Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Heat Loss

  1. Dec 29, 2008 #1
    The problem is designing a solar water heater system to keep a 4500 gal tank of water at 140F during the day.

    The tank in question has the following properties:

    5000gal Volume
    4500gal water
    It loses about 1.8 degrees F/hr if not heated.

    I first need to figure out amount of energy needed to maintain temps.

    I did this using the following math:

    4500gal of solution times 8.3 lbs/gal of water = 37350lbs of solution

    37350 * 1.8 = 67,230 BTU/h of energy needed.

    Seems pretty straight forward so far??? (Math Errors?)

    How do I go about finding out how much collector area and efficiency of solar collectors and heat transfer?
  2. jcsd
  3. Jan 8, 2009 #2


    User Avatar

    Staff: Mentor

    I googled solar water heater calculator, and got lots of good hits. Here's one of the first ones:


    You can use a similar google search to find other calculators if that one isn't exactly what you are looking for.

    Welcome to the PF, BTW!
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Heat Loss
  1. A room's heat loss (Replies: 1)

  2. Heat loss from a pool (Replies: 10)

  3. Measuring heat loss (Replies: 4)