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Heat Pipe Science and Technology, An International Journal

Publicado 4 números por año

ISSN Imprimir: 2151-7975

ISSN En Línea: 2151-7991

PHENOMENA INSIDE OSCILLATING HEAT PIPE WIRE FIN UNDER NATURAL CONVECTION

Volumen 3, Edición 1, 2012, pp. 23-34
DOI: 10.1615/HeatPipeScieTech.2012004368
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SINOPSIS

The visualisation of physical phenomena inside the closed-loop oscillating heat pipe (CLOHP) when using as a wire fin for a wire-on-tube heat exchanger operating under natural convection was investigated in this work. The tested CLOHP was a capillary tube made of glass tube having internal diameters of 1 and 2 mm. The glass capillary tube was attached to the copper tube panel. The tube pitch of the tube panel was varied between 30, 40 and 50 mm. R123, acetone and methanol were used as working fluids with a 50% filling ratio. The tube panel was placed in both horizontal and vertical orientations. It was found that R-123 can be boiled more easily than acetone and methanol because of its low boiling point. Moreover, it was found that the Bond number plays an important role in controlling the flow of bubbles inside the capillary tube.

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