| Working fluid | Air | Diethylether C4H10O | |
| Boiling point ˚C | −193 | 34.6 | |
| Density kg/m3 | L: Liquid | - | 713.8 |
| V: Vapor | 1.181 | 3.308 | |
| Heat of evaporation J/g | - | 392.1 | |
| Cv∙J/(g∙K) | 0.7171 | 2.33:L | |
| λ∙W/(m∙K) | 0.00257 | 0.129:L | |