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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

EXPERIMENTAL INVESTIGATION OF OPEN LOOP TWO PHASE THERMOSYPHON IN NARROW VERTICAL CHANNEL

Get access (open in a dialog) DOI: 10.1615/IHTC13.p6.380
5 pages

摘要

In the present work, an experimental investigation is presented to evaluate the effectiveness of the boiling at the bottom of MTR fuel element of pool type reactors as a cooling mechanism to the uncovered zone, in a case of a partial Loss Of Coolant Accident (LOCA). The experiments were performed by using electrically heated test section. The dimensions of the channel cross section were 2 × 60 mm and 600 mm in high. The test section immersed in a water pool in a vertical direction and the level of the water was a half of the test channel high (300 mm). The test section walls were heated in a various channel power and the wall temperature was measured.
It was found that in a low power level of about 130 W the boiling in the immersed part of the channel is very poor causing a low heat transfer coefficient and a high wall temperature. When the channel power was higher (about 250 W) the boiling at the immersed zone was more intensive causing a slug flow at the exposed zone of the channel and the wall temperature reduced to the saturation temperature. The experiments carried out until a channel power of about 2.2 kW without reaching any critical wall temperature.