After the action "compute design flows" you go to the next step "Select pipes"
The selection of the pipes is based on the following standard
In the figure below you see the selection of steel pipes of a Hysopt-model.
It is possible to change the pipe diameter manually. For example if you have a large amount of DN32 pipes and a small amount of DN25 pipes, the user can manually change the DN25 into a DN32.
You can view this example with the following token: Mjg4fFQ3TnIzVkVr
The Hysopt software supports 3 methods for pipe sizing:
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).
The user can change the pipe sizing method by first clicking on the button in the top right corner of the screen stating "model settings".
A popup window will appear where the user can change different design options including the pipe types and pressure profiles. The user can change everything by exporting the excel sheets, changing them, and importing them again. The user can export the pipe types and pressure profile by clicking on the white cloud buttons and import them by clicking on the blue cloud buttons.
This way, any standard for pipe selection and/or pipe physical properties can be implemented and applied in our software.
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.
The Cibse guide CP1 is often used (in the UK) for sizing pipes in external pipe networks (e.g. district heating).
At this moment our software only supports pipe sizing based on the maximum velocity, the maximum pressure drop per square meter, and the target pressure drop per square meter. However, in the Cibse guide, the pipe sizing is done on typical (or target) velocity.
To still be able to size pipes based on the Cibse guide, excel sheets are created which design pipes based on the max velocity method, but with almost the exact same results as the typical velocity calculation presented in the Cibse guide.
The excels are thoroughly tested and can be implemented in our software:
