Differential pressure heat transfer unit - has wick with resistance to liq. flow diminishing progressively from inlet to outlet

摘要

The unit comprises a closed tubular vessel with thermal energy inlet and outlet at opposite ends, between which extends a wick. A heat absorption agent is sealed inside the vessel, and travels by capillary action inside the wick from the outlet to the inlet end in the liquid state. There is a vapourised by the heat absorbed and transferred towards the outlet due to the pressure difference. It is liquefied by heat released at the outlet. The wick (2) is so constructed that the resistance offered by it to liquid circulation sinks progressively from the inlet to the outlet end. Multiple channels can be formed in the inside surface of the closed vessel (1), their width increasing progressively from inlet to outlet, and which may form the wick.