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fuel cost

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

Comments

  • Zman
    Zman Member Posts: 7,117
    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
    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
    HEATON Member Posts: 117
    thanks
  • Jamie Hall
    Jamie Hall Member Posts: 17,760
    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