Hello,
I have an issue with hydraulic calculation which are made for ventilation installation.
What I need is to calculate a pressure loss on a ductwork to fit a correct fan or ahu. For those who are not a sanitary engineers i explain that for that calculation I have to total linear loss which depands on duct's roughness and lenght and local losses which are couses by changing duct direcion, dimensions etc.
ABD has a tool called Duct System Sizing Dialogs but what I find is that it calculate only a linear losses and not even for duct's size which I drawn in a model but for duct's size which is set on settings>limit duct velocity. And here my question:
- can ABD callculate also local losses causes by elbows, transitions etc?
- can I set Duct System Sizing tool to make a calculation for a duct's size which I drawn on a model?
- can I export that calculation to an exel file?
It seems that without program's abilty to make that simple calculations I will have to find out another program to make it. Does anyone know a program which is working with aecosim and can make those calculations?
I am not a mechanical engineer, but my understanding of the Duct Sizing Utility is that it does take into account the pressure losses caused by all elements in the system it " uses a combination of the accepted algorithms to size duct based on the constant velocity and equal friction methods prescribed by industry standards such as ASHRAE and CIBSE. This workflow consists of allowing you to first route duct systems in a single line exercise to create a complete HVAC system, size the fan requirements and duct sizes and rebuild the system as calculated."
The workflow is described in the help documentation, there is a lot of detail on how the Duct Sizer works. Also take a look at the training sessions AECOsim Building Designer Mechanical - HVAC Design.
Regards
Marc
Answer Verified By: Tomasz Magiera
Thanks
I have checked that materials and it only assure me that ABD has not any tool that will allow me to make a specific hydraulic calculations after drawing a ventilation ductwork. The same situation is with revit and for that reason engineers are using for example magicad to make calculations.
My another question is does anyone knows any program/overlay that will work with aecosim and make calculations for ductwork which is drawn in aecosim?
Tomasz, I think that you will have better luck if you post in the Building Performance forum. communities.bentley.com/.../113905 Apparently, Hevacomp has something called Netsys that sounds like what you are looking for.
Hello Thanks for U help but I am looking for program which is calculating a pressure loss on a whole ductwork after I drawn it. ABD's duct sizer is a tool which is setting a duct's size according to a parameter which U define for example velocity or linear pressure loss. But as U know creating a ductwork many times requires duct's velocity changes in a place where there is not enought space. After drawing huge and complicated ductwork it is necessary to choose a correct fan/ahu where we have to include linear and local pressure loss. As I spoke with colleagues from different officess they are using for example magicad for revit files. Does anyone know such program which is working with ABD?