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Modify pressure profile and/or pipe types
The Hysopt software supports 3 methods for pipe sizing:
- Maximum velocity
- Maximum pressure drop per square meter
- Target pressure drop per square meter
Both velocity and pressure loss serve as 'hard' filtering criteria. A pipe diameter is NEVER selected when the pressure loss is larger than the maximum, or the velocity is larger than the maximum velocity. When target pressure losses are supplied, the pipe diameter is selected from the set of diameters that are allowed (by the above criteria), and which has the smallest deviation from the target pressure loss. Summarized this means: when both are supplied the most restrictive is applied and a "0" value is ignored.
In default, Hysopt does a pipe selection based on the BBRI (Belgian Building Research Institute) standard report number 14. The standard is based on the maximum velocity method and is typically used for pipes inside a building (relatively low velocities are allowed because of noise pollution).
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This way, any standard for pipe selection and/or pipe physical properties can be implemented and applied in our software.
How can I modify the pressure profiles for pipes during pipe selection?
First of all, download the default pressure profile file we provide, by clicking the "Download" button in the "Pipe Settings" tab of the Settings page.
This will download a "pressureProfile.xls" file to your PC.
In order to edit this file, use Excel. You can configure a maximal pressure loss per meter and/or maximal fluid velocity.
Both velocity and pressure loss serve as 'hard' filtering criteria. A pipe diameter is NEVER selected when the pressure loss is larger than the maximum, or the velocity is larger than the maximum velocity. When target pressure losses are supplied, the pipe diameter is selected from the set of diameters which are allowed (by the above criteria), and which has the smallest deviation from the target pressure loss.
Summerized : when both are supplied the most restrictive is applied. A "0" value is ignored.
Cibse guide CP1 for pipe sizing (external pipe network)
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