A fan is to be selected to ventilate a bathroom whose dimensions are 2 m * 3 m * 3 m. The air velocity is not to exceed 8 m/s to minimize vibration and noise. The combined efficiency of the fan–motor unit to be used can be taken to be 50 percent. If the fan is to replace the entire volume of air in 10 min, determine (a) the wattage of the fan–motor unit to be purchased, (b) the diameter of the fan casing, and (c) the pressure difference across the fan. Take the air density to be 1.25 kg/m3 and disregard the effect of the kinetic energy correction factors.
A fan is to be selected to ventilate a bathroom whose dimensions are 2 m * 3 m * 3 m. The air velocity is not to exceed 8 m/s to minimize vibration and noise. The combined efficiency of the fan–motor unit to be used can be taken to be 50 percent. If the fan is to replace the entire volume of air in 10 min, determine (a) the wattage of the fan–motor unit to be purchased, (b) the diameter of the fan casing, and (c) the pressure difference across the fan. Take the air density to be 1.25 kg/m3 and disregard the effect of the kinetic energy correction factors.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A fan is to be selected to ventilate a bathroom whose
dimensions are 2 m * 3 m * 3 m. The air velocity is not to
exceed 8 m/s to minimize vibration and noise. The combined
efficiency of the fan–motor unit to be used can be taken to be
50 percent. If the fan is to replace the entire volume of air in 10
min, determine (a) the wattage of the fan–motor unit to be purchased,
(b) the diameter of the fan casing, and (c) the pressure
difference across the fan. Take the air density to be 1.25 kg/m3
and disregard the effect of the kinetic energy correction factors.
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