Browse By Tags

  • WATER GEMS

    Hi I have a problem . I have a project to connect two tanks of 24 " and a section of the pipe turns around almost 290 degrees . how affect this return ?
  • Hammer: Surge Tank Initial Level

    When modelling a surge tank it is necessary to dictate the initial level. When the steady state conditions are calculated, this seems to not affect the surge tank initial level, even if it does not match the head at the point on the line where it is installed…
  • Unusual Flow Results

    I'm getting some unusual results and am unable to find a solution. I'm trying to better calibrate our model near an area where 2 pressure zones meet. I've performed a fire flow analysis and tried to confirm the pressures and flow in that area. A flow…
  • Hammer: Turbine Curve in Relation to Quadrant Curve

    Hi I wish to clarify how the Turbine Curve should be sourced for inputting into Hammer in relation to which quadrant curve is being used. I understand the Quadrant curve is defined by the selection of the specific speed. In my case, I am picking a…
  • Hammer - Modelling vertical pipes

    I am modelling a hydro scheme which features a vertical shaft directly at the intake. So lets says the intake is J1 at elevation 100m and drops to J2 at 50m by a 50 m length of pipe before completing a 90 degree bend to horizontal. Whe using the profile…
  • Re: Hammer: Pelton free-surface tailrace surge

    Hi, thanks for your reply. You are correct; I am looking at the pipe carrying the water away. I have attached a basic sketch. I am modelling the pelton as a TCV followed by a D2A so I can have multi-stage valve control. Typically I would only be interested…
  • Modeling Mulitple Ponds in Series

    I'm trying to model a set of small ponds each connected in series. The ponds recieve water from their respective drainage basins, and from water overtopping or seeping from the upstream ponds. The ponds would overtop through a weir after achieving max…
  • Re: Watercad - Looped System Modeling

    Great answers Kim, I have a few approaches to add - first let me rank the approaches in preference. 1) The full model with all controls is always best to determine the most accurate performance (this involves a good deal of set up, controls, and…
  • Average Demand Calculation and Fire Flow

    My model is fine and everything works fine however the design criteria for demand is 2.1 multiply by the average demand + Fire Flow (as indicated in the snapshot) I have setup the Scenarios and alternative for this criteria based on the BASED DEMAND…
  • WaterCAD age calculation fails

    I have run into a recent problem. I've been trying to do a age calculation on our water system and for some reason the largest duration I can calculate is 128 hrs. If I change it to 129 hrs the calculation fails and I get an error: Calculation Engine…
  • WaterGEMS - Variable Speed Drive

    Dear Bentley I am trying to Model a VSP pump and I am using WaterGems V8i (Select Series 3) I want to model a a situation where I got a pump which is greater than the required capacity . So I am planning on using a variable speed system to reduce…
  • Use of LoadBuilder

    Hello There, Is anyone could help to explain how to use LoadBuilder? I have imported scaled network, I can obtain all information as such population density, Land use Pattern etc. My problem is I want to assign demands according to area and population…
  • How to Model Partially Closed Valve with FCV Valve data

    Hello everyone, Can anyone please put some light to explain how to model partially closed FCV\TCV with specific valve data as shown in screenshot or file attached.
  • Be Connected: An Introduction to Bentley Expert Designer Water V8i

    Be Connected Seminar An Introduction to Bentley Expert Designer Water V8i Live Broadcast: July 21, 2009 | 10:00 AM (US Eastern) Speaker: Alfredo Contreras, Bentley Description: Learn how to take advantage of Bentley Expert Designer…
  • Darwin Calibrator Inactive Elements

    I'm fairly new to the software and have been going through the on demand courses. I have a decent understanding of how Darwin Calibrator works but I'm struggling with one thing. I have numerous inactive pipes in my model. Typically these are either…