Mathcad - 01-02

Mathcad - 01-02 - Problem 1-2 A large fan requires 300 lb...

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Unformatted text preview: Problem 1-2 A large fan requires 300 lb ft of torque at 1750 rpm Given: T := 300⋅ lb ⋅ ft n r := 1750 Solution: a. From equation 1-14: HP⋅ 5252⋅ T= solving for horsepower: lb ⋅ ft hp nr T⋅ n r HP := 5252⋅ lb ⋅ ft hp HP = 99.96 hp So essentially a 100 hp motor is required b. converting to watts: Pout = HP⋅ 0.7457⋅ kW Pout := 99.96⋅ hp ⋅ 0.7457⋅ Pout = 74.54 kW Pin := Pout η Pin = 82.82 kW η := 0.9 hp kW hp ...
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