Lower Explosive limit 1

[rivi]

Hi

Does any one know the formula for calculating the lower explosive limit effect of temperature together with units involved.
I am doing this for a forced draft burner and need to know what the effect would be on start up after a trip with the elevated temperature

 

[Guidoo]

See thread283-99596

 

[jppmj]

The LEL temperature dependancy is really empirical.
If the actual temperature dependancy is unknown the following formula can be used :
LEL (t°C) = LEL (20°C)x (1-0.0014(t-20))x 293/(273+t)
LEL in g/m3
T in °C

Source : European Standard Pr EN 12753

 

[bonzoboy]

The best resource for explosion limit information is the old Bureau of Mines Bulletin No. 680 (by Joseph M Kuchta) "Investigation of Fire and Explosion Accidents in the Chemical, Mining, and Fuel-Related Industries-A Manual"
Great source of information, data, etc.