TWO-PHASE FLOW VERTICAL ROD THERMOSIPHON FOR TRANSFERRING HEAT BY HEAT CONVECTION AND GRAVITY OF NANOFLUID CHARGED IN AN ENCLOSED THERMAL CONDUCTIVE METAL PIPE

摘要

PURPOSE: A two-phase flow vertical rod thermosiphon using nanofluid is provided to radiate or exchange heat of electronic appliances such as semiconductors or computers by injecting actuating fluid including metal nanoparticles to the enclosed pipe with the vacuum-sealed vertical rod structure. CONSTITUTION: Actuating fluid is charged in a thermal conductive metal pipe(3) with the vacuum-sealed vertical rod structure, and heat from a heat exchange material is transferred by convection and gravity of the actuating fluid. A two-phase vertical rod thermosiphon is composed of an evaporating unit(10) absorbing heat from the heat exchange material and transferring heat from the heat exchange material to the actuating fluid in the enclosed pipe, an insulation unit(20) transmitting gas generated in evaporating to the upper part of the enclosed pipe, and a condensing unit(30) radiating heat from the actuating fluid to the upper part of the enclosed pipe by condensing and liquefying gas and circulating the liquefied actuating fluid to the evaporating unit along the inner wall of the enclosed pipe by gravity and pressure difference of the actuating fluid. The actuating fluid is formed of nanofluid(1) including metal nanoparticles to increase the heat capacity of fluid and the heat transfer area.