Fluids / Propylene glycol, 20 % by volume
Thermal conductivity of propylene glycol, 20 % by volume vs temperature
A 20 % by volume propylene glycol solution, freeze protection to about −7 °C — the corrosion floor: any leaner and the inhibitors are too dilute to trust.
Thermal conductivity in W/(m·K), from -5 to 100 °C. The chart and the table below are the same numbers; the table is the one you can copy.
| Density | 1,020.2 kg/m³ |
| Specific heat | 3.973 kJ/(kg·K) |
| Dynamic viscosity | 2.02 mPa·s |
| Temperature (°C) | Thermal conductivity (W/(m·K)) | Row |
|---|---|---|
| 0 | 0.456 | published |
| 10 | 0.47 | published |
| 20 | 0.483 | published |
| 30 | 0.494 | published |
| 40 | 0.505 | published |
| 50 | 0.514 | published |
| 60 | 0.521 | published |
| 70 | 0.528 | published |
| 80 | 0.533 | published |
| 90 | 0.537 | published |
| 100 | 0.54 | published |
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 -5 to 100 °C · interpolated between 22 published anchors (values held, not extrapolated, past the ends)