Propanegas behaviour

[Manufacturingsupport]

Friends
I seek for a corelation between the temperature to Density and calorific value of Propane Gas. Is there a fixed chart which can indicate the increase in temperature to decrease in Propane density and other parameters? Can I find out the behaviour of Propane gas at different ambient temperatures?

If some one can forward this detail to me it would be of great help to me.

Thanks

 

[TD2K]

If you can provide some more details, I think we can give you a better answer.

What range of temperatures are you having to adjust the heating value(s) for?
What units are your heating value in? BTU/scf, BTU/lb?

Pressure also affects the density of propane. You haven't mentioned that so I assume it's not a factor but if it does vary, you need to consider it also.

Finally, what is this correction for? The required accuracy you might need would be a factor of the use, checking a burner capacity would be different than a custody transfer application for example.

 

[Manufacturingsupport]

Thanks for the reply. We are a fiber glass manufacturing unit. Propane is used as a fuel for heating the molten glass. With the onset of sever summer we are observing a rise in Excess O2 level during the day ( change from 0.9% to 1.2% ). Our observations indicate the Temp. of propane is changing during the day (from 29 degree C to 45 degree C) due to ambient temp. change. This is the time we see disturbance in our process. We are not sure but feel there is a corelation between the process performance and the Propane gas variation. We are therefore looking at the chart which will help us in finding this corelationship but were unable to get the chart. We had observed a reverse trend in Winter and therefore establishment of this corelation is very important.

As for the pressure, Yes the pressure does varry. However the propane pressure has to go through a series of step down pressure which maintains the final pressure steady.
Bullet pressure is 6 to 7 Kg/Sq. Cm, this is stepped down to 1.8-1.9 Kg/sq. cm which is further stepped down to 45 to 50 inches of water column.
The heat value of Gas 25.85 KWt Hrs/ Cu. Mt. The calorific Value is around 11000 Kcal.
Hope this helps.

 

[25362]

For propane gas thermophysical properties try:

http://webbook.nist.gov/cgi/fluid.cgi?ID=C74986&Action=Page