It has been estimated that an air flow rate of 5500 L/s is required to maintain...
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It has been estimated that an air flow rate of 5500 L/s is required to maintain the indoor air quality of an office space. After installation, a steadily running centrifugal fan (shown in the diagram) is found to provide pressure rise = 550 Pa, air flow rate = 6000 L/s, and operates with fan efficiency = 54%. The rotational speed of the fan shaft is 1040 rpm. Note that the efficiency of the belt-drive is well above 90% when properly installed/maintained Part a): What is the minimum size [hp] possible for the installed motor? Part b): Electrical power input to the motor is 8.3 kW. Assuming a constant 95% belt-drive efficiency, what is the rate of heat dissipation [kW] by the motor? Sélectionnez 2 réponse(s) correcte(s) For Part a), 10 hp For Part a), 7.5 hp For Part a), 5.0 hp For Part a), 2.0 hp For Part a), 1.0 hp For Part b), 1.1 kW For Part b), 1.5 kW For Part b), 1.8 kW For Part b), 3.6 kW For Part b), 3.8 kW It has been estimated that an air flow rate of 5500 L/s is required to maintain the indoor air quality of an office space. After installation, a steadily running centrifugal fan (shown in the diagram) is found to provide pressure rise = 550 Pa, air flow rate = 6000 L/s, and operates with fan efficiency = 54%. The rotational speed of the fan shaft is 1040 rpm. Note that the efficiency of the belt-drive is well above 90% when properly installed/maintained Part a): What is the minimum size [hp] possible for the installed motor? Part b): Electrical power input to the motor is 8.3 kW. Assuming a constant 95% belt-drive efficiency, what is the rate of heat dissipation [kW] by the motor? Sélectionnez 2 réponse(s) correcte(s) For Part a), 10 hp For Part a), 7.5 hp For Part a), 5.0 hp For Part a), 2.0 hp For Part a), 1.0 hp For Part b), 1.1 kW For Part b), 1.5 kW For Part b), 1.8 kW For Part b), 3.6 kW For Part b), 3.8 kW
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We must apply the formulas guiding motor power and fan performance in order to remedy this issue Let... View the full answer
Related Book For
Fundamentals of Thermodynamics
ISBN: 978-0471152323
6th edition
Authors: Richard E. Sonntag, Claus Borgnakke, Gordon J. Van Wylen
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