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  1. joejoedancer

    Pumped Coil or Integral Face & Bypass Damper??

    Wondering if some folks in the northern climates can comment on which method you prefer for hot water preheat coil freeze protection. Thx.
  2. joejoedancer

    Gas Service Line size ?

    the international fuel gas code has an appendix section that has an excellent example problem illustrating the correct way to size gas lines based on effective length of piping, inlet pressure and allowable pressure drop.
  3. joejoedancer

    trying to quantify VAV airflow needed in economizer mode

    BronyrAur, I'm thinking you could come up with this by changing the outside air design conditions in a load program such as TRACE or HAP. Assuming there exists a load calc run with one of these programs or other equal, keep all your envelope criteria and internal loads the same, and simply...
  4. joejoedancer

    Condensing Vs Non-Condensing Boilers

    Thanks Imok2, I will be sure to check that out.
  5. joejoedancer

    Condensing Vs Non-Condensing Boilers

    Since the keyword search function is down, I couldn't find out if this is a repeat question, so I apologize if it is. My question: Are there any references, websites, energy modeling studies that you can point me to where an analysis of whether condensing boilers with low temp heat recovery...
  6. joejoedancer

    low temperature VAV systems

    anecdotally, you hear different versions of what route (conventional VAV supply temps, low VAV supply temp, UFAD) results in the lowest life cycle cost, but there must be some energy modeling studies done that have determined this for various climates and facility types. Not seen any yet though...
  7. joejoedancer

    setting or checking delta pressures on liquid chillers

    Try the Trane website. They have excellent free engineer's newsletters that provide application assistance with chiller system configurations (parallel, series, variable primary, primary-secondary). They also have more in-depth info for a very nominal fee, many are comprehensive design manuals...
  8. joejoedancer

    Water Side Economizer Control Sequence

    Thanks absrbrtek and quark, I will try to get my paws on a few example control sequences.
  9. joejoedancer

    low temperature VAV systems

    Marcoh, don't forget another "con" in the form of decreased chiller efficiency if you are lowering your chws temp to achieve the colder discharge air temp. If you are staying with the same chws temp, your fan horsepower savings recognized from lower airflows will take a small offsetting hit from...
  10. joejoedancer

    Moliere diagram

    psychormetric analysis version 5.1.2.
  11. joejoedancer

    Moliere diagram

    Per quark's attached links, I have had personal experience with the handsdownsoftware psych chart, and it is very user friendly and you can easily plot all the typical air conditioning processes
  12. joejoedancer

    Water Side Economizer Control Sequence

    Editorial Comment First: This is an awesome forum that I wish I came across long before today, and I'm looking forward to reading and contributing. Questions: What is/are some of the more reliable and trouble free control sequence(s)and system piping configuration for automatically switching...

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