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Thermal conductivity of propylene glycol, 40 % by volume vs temperature

A 40 % by volume propylene glycol solution, freeze protection to about −21 °C — the middle charge — full winter protection at a manageable pumping penalty.

Thermal conductivity in W/(m·K), from -20 to 100 °C. The chart and the table below are the same numbers; the table is the one you can copy.

Thermal conductivity W/(m·K)
Thermal conductivity of propylene glycol, 40 % by volume in W/(m·K), from -20 to 100 °C-20 °C — 0.346 W/(m·K)-15 °C — 0.351 W/(m·K)-10 °C — 0.356 W/(m·K)-5 °C — 0.361 W/(m·K)0 °C — 0.366 W/(m·K)5 °C — 0.371 W/(m·K)10 °C — 0.376 W/(m·K)15 °C — 0.38 W/(m·K)20 °C — 0.384 W/(m·K)25 °C — 0.388 W/(m·K)30 °C — 0.392 W/(m·K)35 °C — 0.396 W/(m·K)40 °C — 0.399 W/(m·K)45 °C — 0.402 W/(m·K)50 °C — 0.405 W/(m·K)55 °C — 0.408 W/(m·K)60 °C — 0.41 W/(m·K)65 °C — 0.413 W/(m·K)70 °C — 0.415 W/(m·K)75 °C — 0.416 W/(m·K)80 °C — 0.418 W/(m·K)85 °C — 0.419 W/(m·K)90 °C — 0.42 W/(m·K)95 °C — 0.421 W/(m·K)100 °C — 0.422 W/(m·K)0.350.360.370.380.390.40.410.42-20-100102030405060708090100Temperature (°C)Thermal conductivity (W/(m·K))
Propylene glycol, 40 % by volume — everything else at 20 °C (default)
Density1,037.4 kg/m³
Specific heat3.702 kJ/(kg·K)
Dynamic viscosity4.59 mPa·s
Thermal conductivity by temperature
Temperature (°C)Thermal conductivity (W/(m·K))Row
-200.346published
-100.356published
00.366published
100.376published
200.384published
300.392published
400.399published
500.405published
600.41published
700.415published
800.418published
900.42published
1000.422published

Rows marked published land exactly on a source anchor and are the tabulated figure. The rest are this library’s interpolation between the two anchors either side — good enough to design with, and said out loud so you can decide that for yourself.

Dow, Engineering and Operating Guide for DOWFROST and DOWFROST HD, SI tables, by volume; typical values for inhibited product · validated -20 to 100 °C · interpolated between 25 published anchors (values held, not extrapolated, past the ends)

← Propylene glycol, 40 % by volume: every property at one temperature

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