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a. Estimate the flow rate, static pressure rise, and power required at 1200 rpm.

a. Estimate the flow rate, static pressure rise, and power required at 1200 rpm.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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3.37. A large centrifugal fan is designed to operate at 600 rpm, with an impeller diameter of 60 in. The fan uses 40 hp at 60,000 cfm and 3.0 in. wg static pressure rise. The fan is driven by a variablefrequency motor that can operate at any speed between 600 and 7200 rpm. a. Estimate the flow rate, static pressure rise, and power required at 1200 rpm. b. Estimate the change in efficiency at 1200 rpm compared to the value at 600 rpm. C At what speed (in rpm) would the scaled performance need to be corrected for compressibility effects? Part A only
Transcribed Image Text:3.37. A large centrifugal fan is designed to operate at 600 rpm, with an impeller diameter of 60 in. The fan uses 40 hp at 60,000 cfm and 3.0 in. wg static pressure rise. The fan is driven by a variablefrequency motor that can operate at any speed between 600 and 7200 rpm. a. Estimate the flow rate, static pressure rise, and power required at 1200 rpm. b. Estimate the change in efficiency at 1200 rpm compared to the value at 600 rpm. C At what speed (in rpm) would the scaled performance need to be corrected for compressibility effects? Part A only
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