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Parsa Pezeshk

Parsa Pezeshk

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  • RE: Valve in WaterCAD

    Jesse Dringoli
    Jesse Dringoli
    Parsa, does "BFV" mean Butterfly valve? Can you provide a diagram to illustrate the configuration you are trying to model? Are you just wanting to place a valve that can be opened and closed? You can do that with the pipe status field (open or closed…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Turning on VSP based on Condition in WaterCAD

    Sushma Choure
    Sushma Choure
    Hello Parsa, What error messages do you receive after you set controls for Pump Set 3? OR is it unable to solve hydraulic calculations kind of error? More details about it would be helpful. Does the below situation describes your case as well, please…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Problem setting up a booster pump station with a storage tank control node.

    Jesse Dringoli
    Jesse Dringoli
    Parsa, the top fill inlet pipe is treated as a PSV internally so I would have expected similar results (assuming no use of throttling inlet valve). Perhaps the issue was with the inlet invert level vs. elevation confusion as mentioned in my previous reply…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Node Element for Future Growth Flow to Force Main

    Sushma Choure
    Sushma Choure
    In addition, here is link to the article on modeling connection to an existing system which you would find helpful in your modeling case. Modeling a Connection to an Existing System
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Node Element for Future Growth Flow to Force Main

    Sushma Choure
    Sushma Choure
    Hello Parsa, Usually designers proceed with models being close to what design conditions are on field, it should be a replica of your field conditions. However if you would like know how would system react if there is additional load in future from…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Parallel pumps with tank as control node

    Jesse Dringoli
    Jesse Dringoli
    Hi Parsa, due to the parallel VSP rules (see "Criteria for parallel VSP’s" here ), you'll need to use the first arrangement where the pumps are more directly connected to a common upstream and downstream node. See also "Option 1" here .
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Pipe Network Geometry in HAMMER

    Jesse Dringoli
    Jesse Dringoli
    I thought of an addendum to my last bullet point: The angle of the pipes would not impact wave propagation, dampening or reflection. It is the minor loss at such bends (and any diameter change) that would impact it. Typically minor losses are minor…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Pipe Network Geometry in HAMMER

    Jesse Dringoli
    Jesse Dringoli
    Some additional detail to add to Scott's response: For the physical properties of pipes, HAMMER only "sees" the pipe length, friction factor and diameter. If the pipe is using scaled length, the length will account for bends. If minor losses are…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Pipe Network Geometry in HAMMER

    Scott Kampa
    Scott Kampa
    Hello Parsa, The location of the bend is not applied to the minor loss calculation. I would add that if you are doing force calculations , you may want to replace the bend with a junction . Bends in the pipe are not recognized in force calculation,…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: HAMMER Results-Pump Shutdow

    Scott Kampa
    Scott Kampa
    Hello Parsa, You can see flow in and out of the hydropneumatic tank that seems to correspond with the changes in hydraulic grade. That flow in and out of the tank is going to or coming from the downstream reservoir. I added this as a report point in…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Number of Pump Cycles

    Jesse Dringoli
    Jesse Dringoli
    Thanks for sharing Parsa and for reminding me about the relatively new pump status field . I referenced your post in the wiki article as an example.
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Pump Head and Flow

    Jesse Dringoli
    Jesse Dringoli
    Parsa, a smaller Accuracy calculation option may help but it may also depend on the pump definition type. A best-fit quadratic curve is developed based on the points on the pump definition head vs. flow table. If you are using the "multiple point" pump…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Transient Analysis of a Pipe Break & Hydrant Flushing

    Sushma Choure
    Sushma Choure
    Hello Parsa, For both of this cases you can use discharge to atmosphere - D2A element, more details below. Here is technote on modeling D2A element, please go through it for its different applications. Modeling Reference - Discharge To Atmosphere…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Water Level (min and max) in a Sealed Tank during Transient Event

    Jesse Dringoli
    Jesse Dringoli
    Hi Parsa, HAMMER can only track the water level change in a hydropneumatic tank if it knows the physical dimensions. Set the tank's "Elevation Type" to "variable elevation" and define the variable elevation curve. The resulting volume from this curve…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
  • RE: Pressure Sustaining Valve % Closure During Transient in HAMMER

    Yashodhan Joshi
    Yashodhan Joshi
    Hello Parsa, We have a dedicated article which explains in detail about using modulated PSV's in operation in response to transients in HAMMER. Please note that modulating PSV's and FCV's are available in the latest build of HAMMER i.e. CONNECT Edition…
    • over 2 years ago
    • OpenFlows | Water Infrastructure
    • OpenFlows | Water Infrastructure Forum
>
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