Description

Generate the system curve for fluid flowing through a pipeline, accounting for the geometric head, pipe length and internal diameter, wall roughness, minor losses, and water viscosity as a function of temperature.

 

The system curve depicts the relationship between flow rate and total head loss (the sum of distributed and localized head losses), enabling hydraulic system analysis and pump sizing.

 

The formula to calculate the total head loss (in meters of water column) is:

where:

• $h_g$ is the geometric head
• $h_f(Q)$ is the distributed head loss, calculated using the Darcy-Weisbach equation
• $k_{\text{minor}}$ is the total minor loss coefficient

Input Parameters

Parameter	Default Units	Description
Flows	-	Series of flow rate values to be analyzed
Geometric head	m	Height difference between the inlet and outlet
Pipe length	m	Total length of the pipeline
Inner diameter	mm	Internal diameter of the pipe
Roughness	mm	Roughness of the internal pipe wall
Roughness multiplier	-	Multiplicative factor applied to roughness
Total minor losses coefficient	-	Sum of localized loss coefficients
Temperature	°C	Water temperature, affecting viscosity

Output Parameters

Parameter	Default Units	Description
System curve	-	Series of total head loss values