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fuel cost

HEATON Member Posts: 117
What is a good program for fuel cost analysis


  • Zman
    Zman Member Posts: 7,446
    I like the attached spread sheet. It does not rely on a website and allows you to adjust more variables. Natural gas for example is has a lower energy value at altitude you need to be able to change the value.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
    HEATON Member Posts: 117
    thanks for the input. I still need some formula for the cost of a CFM
    of air at the various ambient temp and temp rise and temp drop at the various rates?? thanks again
    HEATON Member Posts: 117
  • Jamie Hall
    Jamie Hall Member Posts: 21,105
    At normal room temperatures the heat capacity of air is approximately 0.24 BTU/lb F. The density is about .00234 slugs/cuft. Given those two numbers you can easily compute the required heating rate -- in, say, BTUh -- for any delta T (in Fahrenheit) and air flow rate in, say, CFM.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England