fuel cost

HEATON

What is a good program for fuel cost analysis

pecmsg

http://nepacrossroads.com/fuel-comparison-calculator.php

Zman

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.

HEATON

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

thanks

Jamie Hall

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.