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btu's?

ALH_4
ALH_4 Member Posts: 1,790
One Btu is the amount of heat required to raise 1lbm of water from 59.5F to 60.5F.

The SI calorie is defined as the amount of heat required to raise 1 gram of water from 14.5C to 15.5C.

I guess the answer is that these base units were chosen fairly arbitrarily as a way to measure heat and heat transfer.

-Andrew

Comments

  • Jason_19
    Jason_19 Member Posts: 17


    hello, i am seeking information on what a btu actually is and any info on it. i know how to size boilers based on btu's n stuff but dont know why we use btu's and how we do. any info is greatly appreciated thanks
  • STEVEN MARKS
    STEVEN MARKS Member Posts: 154


    btu=british thermal unit - a measurement of heat
    a btu isthe amount of heat required to raise 1 lb of water 1 degree f
  • I was told...

    that it was the invention of two english men, both scientist. They determined, during one of their many beer drinking bashes, that the unit of measure they had discovered was the amount of energy required to raise one PINT of their beer one degree F. Oddly enough, a pint weighs in at about a pound...

    And I believe it goes on to say something to the effect, "at 76 degrees room temperature" or some such.

    Isn't European beer typically drank warm???
    ;-)

    ME
  • Gordy
    Gordy Member Posts: 9,546
    Warm Beer

    Yes warm by our American standards. Warm beer= bigger buzz for the buck. Or Euro. Could not bring myself to it on a hot summer day.

    My uncle visited from Italy. We discussed nationalized health care system over there. The government does not allow restaurants to served iced beverages, claim is that it creates problems with the digestive system.....Could explain why my Golden yaks when he devours an ice cube or snow.

    Gordy
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,610
    The person who coined the term

    was Thomas Tredgold. At first, it was the amount of heat it took to raise a cubic foot of water one degree Fahrenheit.

    Mr. Tredgold in the Library

    It pays to wander off the Wall.
    Retired and loving it.
  • Weezbo
    Weezbo Member Posts: 6,232
    it is not right to answer a question with a ? buh may i ask you

    What is a calorie and what is a joule? how we use a BTU is determined by our awareness of the conversion and expenditure of energy.

    or,Not. ***~/:)

    if i burn up 500 BTU,s perhour chopping fire wood,and the chainsaw burns up a gallon of gasoline and also a quart of # 10W oil,the chain breaks ,i twist my ankle packing wood out and i go home hungry as heck after a 10 hr day, how Free is fire wood? this is what you gotta ask yourself :)
  • Weezbo
    Weezbo Member Posts: 6,232
    Dan *~/:)

    Mr Tredgold just says things different :)

    that was a very cool read :)
This discussion has been closed.