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WHEN WOULD ONE SELECT AN INDUCED DRAFT OR A FORCED DRAFT FAN?

April 26, 2017draft fan forced induced select

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WHEN WOULD ONE SELECT AN INDUCED DRAFT OR A FORCED DRAFT FAN?

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Typically Induced Draft fan coolers have better distribution of air across the bundle. Because of the orientation there is less chance of recirculation of the hot outlet air back into the inlet side. Generally it has better process control characteristics because the outlet shroud covers more than 50% of the bundle face area. This also protects against UV deterioration and hail damage. On the other hand Induced draft fans will have higher horsepower requirements if the leaving air is very hot. Life of the fan and components is lessened due to operating in higher temperatures. Also with induced draft fans configurations the fan and drive is less accessible for maintenance. Note: Fin Fan® is a trade-name of the Hudson Products Corporation. Hudson is a majority owner of Smithco Engineering. The correct terminology for this product is air cooled heat exchangers. The terms fin fans and fin fan coolers are used here due to its common usage in petrochemical refineries.