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Parallel Pumps Principle:
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Total Dynamic Head (TDH) is the total equivalent height that a fluid is to be pumped, accounting for friction losses in the system. When pumps are arranged in parallel, the TDH remains the same as for a single pump while the flow rate increases.
The calculator uses the principle of pumps in parallel:
Where:
Explanation: In parallel pump configurations, each pump operates against the same head (TDH) as a single pump would, while the total flow rate is the sum of individual pump flows.
Details: Accurate TDH calculation is crucial for proper pump selection and system design. It ensures the pump can overcome the system's static head and friction losses.
Tips: Enter the Total Dynamic Head for a single pump in meters. The value must be greater than 0.
Q1: Why does TDH remain the same in parallel configuration?
A: Each pump in parallel works against the same system pressure (head), so the TDH doesn't change. The flow rates add up while the head remains constant.
Q2: What's the difference between series and parallel pump configurations?
A: In series, pumps add to the total head at the same flow rate. In parallel, pumps add to the flow rate at the same head.
Q3: When should I use pumps in parallel?
A: Parallel configurations are used when you need to increase flow rate while maintaining the same pressure (head) as a single pump.
Q4: Are there limitations to parallel pump arrangements?
A: Yes, pumps must have similar performance curves to work efficiently in parallel. Mismatched pumps can lead to one pump doing most of the work.
Q5: Does the number of pumps affect the TDH in parallel?
A: No, the TDH remains the same regardless of how many pumps are in parallel (though more pumps will increase the total flow rate).