Gas-tolerant arterial heat pipe

Heat exchange – Intermediate fluent heat exchange material receiving and... – Liquid fluent heat exchange material

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165 32, 16510427, 122366, F28D 1500

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active

045208654

ABSTRACT:
A closed-loop arterial heat pipe comprises an evaporator domain (10) and a condenser domain (11) interconnected by a transition domain (12). An interior surface of the evaporator domain (10) defines an evaporation chamber, which has a helical channel (17) of capillary transverse dimension formed thereon. The transition domain (11) defines a conduit (13) through which vapor-phase working fluid is thermodynamically driven substantially adiabatically from the evaporator domain (10) to the condenser domain (11), and an artery (14) through which liquid-phase working fluid is returned from the condenser domain (11) to the evaporator domain (10) by capillary action. The artery (14) has a generally pyriform transverse cross-sectional configuration that converges to a throat portion adjacent a slot (16) of capillary transverse dimension on the surface of the evaporation chamber. Whenever a gas bubble in the liquid-phase working fluid flowing in the artery (14) interrupts capillary pumping of the liquid-phase working fluid through the slot (16) into the evaporation chamber, heat conducted through the evaporator domain (10) to the artery (14) produces an increase in temperature in the liquid-phase working fluid adjacent the bubble. This increase in temperature vaporizes the liquid-phase working fluid between the bubble and the slot (16), and also raises the pressure in the bubble to a value approaching without exceeding the pressure in the evaporation chamber. As further heat is conducted to the artery (14), capillary pumping of the liquid-phase working fluid between the bubble and the slot (16) is restored, and the liquid-phase working fluid passes through the converging throat portion of the artery (14), and then through the slot (16), into the helical channel (17) on the surface defining the evaporation chamber. The bubble is then vented into the evaporation chamber, and capillary pumping of the liquid-phase working fluid from the artery (14) into the evaporation chamber resumes.

REFERENCES:
patent: 3517730 (1970-06-01), Wyatt
patent: 3844342 (1974-10-01), Eninger et al.
patent: 4441548 (1984-04-01), Franklin et al.
patent: 4470451 (1984-09-01), Alario et al.

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