In order to design pipelines in complex systems logically, the pressure loss through the pipeline should always be calculated. Ultimately, this should always be as low as possible in order to prevent efficiency losses and to be able to operate the system in general.
Notes:
- The flow velocity should be less than 20, so that noise and erosion are avoided
- Pipe roughness is 0.02 for new drawn steel pipes and 0.05 for new welded steel pipes; for older pipes, higher values (approx. 0.2) must be expected due to wear
- One standard cubic meter (nm3) describes the volume of hydrogen at 1bar and 20°C, if only one flow value in kg/h is available, this must first be divided by the density (0.089kg/m3).
- Attention: The volume flow under pressure (operating volume) differs from the volume flow in standard cubic meters due to the compressibility of hydrogen (see calculation results)
- The calculation of pressure drop through valves, bends and taps is accurate only up to nominal diameters of 60mm
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