| During step 2, the thermosiphon starts to operate and defrosts the air evaporator. |
| Cooling is achieved by a patented, non-cycling free-piston Stirling engine coupled to an isothermal thermosiphon which operates without moving parts. |
| A good thermosiphon has very little hydraulic resistance so that liquid can flow easily under the relatively low pressure produced by natural convection. |
| While any suitable liquid can be used, water is the easiest liquid to use in thermosiphon systems. |
| This article presents a heat pump for simultaneous heating and cooling in which a thermosiphon forms to defrost the air evaporator. |
| They depended on forward movement of the car and fans to move enough air through the radiator to provide the temperature differential that caused the thermosiphon circulation. |
