) and related fluids.

5.2 With each single measurement, the thermal conductivity (λ) and thermal diffusivity (α) are measured directly, and volumetric heat capacity (VHC) is determined by the relationship:

5.3 The test method is transient and requires only a small amount of specimen and a short duration of time (0.8 s) to run a measurement. These attributes minimize heat convection in the liquid.

5.4 The brief application of current to the sensor wire adds very little heat to the test specimen and ten repetitive tests may be applied at 30 s intervals without causing any significant convection or temperature drift.

Subcomité:

D15.03

Referida por:

D5372-25, D8565-24, D8085-24, D8566-24

Volúmen:

15.05

Número ICS:

71.100.45 (Refrigerants and antifreezes)

Palabras clave:

anhydrous; aqueous engine coolants; heat transfer fluids; non-aqueous engine coolants; specific heat capacity; thermal conductivity; thermal diffusivity; volumetric heat capacity; waterless;