Flow Source

Overview

The Flow Source is the starting point for pressure and flow within the system. It defines the initial conditions for Residual, Static, and Peak Flow Rate, providing a foundation for downstream calculations. 

The values at the Flow Source are typically based on Pressure and Flow Tests at the main connection or an existing system tie-in. 

If precise values are unavailable, placeholders can be used and updated later.

Residual Pressure

Residual Pressure at the flow source is the starting pressure used to calculate residual pressure throughout the system. 

Factors Influencing Residual Pressure:

  • Input Values: The Residual Pressure input at the Flow Source serves as the starting point for all Downstream Residual Pressure Calculations.

Troubleshooting Residual Pressure:

  • Verify the Input Residual Pressure matches expected conditions.

  • Verify the Height input at the flow course input correlates to the building Level Heights.

Static Pressure

Static Pressure at the Flow Source is based solely on the fluid’s elevation and is used to determine static pressure conditions throughout the system. It establishes the reference point for elevation-related pressure changes.

Factors Influencing Static Pressure:

  • Input Values: The Static Pressure at the Flow Source serves as the benchmark for all downstream calculations.

Troubleshooting static pressure:

Step-by-step

  1. Confirm the Input Static Pressure matches expected conditions.

  2. Verify the Height input at the Flow Source input correlates to the building Level Heights.

Peak Flow Rate

Enter the maximum flow rate the system should handle under design conditions in the Peak Flow Rate field. This value represents the highest flow rate anticipated.

For troubleshooting peak flow rate calculations, see the Pipes/Ducts Peak Flow Rate Results section.