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  • Users: lfc09
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  1. lfc09

    Geothermal Heat Pump Design

    I work for a MEP consulting firm and our client wants us to explore using geothermal as an option. My question is do MEP firms sub out the well design (open or closed) to a certified geo-exchanged designer? Is it delegated design for contractor?
  2. lfc09

    Three way control valves

    I am looking for the Cv for three way mixing and diverting valves. Does anyone know a manufacturer I can look at?
  3. lfc09

    Butter fly valves vs. gate valves

    What would be the pro and cons of using butterfly valves instead of gate valves for open/close applications!!
  4. lfc09

    Mixing Box

    Do supply and return dampers on a mixing box for an AC Unit have to be physical connected using linkage? Is there a way to link them via motor controller?
  5. lfc09

    Three Way mixing valves

    The system will be constant. Thanks btw
  6. lfc09

    Three Way mixing valves

    Is better to use a diverting valve or mixing valve at the AHU on a chilled water system?
  7. lfc09

    Steam condensate question

    If I have a LPS entering a coil, but I can not return by gravity. I have to pump the condensate pump back to the bfu, how do I calculate gpm. Do I just find lbs/hr and then calculate using 1lb-water/hr = 8.34 gallons/lb-water x 60min/hr x SG which gives me 1lb-water/hr = 500 gpm or do I...
  8. lfc09

    Constant Volume system w/ perimeter heat

    To augment my question: CV AHU = 28000 cfm OA = 5000 cfm Trm = 72F Tmix = 62F The perimeter radiation negates all my envelope loads. What should my Tlat for winter be? Do I even have to add heat, with the negation of my heat loss, I will actually have a heat load in the space.
  9. lfc09

    Constant Volume system w/ perimeter heat

    I have an office space with a CV AHU and steam radiators at the perimeter. The question I have is what is the LAT off the preheat coil during winter months? *Assume the perimeter heat negates my skin loss! *My mix air temp is 61F

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