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  • Chart Help?

    Was wondering if anyone had a link for temp degree rise for gallons to gallons.

    I know, it didn't make sense to me what I just wrote either.

    Example: 50 gallons of water at 120 degrees F will raise the temperature of x gallons of water at y degrees up to a temperature of z degrees.

    Thanks for any help.

    J.C.
    Last edited by BobsPlumbing; 12-15-2009, 08:03 PM.

  • #2
    Re: Chart Help?

    JC,

    I'm really not sure what you are asking but it takes 1-BTU to raise 1-pound of water 1-degree Fahrenheit.

    Mark
    "Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

    I never lost a cent on the jobs I didn't get!

    Comment


    • #3
      Re: Chart Help?

      heat exchanger?


      Take a gallon of 50 degree water
      pour in a gallon of 75

      what do you get.


      Well,from experience when I pee in a pool of 68 degree water...

      Comment


      • #4
        Re: Chart Help?

        Assuming there is no heat loss you get 2-gallons at 62.5 degrees.

        Mark
        "Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

        I never lost a cent on the jobs I didn't get!

        Comment


        • #5
          Re: Chart Help?

          Originally posted by ToUtahNow View Post
          JC,

          I'm really not sure what you are asking but it takes 1-BTU to raise 1-pound of water 1-degree Fahrenheit.

          Mark
          at sea level

          rick.
          phoebe it is

          Comment


          • #6
            Re: Chart Help?

            I bet Wrenchspinner has a formula for that?

            Comment


            • #7
              Re: Chart Help?

              Originally posted by Plumbus View Post
              I bet Wrenchspinner has a formula for that?
              Where's Ritchie been anyways...Oh,that's right the newlyweds.
              Jeeze Dude,are you going to take a time out and let her breathe.
              How many times a day do you really need it.

              Comment


              • #8
                Re: Chart Help?

                Originally posted by ToUtahNow View Post
                JC,

                I'm really not sure what you are asking but it takes 1-BTU to raise 1-pound of water 1-degree Fahrenheit.

                Mark
                Maybe this will help, maybe not.

                Let's use this for theoretical givens:

                1-80 gallon water heater set at 120F
                Incoming water temperature of 65 degrees
                Tap temperature requirement of 90 degrees only. Not higher like we all might assume.

                So what would be the amount of 90 degree water that could be produced in gallons?

                What if you set the heater to 140F with a T-stat valve? How many gallons could be produced?

                My little mysteries I'm sure others have no problem with.....

                J.C.

                Comment


                • #9
                  Re: Chart Help?

                  Hmmm...I'm gonna need a six-pack of R.C. Cola and a box
                  of banana moon pies to figure this out.

                  Now turn that dang computer off and go to work!

                  Comment


                  • #10
                    Re: Chart Help?

                    BTUs are BTUs so it is really just a matter of doing the math. The missing items in your question are the BTU of the heater, is there a set time and are you using a thermostatic mixing valve?

                    Mark
                    "Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

                    I never lost a cent on the jobs I didn't get!

                    Comment


                    • #11
                      Re: Chart Help?

                      If I can recall what a Delta t is (I can't)
                      The formula is


                      ( (Gal required X Weight of the water) X Delta T )
                      __________________________________________ X 60 (Answer in mins)
                      Btu's used at the efficiency rating of the heater

                      Merry Kissmas

                      Comment

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