Pressure Drop in a fire fighting network with loops

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SUMMARY

This discussion focuses on verifying the External Static Pressure of a pump in a pressurized fire fighting network with loops. The key concept highlighted is that pressure drop in such a system is influenced by flow conditions and elevation changes. When flow is present, the system behaves like a resistor network, where pressure variations are a combination of elevation and flow effects. Understanding these principles is crucial for effective hydraulic analysis in fire fighting systems.

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  • Basic understanding of hydraulic systems
  • Knowledge of pressure drop calculations
  • Familiarity with flow dynamics in looped networks
  • Experience with fire fighting system design principles
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tj00343
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Hello Everyone,

Can someone please explain to me how I would go about verifying the External Static Pressure of a pump that feeds a pressurized fire fighting network with loops in it. An image of the network is attached. I'm not being able to grasp the concept of pressure drop in a pressurized loop and to imagine the hydraulics involved.

Thank you for your response

c4423b92-e09e-4eda-8ef9-e06aebb844cf
 

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The key is flow. If there is no flow, the only variation in pressure will be the result of elevation changes.
If there is flow, then you basically have a resistor network. So the changes in pressure will be elevation plus the affects from flow.
 

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