Hydraulic basic calculation formula
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1. Output (kg) = d square X pye X pressure (Kg per meter square) |
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D = Cylinder inner diameter (Cm) Pye = 3.14
* In case the pressure of cylinder (with diameter 100) being 100 Kg per meter square, the calculation becomes:
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10 X 10 X 3.14 X 100 = 7.850Kg. |
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2. Speed (Pump flow quantity)
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Flow quantity(Liters per minute) = D square X pye X speed (cm per min) divided by 10000 |
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* In case of cylinder diameter being 100 and 100 mm/sec
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10 X 10 X 3.14 X 10 X 60 divided by 10000 = 47.1 Liters per minute. |
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3. Selection of electrical machine
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Shaft input power (kw)= P X Q divided by Myu (efficiency) |
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612 |
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100 kg per meter square X 47.1 liter per min divided by 0.9 = 8.55 kw (electrical machine: 11 Kw) |
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612 |
4. Heat calculations Heat capacity= 1 kw = 860 Kcal/n (kcal/n)
8.55 X 860 = 7.353 Kcal/n
( It is the case where the pump flow quantity is released from full quantity relief value. 100 Kg per square meter ) |