Fluids / Ethylene glycol, 30 % by volume
Dynamic viscosity of ethylene glycol, 30 % by volume vs temperature
A 30 % by volume ethylene glycol solution, freeze protection to about −15 °C — lower viscosity than propylene at the same protection, and toxic.
Dynamic viscosity in mPa·s, from -10 to 100 °C. The chart and the table below are the same numbers; the table is the one you can copy.
| Density | 1,041 kg/m³ |
| Specific heat | 3.7 kJ/(kg·K) |
| Thermal conductivity | 0.464 W/(m·K) |
| Temperature (°C) | Dynamic viscosity (mPa·s) | Row |
|---|---|---|
| -10 | 6.5 | published |
| 0 | 4.5 | published |
| 10 | 3.2323 | interpolated |
| 20 | 2.4 | published |
| 30 | 1.8711 | interpolated |
| 40 | 1.5 | published |
| 50 | 1.2109 | interpolated |
| 60 | 1 | published |
| 70 | 0.85803 | interpolated |
| 80 | 0.75 | published |
| 90 | 0.65828 | interpolated |
| 100 | 0.58 | 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.
ASHRAE Handbook—Fundamentals, Ch. 31 (Secondary Coolants), interpolated from published tables · validated -10 to 100 °C · interpolated between 7 published anchors (values held, not extrapolated, past the ends)