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  1. #1

    How to calculate cost for a gal of chilled water

    Does anyone know how to calculate the cost for a gal of chilled water?

  2. #2
    Join Date
    May 2008
    Location
    Central Pennsylvania
    Posts
    440
    Well I'm thinkin' that would depend on what chiller you're using??? Different machines will have a different kw per ton rating. If you knew the kw per ton and the size of the chiller, you should be able to do a bunch of reverse math and get a guesstimit of the cost per gallon.

  3. #3
    Join Date
    Mar 2003
    Posts
    7,321
    actually, you need to figure all power including pumps and cooling tower, then do the math. lets say a total central plant might be 1.3 kw/ton these days, and you are using 2.2 gpm/ton. you can now get to the math. unless you really want a good number, then you need to figure costs for winter work, repairs, and depreciation, as well as operations.

  4. #4
    Join Date
    May 2008
    Location
    Central Pennsylvania
    Posts
    440
    Quote Originally Posted by flange View Post
    actually, you need to figure all power including pumps and cooling tower, then do the math. lets say a total central plant might be 1.3 kw/ton these days, and you are using 2.2 gpm/ton. you can now get to the math. unless you really want a good number, then you need to figure costs for winter work, repairs, and depreciation, as well as operations.
    Good point Flange, I wasn't even thinking about the ancillary equipment for some reason, brain fart!

  5. #5
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,266

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