1 reply to this topic

[gunjan]

HELLO

Well I wanted to know that whether there is any variation of calorific value with respect to temperature. The plant in which i am working is having a burner system in which we are using an Mixed gas of CO, H2, H2O with calorific value of around 3000 KCal/NCM. And we preferred to have a lower temperature of fuel to have a better burning efficiency. I dont understand why it is so ? is there any variation lowering the temperature with burner efficiency ?
Or is there any variation of calorific value by reducing the temperature ?
SO some veteran Engineers please throw some light on this!!!

Thanking You...

Regards...
Gunjan

[engware]

Hi Gunjan:

Let me try to help you with your question.

In thermodynamics, HHV value is calculated for the temperature value of 298 K or 77 F. Therefore, HHV is independent of the temperature values -- the calculation is done for a single temperature value.

Here are two URLs for free HTML and XLS files that will help you with HHV values for different fuel compositions for oil, coal and gas type fuels:
http://members.aol.com/engware/calc4.htm
http://members.aol.com/engware/modeling-12.xls

If you need more information on HHV, physical properties, stoichiometry, flame temperature, combustion gas composition etc. -- slide shows, online calculators, engineering modeling, demos etc. -- check out the following URL: http://members.aol.com/engware/free.

Thanks,

Gordan