The performance data of Problem 10.57 are for a 36-in.diameter fan wheel. The fan also is manufactured with 42-, 48-, 54-, and 60-in.-diameter wheels. Pick a standard fan to deliver \(600 \mathrm{ft}^{3} / \mathrm{s}\) against a 1-in. water static pressure rise. Determine the required fan speed and input power required.

Data From Problem 10.57

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10.57 Performance data for a centrifugal fan of 3-ft diameter tested at 750 rpm are Volume flow 106 141 176 211 246 282 rate, Q (ft/s) Static pressure rise, Ap (psi) 0.075 0.073 0.064 0.050 0.033 0.016 2.75 3.18 3.50 3.51 3.50 3.22 Power output, P (hp) Plot the performance data versus volume flow rate. Calculate static efficiency, and show the curve on the plot. Find the best efficiency point, and specify the fan rating at this point.