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  • Users: MarauderX
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  1. MarauderX

    Merits of 4 fps flow

    Currently we are designing condenser water piping (40-90 degrees F water) to be flowing at 4 feet per second or less. Sure it is great for acoustics, but the piping ends up being upsized a lot along the way, and it will cost more. Another senior engineer is insisting this method of design...
  2. MarauderX

    Primary/Secondary flow issues?

    Will there ever be a problem with primary pumps overwelming the secondary pumps? The only condition I can think of is that the bypass isn't large enough and there is little demand on the secondary.
  3. MarauderX

    Data Center Temperature

    Hey, does a warmer operating data center make you nervous? We are looking at providing a data center with a 75 degree supply temperature and a 95 leaving temperature from the servers. This increased temperature difference allows for an HVAC system with a better configuration, but what does...
  4. MarauderX

    Exhaust plume calcs

    Hey, so I was leafing through my ASHRAE manuals and found that I am missing my 2003 Applications. I'm looking to calculate the plume from generator exhaust; does anyone have any spreadsheets or even just the equations needed to find acceptable dilution? www.vanderweil.com
  5. MarauderX

    Coastal air conditions

    All - We have a data center located about a mile inland from the coast. They are considering putting in an air-side economizer and we are concerned about the salt water effect on the IT equipment. I don’t know all of the project particulars. Does anyone have any experience installing airside...
  6. MarauderX

    Online/Digital Ductulator

    Does anyone know of a free online or digital ductulator I can use? I'm currently working on a Windows machine. Thanks in advance - MX www.vanderweil.com
  7. MarauderX

    Heat loss from an outdoor fountain

    Does anyone have recommendations on how to calculate the heat loss from a water fountain running in the winter? We are looking at the viability of running it with heaters, but it depends on the load. Thanks in advance! www.vanderweil.com
  8. MarauderX

    P-trap feed water detail?

    Does anyone have a P-trap detail that has an automatic water feed to the trap? How does this work? John Peterson www.wba-arch.com
  9. MarauderX

    A/E firm examples??

    I am trying to get a firm grasp on the new Project, and I thought it would easy considering I used the 98 version. Times change, and the program has become really complicated; are there any great tutorial guides to help me along? Does anyone have a good example they could share for...
  10. MarauderX

    Why use STBs vs CTBs???

    Hey, we are in a class setting up ACAD 2005 Building systems. Because of our last project, the 'CAD committee' is pushing to use a CTB table with color=lineweight, and a few of us want to stick with using a STB so that we can change the colors to whatever we want and have them plot out...
  11. MarauderX

    Building Booster Pump

    Hey, I need some help on whether a building served by a well pump needs to have a booster pump too. I haven't dealt with this type of system before, so any help would be great. The current well pump was tested and was 60 GPM @ 0 PSI, 40 GPM @ 60 PSI. I need 59 GPM @ 50 PSI. Do I need to have...
  12. MarauderX

    Residential coil freeze

    We have a residential system where the coil keeps freezing up overnight. The air flow is good and the filters have been changed... what are the other possibilities of things gone wrong? Is the night set-back requiring too little air flow and then the coil freezes? Or is there something wrong...
  13. MarauderX

    Steam tunnel fan experience?

    I didn't readily find any steam tunnel fan threads, so I thought I would ask... Does anyone have any experience installing/replacing steam tunnel fans? More specifically, should the size of the fans be based on a volume air change per hour, or by estimated heat loss to the tunnel from the...
  14. MarauderX

    AutoCAD 2004 Bldg Systems - Tools & tips

    I'm just diving into ACAD 2004 Building Systems, and looking for some help with getting up to speed. Any links and other suggestions to help me get jumpstarted would be most appreciated. Thanks in advance - John
  15. MarauderX

    Elevator pit pump

    Anyone have experience with pumping ground water out of an elevator pit? The project is existing, and the elevator pit is below the nearby water table. Thanks in advance - ~MX
  16. MarauderX

    NFPA 13 '96 Sprink storage tank size?

    The initial comment passed around: "Site does not appear to have available city water and we will have to use the existing well for Domestic Water. As far as Fire Protection is concerned, there will be a need for a Fire Pump as well as a water Storage tank. The storage tank needed for this...

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