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  • Users: JVKS
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  1. JVKS

    Erection of chillers

    Viagra design and Testosterone rigging are the best at chiller erections. if you stress the system to hard you may have trouble. sorry guys this was to much of straight line to ignore.
  2. JVKS

    Heat loss from buried pipe in "concrete conduit"

    oops! really meant to put this in the HVAC thread but this will do. the length is hundreds of feet and in reality varies between 8" to 2" and to make it more complicated the conduit in areas is crushed, missing insulation, leaky steam pits, steam pits fill with water and run down the conduits...
  3. JVKS

    Heat loss from buried pipe in "concrete conduit"

    looking to figure the heat loss from steam and condensate piping in a buried "concrete conduit." the conduit is a concrete tunnel about 1' tall by about 1' wide that is buried at a depth from 3' to 10' - hilly terrain. the conduit is open at both ends to the steam pits or buildings. the steam...
  4. JVKS

    Controls: Open or not? do we care!?

    open protocol is a great idea and depending on the size of the project I would always recommend it. it allows a single central computer to control many different maufacturers equipment. keep in mind that the underlying controls in the individual buildings are still that manufacturers...
  5. JVKS

    Heat Loss/ Gain Calculation

    I started out doing hand calculations. the people i trained under were not computer savvy and the only person who had a computer was the secretary. similar to the computer programs we manually filled out sheets(room size, height, orientation, u values,etc.) and manualy crunched the numbers...
  6. JVKS

    BMS Retrofit payback

    Yep when the current generation of fitters that has worked on pneumatics retires there will be systems out there that few understand(includng a few i designed) Having said that there are good reasons pneumatics has gone bye-bye. decrease in installation costs, increased reliability, younger...
  7. JVKS

    Occupancy sensor tied to VAV box dual minimum

    I am doing a project now in a college where we are wiring in the occupancy sensors to setback the VAV boxes in addition to shutting off the lights. the DDC VAV box controllers we are using have a seperate input for an occupancy sensor that will put the box in stand-by which is just a reduced...
  8. JVKS

    BMS Retrofit payback

    are you asking for the savings for just the portion of converting from pneumatic to DDC or the pneumatics to ddc along with the VSD, VAV, DX? just a pneumatic to DDC conversion based on energy payback alone is long(15 to 20 years if not longer) and difficult to calculate. there are lots of...
  9. JVKS

    AC Units Linked w/Evaporative Coolers

    I have seen sprinklers run on condensing units to help cool on hot days - basically the system was undersized. what they found in the long run is that all the minerals in the water came out solution on the condensing unit fins restricting air flow and making it worse. a pad may be different...

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