IECM 14.0 beta User Manual > Modules Included with the IECM > Low-Carbon Hydrogen Production & Transport > SET PARAMETERS > Transport > Pipeline >

Pipeline

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The parameters on the Pipeline parameter screen define the physical characteristics and operating assumptions used to model hydrogen flow, pressure losses, and pipeline performance. The following parameters are available:

•Capacity Factor: This is the percentage of time the pipeline system is available for operation and hydrogen transport.

•Pipeline Diameter: This is the nominal pipe size (NPS) selected for the pipeline. It is used to determine the pipe dimensions and flow characteristics.

•Pipe Schedule: This is the pipe wall thickness designation corresponding to the selected NPS. It is calculated based on the pipe's internal diameter and pressure rating.

•Inlet Temperature: This is the hydrogen temperature at the pipeline inlet and is used in the hydraulic calculations.

•Slope: This is the average elevation change along the pipeline expressed as a percentage grade. It is used in the hydraulic calculations to account for elevation effects.

•Pipe Roughness: This is the internal surface roughness of the pipe and is used to calculate frictional pressure losses.

•Pipeline Length: This is the total length of the pipeline segment being analyzed.

•Erosional Velocity Limit: This is the maximum allowable hydrogen velocity based on the erosional velocity criterion. The software ensures by default that the operating velocity remains below 50% of the calculated erosional velocity to minimize the risk of pipe wall erosion and maintain safe operation. (See note below.)

•Allowable Pressure Drop: This is the maximum pressure loss permitted along the pipeline and is used to assess pipeline performance and compressor placement.

Note regarding Minimum Yield Strength (SMYS), Longitudinal Joint Factor, Temperature Derating Factor, and Erosional Velocity Limit:

Although these parameters can be varied individually in the software, doing so without consistently updating the associated specifications, design assumptions, or constraints could result in scenarios that are not physically or technically consistent.

For example, changing SMYS while keeping the other material assumptions unchanged would effectively represent a different pipe grade, not uncertainty in the properties of the same selected material.

For this reason, we do not recommend using any uncertainty on these parameters except for batch processing.