Heat Extraction Calculation

Discussion in 'Maintenance and Troubleshooting' started by bulletpro, Jan 2, 2011.

  1. bulletpro

    bulletpro New Member

    Does anyone have the calculation for determining the amount of Heat Extraction from a geo system?

    I have seen an old reference to the calculation being....."T-Delta X GPM X Brine", but I have no idea how to evaluate "brine" when I have a open loop fresh water water source.

    I am trying to evaluate the efficiency of my system and could use this calculation as a part of the toolbox.

  2. urthbuoy

    urthbuoy Well-Known Member Industry Professional Forum Leader

    Brine = 500 for water
  3. bulletpro

    bulletpro New Member

    thanks. Much appreciated.
  4. pjssailor

    pjssailor New Member


    Thank you both. Just getting ready to look for that
  5. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    500 is a constant arrived at as follows:

    60 minute per hour X 8.333 Lbs per gallon X 1 btu per Lb per deg F

    The 500 changes a bit for loop fluids other than pure water, because the "sub constants" of 8.333 lb per gallon and 1 btu/lb-degF don't hold for other mixtures.

    All hours have 60 minutes, excepting the one at the end of which I've promised myself a beer.

    Hope that helps

Share This Page