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  • Users: dblyle
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  1. dblyle

    Commercial Attic Ventilation

    So, I have large warehouse (~60,000 sq.ft.) in Dallas in which we are installing low temp coolers (36 degrees) in the space. The coolers are 4" IMP (insulated metal panel) and 16' tall. The Warehouse is 37' tall. Think "building in a building". Given that I have a very large "attic", I feel...
  2. dblyle

    Viewports don't use Plot Styles

    Sorry if this has been posted before, but I couldn't find it anywhere... We just upgraded to AMEP 2011, and for some reason, my viewports in paperspace don't use the plot styles we have set up. Even with the monochrome plot style, everything on the paperspace is B&W, but everything in the...
  3. dblyle

    Three-pipe system design

    We are currently replacing the chillers and controls in a three-pipe system - HW supply, CHW supply and common return. Has anyone seen a system like this before and can you give me a sequence of operation? I am trying to decide if we need another by-pass on the chill water side to allow the...
  4. dblyle

    Illinois Balancing Valve

    All, I ran across an Illinois brand Balancing valve that was installed around 1983. Instead of having to replace all 175 valves, I was wonding if anyone had heard of this brand, if they are still around, and/or if anyone had a copy of the balancing charts used with this valve? -DOUGLAS
  5. dblyle

    Cold Room Humidity

    I have a client with a cold room (insulated box), 12'(L)x 18'(W)x 8'(H) that is currently at 38 degrees F, 80% RH. She wants to the room to maintain 38 degrees F and 60% RH. I don't have much experience with cold rooms so I am really not sure how to get the humidity down. The room is...
  6. dblyle

    Wine Storage

    Need to keep a wine room at 55-60 degrees (room is 14'x2' with a 10' ceiling). Anyone have any suggestions as to what kind of equipment I should look at using?
  7. dblyle

    Interesting Iso Room Design

    Here's the situation: I have a small (~14x16) iso room which I am designing. To achieve the required ACH (including the anteroom, restroom, etc), I need a unit to produce 411 cfm. Here's the problem: 411 cfm of 100% OA doesn't really work well with a DX system (Location is in Houston, Texas...
  8. dblyle

    No Flow thru FCU???

    I recently replaced a FCU for a customer with a like-for-like unit. To my surprise, when we opened the valves, we experienced no water flow through the unit. The customer then informed me the system hasn't worked for 8 years or so, and I should just hot tap a different supply line (I thought...
  9. dblyle

    Survey

    We have been asked to survey a 12 story hospital to develop plans for replacement of all horizontal DWV pipe in the building. What typical things would/should a plumbing engineer be looking for on a survey of this type? Thanks...
  10. dblyle

    Motor Starter

    Can anyone tell me how to calculate the heat produced (i.e. what I would have to treat thru A/C) by a 40 Hp motor starter at 480 V? -DOUGLAS
  11. dblyle

    Not an Electrical Engineer

    Since I am not an electrical engineer, I have a question about Motor Control Centers and how to calculate the cooling load. I have a client with a MCC that he wants me to upgrade the AC. Obviously, the MCC is full of starters, breakers, etc. Do I size the AC based on the Hp rating of the...
  12. dblyle

    Bullhead Tee Pressure Loss?

    How do I calculate pressure loss thru a bullhead tee? The tee is 12" diameter and both flows CONVERGE into the branch. Not exactly the way I wanted it piped in, but I need to figure out if it will work or not. Any thoughts? -DOUGLAS
  13. dblyle

    Indoor package units?

    I have a customer that wants me to put package units (RTUs) on his control room which is inside a larger warehouse. The temperatures on the control room roof reach about 120 degrees and the roof of the larger warehouse is about 8 foot above. Everything in me says this won't work, but my client...
  14. dblyle

    Nursing Home Exhaust

    I currently have a client that was sited by the Texas Dept. of Aging and Disability Services for not having mechanical ventilation in his linen storage closets, Oxygen closet, nursing supply closet, and dry storage in the kitchen. Some of these I understand, however I am not sure I know the...
  15. dblyle

    Working with Architects?

    I just started a MEP consulting firm. Although I am a PE, I came from a contractor's background, so some aspects of the consulting world are new to me. When working with architects, how are the documents (i.e. AutoCAD files) securely transferred? Before someone responds with "EMAIL", let me...
  16. dblyle

    Determining GPM through a Circuit Setter

    Ok, here is my problem. I have a client that buys water from his building. He is on the top floor of a huge mall and they recently renovated the chill water piping system. My client doesn't believe that he is receiving the correct amount of water so he asked me to verify that he is getting...
  17. dblyle

    Industrial Ventilation for comfort...

    Ok, I visited a plant today where they make mechanical seals. The owner wants me to design an exhaust system to "move some air" in the building. The warehouse is large with several bay doors that are always open. It sits in the wonderfully cool climate of Houston, Texas where it is not very...
  18. dblyle

    Whirlpool and Shower Exhaust

    I just recieved a project for an athletic club locker room. The restroom area of the locker room has a whirlpool and eight (8) showers. Does anyone know of any standards in which to design the exhaust system for this area? I would like to exhaust the steam (from the showers and whirlpool) but...

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