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  1. jmk0407

    What is the better system for an auditorium?

    Just putting together a pros and cons list for the HVAC for an auditorium, and the two options I will present to the owner are PTACS in the windows (approximately 6 total), and the other being infrared heaters coupled a 90 ton air cooled chiller in a mechanical room adjacent the auditorium with...
  2. jmk0407

    Clean Room Design Help

    woldfield are you sure you're ready to be able to design a clean room? they aren't your normal ball of wax. i would suggest maybe getting someone else who knows what he or she is doing.
  3. jmk0407

    Horticulture Grow Room Cooling

    Is modulating hot gas reheat available during low-ambient conditions also? I have yet to hear back from the manufacturer, so I just want to see if this is even an option.
  4. jmk0407

    Horticulture Grow Room Cooling

    I am working on a plant grow warehouse consisting of 40 grow rooms to be maintained at 72 deg. F, 45% RH. I am looking at cooling each "bloom room" using a packaged 7 ton DX unit with modulating hot gas reheat and variable speed digital compressors for cooling and dehumidification. Each bloom...
  5. jmk0407

    Estimating latent load in a grow room

    I know about the load calcs, but my big question is wuantifying the moisture generation in the space due to the plants. Thanks for answering!
  6. jmk0407

    Estimating latent load in a grow room

    Also, it is a recirculating system. No outside air will be introduced into the space.
  7. jmk0407

    Estimating latent load in a grow room

    I am currently engineering an HVAC system for a plant growing warehouse (marijuana, in a legal state). The client wants to maintain 72 deg F at 40% RH in the grow rooms. I am trying to estimate the latent loads in one of the grow rooms (around 400 square feet) so I can ensure the system is...
  8. jmk0407

    Nitrogen Blanketing versus Floating Roof

    Thanks for the info. To clarify, I meant using an unblanketed internal floating roof tank in lieu of nitrogen blanketing a fixed roof tank.
  9. jmk0407

    Nitrogen Blanketing versus Floating Roof

    From a product contamination standpoint, is nitrogen blanketing a fixed roof tank preferable to using a floating roof tank? I am working on a jet fuel tank farm and am looking into any cost savings that would be associated with decreasing the load on the nitrogen generator at the expense of the...
  10. jmk0407

    NFPA 30 Tank Separation Calculations

    Thanks for your help! I wasn't sure what would be a more appropriate forum but figured that there is enough overlap.
  11. jmk0407

    Pumping Rates to/from Truck and Rail Loading/Unloading Areas

    I am trying to size pumps from a tank farm to truck and rail loading areas for jet fuel/diesel bulk storage. Are pumping flow rates to/from truck and rail loading and unloading stations simply based on the time to fill or empty a rail car or tanker? If so, is there a rule of thumb for how fast...
  12. jmk0407

    NFPA 30 Tank Separation Calculations

    How does one calculate tank separation distances for groups of tanks larger than 2 tanks by 2 tanks in accordance with NFPA 30? Say if I have a grid of 3 tanks by 3 tanks, all floating roof, all with flammable liquids for the sake of this question. Is it one uniform tank distance calculated by...
  13. jmk0407

    NFPA 30 Tank Separation Calculations

    How does one calculate tank separation distances for groups of tanks larger than 2 x 2 in accordance with NFPA? Say if I have a grid of 3 x 3 storage tanks, all floating roof, all flammable for the sake of this question. Is it one uniform tank distance calculated by summing every possible...

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