dpc183
Civil/Environmental
- Sep 29, 2010
- 1
As a part of evaluating a switch from WaterWorks to EPANet for our water flow modeling software, I am back-checking some of our former reports to both make sure that EPANet gives comprable results and to make sure that I know how the software works. But, I've been running into a snag.
I'm trying to model an existing commercial site we are designing an expansion for. While our field fire flow test was performed at a relatively hydrologically remote area (but directly adjacent to the building utility entries), we were able to model the building supplies and fire flows at that point in WaterWorks. However, when I try to re-create the model in EPANet, I can't get the model to confirm the fire flow data. I have tried modeling a pump on the system based on the supply data and moving the pump in an attempt to confirm the results. Also, I've tried using reservoirs off-site with sufficient head to supply the measured static pressure. Neither of these techniques have worked. When I run the model with the test parameters (flowing at two test hydrants and measuring the pressure at the residual hydrant), the modeled pressure is 8 to 10 psi higher than the tested pressure.
Is there a way to force EPANet to model the pressure versus flow relationship we obtained from the field fire flow test?
I'm trying to model an existing commercial site we are designing an expansion for. While our field fire flow test was performed at a relatively hydrologically remote area (but directly adjacent to the building utility entries), we were able to model the building supplies and fire flows at that point in WaterWorks. However, when I try to re-create the model in EPANet, I can't get the model to confirm the fire flow data. I have tried modeling a pump on the system based on the supply data and moving the pump in an attempt to confirm the results. Also, I've tried using reservoirs off-site with sufficient head to supply the measured static pressure. Neither of these techniques have worked. When I run the model with the test parameters (flowing at two test hydrants and measuring the pressure at the residual hydrant), the modeled pressure is 8 to 10 psi higher than the tested pressure.
Is there a way to force EPANet to model the pressure versus flow relationship we obtained from the field fire flow test?