Enhancement of two-phase thermosyphon for cooling high heat flux power devices

摘要

The purpose of this study is the enhancement of cooling of high heat flux power devices such as a thyristor by a thermosyphon system. The thermosyphon used boiling and condensation of inert dielectric fluorocarbon (FC-72). Boiling occurred from a multiple chimney heat transfer structure. A boiling chamber is connected to the condenser by a double tube, with the inner tube carrying the condensed liquid and the outer annulus carrying vapor. Using the experimental model of a thermosyphon, heat flux capacity was enhanced by increasing the flow tube height Ho, boiling chamber height H/sub h/, and condenser liquid level H/sub l/. High heat flux capacity was achieved with H/sub 0/<8 cm, H/sub h/<10 cm, and H/sub l/