Hi.
We have implemented some efficiency project on steam cracking furnace and I have to evaluate how much fuel consumption was reduced. At the begining I created below formula for comparison situation before and after implementation:
Fuel consumption coeficient [GJ/t of feed] = (Heating value of Fuel Gas [GJ/t]*Fuel consumption [t/h])/amount of the feed [t/h]
But now I see that I should take into account also ambient temperature, feed temperature, fuel gas temperature and amount of combustion air. It is not a problem to evaluate amount of the heat provided to the furnace with these streams, but I have no idea how to incorporate this values into my formula to compare the situation before and after implementation. I would appreciate if someone could give me some advices ho to do that.
Best Regards