heat loss by water heater

The Tank heat loss by water heater

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  • #12278
    philbob57
    Participant

    Assuming a new 50 gallon water heater of .92 efficiency with thermostat set to keep water at 130 degrees F, no heat trap, if the circuit breaker trips just after a shower, about how long will it take for the water temperature drop to, say, 90 degrees F?

    Thanks.

    Phil

    #12284
    Randy Schuyler
    Keymaster

    There is also the question of temperature outside the tank, and how much exposed piping above the tank to radiate heat away. I don’t have a clue myself. I’ll be curious to see if anyone else can postulate any sort of an answer.

    Randy Schuyler

    #12287
    Larry Weingarten
    Participant

    Hello: A researcher in hot water and very good guy, Jim Lutz developed a tool for figuring out the energy usage around water heaters called WHAM, “Water Heater Analysis Model”. Here is a link to an article about it that will point you in the right direction.
    http://www.homeenergy.org/archive/hem.dis.anl.gov/eehem/99/990707.html

    Yours, Larry

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