碩士 / 國立成功大學 / 機械工程學系 / 86 / An experimental study was carried out to examine the effect of
waffle height, including three different values oh waffle
height: 1.18 mm, 1.32 mm and 1.58 mm, on the heat transfer and
friction characteristics of typical fin-and-tube heat exchanger
having wavy fins. A total of twenty seven samples of heat
exchangers, including twenty one of them having wavy fins and
the other four having plain fin configurations were tested.
During the experiments, the water inlet temperature was held at
65.0±0.3℃, Frontal The test results indicate that the effect
of waffle height on the heat transfer enchancement ratio,
compare to plain-fin counterpart, the heat transfer coefficient
and pressure drop are increased as the waffle height is
increased. In addition, as the frontal velocity is increased,
the effects of waffle height on heat transfer coefficient and
pressure drop are more significant. The enchancement of heat
transfer coefficient for the small waffle height Pd=1.18 mm
relative to the plain fin surface is negligibl
| Identifer | oai:union.ndltd.org:TW/086NCKU1489068 |
| Date | January 1998 |
| Creators | Chiou, Nien-fong, 邱能豐 |
| Contributors | Jiin-yuh,Jang, ：張錦裕 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 79 |
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