TABLE OF CONTENTS Note that the CFCs have been omitted from these tables. The replacement refrigerants such as R134a are as yet largely untried in heat pipes.
| Fluids listed: (in order of appearance) | Helium | Heptane |
| Nitrogen | Water | |
| Ammonia | Flutec PP9 | |
| High-temperature organics | Pentane | |
| Mercury | Caesium | |
| Acetone | Potassium | |
| Methanol | Sodium | |
| Flutec PP2 | Lithium | |
| Ethanol | ||
| Properties listed: | Latent heat of evaporation | Vapour dynamic viscosity |
| Liquid density | Vapour pressure | |
| Vapour density | Vapour specific heat | |
| Liquid thermal conductivity | Liquid surface tension | |
| Liquid dynamic viscosity |
| Helium | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Temp C | Latent heat kJ/kg | Liquid density kg/m 3 | Vapour density kg/m 3 | Liquid thermal conductivity W/m C 10 -2 | Liquid viscos. cP 10 2 | Vapour viscos. cP 10 3 | Vapour press. Bar | Vapour specific heat kJ/kg C | Liquid surface tension N/m 10 3 |
| ?271 | 22.8 | 148.3 | 26.0 | 1.81 | 3.90 | 0.20 | 0.06 | 2.045 | 0.26 |
| ?270 | 23.6 | 140.7 | 17.0 | 2.24 | 3.70 | 0.30 | 0.32 | 2.699 | 0.19 |
| ?269 | 20.9 | 128.0 | 10.0 | 2.77 | 2.90 | 0.60 | 1.00 | 4.619 | 0.09 |
| ?268 | 4.0 | 113.8 | 8.5 | 3.50 | 1.34 | 0.90 | 2.29 | 6.642 | 0.01 |
| Nitrogen | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Temp C | Latent heat kJ/kg | Liquid density kg/m 3 | Vapour density kg/m 3 | Liquid thermal conductivity W/m C | Liquid viscos. cP 10 1 | Vapour viscos. cP 10 2 | Vapour press. Bar | Vapour specific heat kJ/kg C | Liquid surface tension N/m 10 2 |
| ?203 | 210.0 | 830.0 | 1.84 | 0.150 | 2.48 | 0.48 | 0.48 | 1.083 | 1.054 |
| ?200 | 205.5 | 818.0 | 3.81 | 0.146 | 1.94 | 0.51 | 0.74 | 1.082 | 0.985 |
