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Recent content by EloyRD

  1. EloyRD

    AFT impulse

    Which version of Fathom are you using? In my version, I run each scenario individually after selecting it in the scenario manager. Each child scenario shares the same characteristics of the parent scenario, except those that are explicitly changed. Regards.
  2. EloyRD

    Siphon for connecting two reservoir

    @dhengr Thanks for your comments. I'll check with the civil guys the proposed option and I'll investigate further about air bags as caps, it seems like a really good idea for my application. The expression that you commented is related to the option of connecting the bottom of the two...
  3. EloyRD

    Restricted orifice

    You have to work backward from your requirement. You have a point where you have a requirement of xx l/s @ yy bar (only stating flow is incomplete information). If you are supplying to a sprinkler, an orifice, a heat exchanger, or a hose, pressure is linked to flow. Then you have to add losses...
  4. EloyRD

    control valves

    You are right, there is conservation of mass upstream and downstream of the CV. What enters a pipe must be the same that goes out of it.
  5. EloyRD

    control valves

    Sorry, now I think that I misunderstood your doubt. Every time you change a parameter (like throttling up or down a valve) you'll be in transient state until you reach steady state (that is the situation that is calculated by EPANET). The system will stay there until a parameter change. If...
  6. EloyRD

    control valves

    Hi anber, Could you explain how does the system demand changes from start-up to normal operation? I understand that you have a pump feeding a manifold and there are many pipes branching out. Do you know the system curve of each branch? If it is more than 3 branches, you could alleviate some...
  7. EloyRD

    Siphon for connecting two reservoir

    @bimr Thanks for commenting. My design intent is in providing a way to start the siphon in any direction even when the water level in the fuller pond is at 2-meter. For the existing reservoir, my issue is in finding a way to operate the valve from the surface, as the valve isn't near a...
  8. EloyRD

    Siphon for connecting two reservoir

    @LittleInch Thanks for your answers. The civil engineer does not have information about the earth dam or the geomembrane and doesn't feel safe about modifying them. The client has a really small window to empty the reservoir of 5-days a year and we haven't found a construction process that...
  9. EloyRD

    Siphon for connecting two reservoir

    Thank you all for your comments. @pennpiper I was proposing 40-inch butterfly valves, but I have found really high torques for opening unbalanced valves. Now, I'm planning on replacing those with at most 20-inch valve and request a datasheet with low torque. My issue with the long stem is that...
  10. EloyRD

    Siphon for connecting two reservoir

    Hi, I'd like some opinions about guaranteeing easiness of operation of a siphon connecting two ponds. The installation is at sea level for irrigation, the configuration is: - there is an existing pond of 600,000-cubic-meters of water capacity and 8-meters of water depth. This existing pond...
  11. EloyRD

    VAV design guide

    Excellent material!!
  12. EloyRD

    Chiller Structural Foundation

    @EnergyProfessional Thanks for the input. I've been having a really difficult time getting information from my local dealers of Arctic, Smartd, and Daikin Chillers. They do not seem to be able to obtain a data sheet with vibration data from their headquarters, and my vibration isolation...
  13. EloyRD

    Chiller Structural Foundation

    Hi, everyone. I'm looking into the requirements that I should make to the structural engineer for the installation of a magnetic chiller in a roof. After looking into thread507-299291 I'm understanding that if he provides a 6'' maintenance slab and I specify that the equipment is provided with...
  14. EloyRD

    Fire protection of an airport terminal building

    @cdafd Actually, we are designing a new terminal for an existing airport. The current fire system is approved for the existent terminal, control tower, hangars and maintenance workshops; that system has its separate water storage and pumping system. For the moment, I'm opting into proposing a...
  15. EloyRD

    Fire protection of an airport terminal building

    @TravisMack I believe that you are right. I've designed systems for buildings and shopping centers according to NFPA 13 and 14 as you describe. But what confuses me is the private hydrants that are required by "NFPA 415 2.5.3: Fire hydrants shall be provided on both the ramp and street sides...
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