| Summary: | 碩士 === 國立中央大學 === 能源工程研究所 === 106 === The purpose of research is to discuss the effect of different fan
characteristics on fin heat transfer performance. Using high-pressure and
low-pressure fan to do experiment with plain fin, offset strip fin and
louver fin. From the result of heat transfer, on low-pressure fan
experiment, the louver fin and offset strip fin have a lower flow rate due
to pressure loss, and the effect of the lower flow rate is much larger than
the heat transfer enhancement effect to plain fin.Therefore, the
performance of the plain fin is better than offset strip fin and louver fin
under the low wind speed fan.
With high-pressure fan experiment, heat transfer enhancement fin
have a small difference in flow rate, so that the heat transfer enhancement
fins can exhibit better heat transfer performance than plain fin.
In addition, the fan and the fin need to be properly spaced, and the
spacing has less influence on the offset strip fin and louver fin. If the
high-pressure fan reduces its input power, its pressure loss is higher. In
this case, the plain fin performance is better than the heat transfer
enhancement fin。
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