Search results

  1. E

    Oil pressure as it relates to efficiency

    I'm not sure what a Naturally aspirated Chevy will take, but do the math on this Buick I used to own, 3750 pound car, 455+.040, best 7.003 ET 1/8 mile times, built on a picnic table in the backyard. My freind has a about a 5500 pound Buick Estate Wagon, it's kinda high tech for a street car...
  2. E

    How to calculate thermal exchange rate of water inside Pex piping.

    A lot has changed since I posted this. First off, the shop burned to the ground, Major set back. The up side to it, is I now have a newer all steel building better insulated to work in when I finish it. I also enlarged it slightly, it was 60Lx40Wx16T, Now it's 62Lx44Wx16T. The old building was...
  3. E

    How to calculate thermal exchange rate of water inside Pex piping.

    Thanks, I'll work on it a little while longer tonight. I have to get up in 5 hours to go to work.
  4. E

    How to calculate thermal exchange rate of water inside Pex piping.

    Ignore the last post, I just read what they are, sorry. I guess it's too late for me tonight.
  5. E

    How to calculate thermal exchange rate of water inside Pex piping.

    What do the below stand for as units from your spreadsheet? Is k/s Kelvin/seconds? How do I apply your spreadshet to find how many feet of Pex I need to get the required cooling? I expanded your sheet up to the 12T limit of my air handler. v w r k/s x T/To To
  6. E

    How to calculate thermal exchange rate of water inside Pex piping.

    If you would, e-mail it to me and I'll look at it. To be quite honest, I'm not the sharpest knife in the drawer. I seem to have a knack for figuring things out one way or the other. It's like the heating system for my shop. It's radiant heated concrete, one of the best ways to heat areas like...
  7. E

    How to calculate thermal exchange rate of water inside Pex piping.

    I just reread your post. This system will only be used when the ambient air temp is 80*F or higher. The hottest I've ever seen here is 106*; at worst it'll get to maybe 100* once in a while in the summer. It's never been over 101*F in my shop when I'm working. The ground water temp is always...
  8. E

    How to calculate thermal exchange rate of water inside Pex piping.

    The 3/4 Pex is going to be submerged in a tank of water. The ground source water is going to be3 constantly turned over and dumped. The water inside the 3/4 pex is going to be circulated through a cooling coil in my air handler and retured back through the 3/4 Pex to be cooled again in a closed...
  9. E

    How to calculate thermal exchange rate of water inside Pex piping.

    I want to figure out how much 3/4 inch Pex pipe/tubing I need to use to get 4-5 Tons of cooling. Air conditioners are rated in three ways, by B.T.U.'s, Tons of Refrigeration, or by Horsepower. One Ton of Refrigeration removes the amount of heat needed to melt one ton of ice in 24 hours...
  10. E

    How to calculate thermal exchange rate of water inside Pex piping.

    PEX tubing thermal conductivity: 2.43 BTU in/hr-ft^2-F per DIN52612 3.2 (Btu in /h ft2 oF) 2.4 BTU/(hr)(ft2)(°F/in) with ASTM TEST METHOD C117, I'd figure it at the low side of 2.4 rating. I have the vapor barrier type in my concrete floor noe because of the iron in the heating system I...
  11. E

    How to calculate thermal exchange rate of water inside Pex piping.

    How can I figure out how to calculate the heat/cooling exchange rate of water inside pex tubing? I want to build a ground source cooling system simular to a chiller system but I want a closed loop system. My game plan is to pump ground water into a holding tank that is constantly flowing ground...
Top