Motor calculation for various applications.
1. Pump motor.
Pump motors are calculated using the following equation.
where :
γ stands for the fluid specific weight in Ν/m3 (9810N/m3 for water and 8000 for petroleum).
Q stands for pump flow capacity in m3/h.
h is the discharge height in m
η is the motor - pump system total efficiency factor (0.50 ~ 0.70).
2. Lifts , elevators and cranes.
Motors for these applications are calculated using the following equation
where :
G is the maximum load to be lifted in kp (1kp = 9.81N).
v is the elevation velocity in m/s.
η is the motor - pulley system total efficiency factor (0.50 ~ 0.70).
When calculating person lifts G we must add 75kg (=kp) for each person.
If there is a contraweight we must divide the work load by 2.
For a 10 person lift with a contraweight , the load for the equation is
10 x 75kp = 750kp / 2 = 375kp
3. Fan - compressor motors.
Motors for these applications are calculated using the following equation
where :
Q is the air flow in m3/h.
Dp is pressure raise in bar =105 Pa (N/m2).
η is the motor - fan (or compressor) system total efficiency factor (0.50 ~ 0.70).
Εγώ είμαι υπέρ της πρώτης πρότασης. Το ίδιο σύστημα για δύο χρήσεις.
alto 22-04-2024, 23:30:38Καλησπέρα σε όλους. Θα ήθελα να μου πείτε την γνώμη σας για το εξής:
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