Pumping System Design Process:
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Pumping system design involves calculating the total dynamic head (TDH) required to move fluid through a piping system at a specified flow rate. This determines the pump size and power requirements.
The workflow follows these steps:
Where:
Total Dynamic Head (TDH): The total equivalent height that the pump needs to overcome, including static lift and friction losses.
Reynolds Number: Determines flow regime (laminar or turbulent) which affects friction calculations.
Hydraulic Power: The theoretical power required to move the fluid, excluding pump inefficiencies.
Tips: Enter all required parameters in consistent units. For accurate results, ensure pipe diameter is actual internal diameter and viscosity values are correct for the operating temperature.
Q1: What's the difference between static head and dynamic head?
A: Static head is the vertical distance between fluid levels, while dynamic head includes friction losses in pipes and fittings.
Q2: How do I account for fittings and valves?
A: Use equivalent length method - convert each fitting to an equivalent length of straight pipe.
Q3: What if my flow is laminar (Re < 2000)?
A: The calculator automatically uses the correct friction factor calculation for laminar flow.
Q4: How do I select a pump based on these results?
A: Choose a pump whose performance curve meets your required flow rate at the calculated TDH, with some safety margin.
Q5: What about pump efficiency?
A: Actual pump power = Hydraulic power / Pump efficiency. Typical centrifugal pump efficiencies range 50-85%.