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  • Users: atlas06
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  1. atlas06

    Hybrid chiller plants

    We are evaluating an alternate for an 800-ton chiller plant. One of teh alternates we intend to study is a Hybrid chiller plant using (1) 400-ton adirect fired absorber, (1) 300-ton cnetrigugal chiller; and (1) 100-ton screw chiller (which is intended for the 24-hour cooling). When you figure a...
  2. atlas06

    Should I take the department head position?

    Hello all, I am at a point in my career where the only way to go up is to move up (to management). I have been approached for a department head position three times in the past 6 months, without looking for it. I feel totally capable of running a department, I've done it several times replacing...
  3. atlas06

    Belt Drive or Direct Drive?

    Some manufacturers claim that using Direct Drive is much cheaper in maintenace because no need for belts adjustments and so on. I am talking about fans over 1000 CFM, not 200 to 700 CFM kind. From an operation, equipment life, maintenance and Performance stand point, should one specify a direct...
  4. atlas06

    What's your experience with Duct Sox?

    I have seen some duct sox in operation at the Gym for about two years now. I have an application for such a thing but I hesitate about the durability and maintenance of this material. I've seen some with a type with linear slot of holes and a other totally perforrated types. I can see that it...
  5. atlas06

    When do you need a Building Engineer 24-hours a day?

    Hello all, We have a kitchen application using a steam boiler for kettles rated at 1800 LBS/HR. We were recommending two boilers sized at 2/3 each for continuous operation during maintenance and redundancy. At what Boiler Plant capacity does one need to have a buidling engineer 24-hours per day...
  6. atlas06

    Can you return air from a Laudry room using Gas-fired dryers?

    We have a Commercial laundry room using 5 gas-fired dryers. Can one return air from the space to the AHU? I remember reading a ANSI 4 CFM/1000 btuh of OA rerquirement with sliding scale of OA somewhere here in this forum for recirculating units. I am still searching for that thread, if anyone...
  7. atlas06

    Energy modeling software

    Which software would you recommend for Energy Modeling? Is there any training that you know of that is worth the money? we are looking at sending a couple of guys at work for training and would like feed back from people that might have gone through any one of these seminars. We are in the...
  8. atlas06

    Electrical Room cooling load

    Does anyone know of published data for sizing electrical rooms cooling loads (heat from switch gear equipment and tranformers), besides the 2% rule (some say 1.5%) of total load (KW) is heat radiated to the room. Others will say use 50 btu per KVA for enclosed transformers (dry type). We...

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