[Stoves] Testing gases from stoves

[Frank Shields]

Dear Crispin and Stovers,

 

I found this to be an interesting report (attached) . I have been looking for a system that would test the combustion gases of interest – and helium.  And I found it!  It think this system (ion trap mass spectrometer or quadrupole mass spectrometer) may be what’s in Crispin’s hand held tester(?).  I think it may teat for helium but, perhaps, is just not set up to do it because  ‘Who would want to test helium along with combustion gases?’ – We Would!

This could make testing gases much more accurate and easier.  How I suggest it working is as follows:

We pipe in helium at ~ 0.5L/minute into the stove at fuel level in a known and steady rate during the combustion experiment.  So we know the total carbon in the stove from the added fuel and the constant rate helium is leaving the stack.  We monitor the CO, CO2, H, O2 produced during the experiment and determine their concentrations. The volatile carbon not determined will be tars and other unburned carbon.

The calculations are: (combustion components) per (helium detected). 

This makes it such we do not care about dilution of primary or secondary air. We can make adjustments to them during the experiment and it will not make a difference.  We only need to make sure we have complete mixing where we pull out the gas sample for testing.  The helium is called a Surrogate Standard and knowing that every minute there is 0.5 liters leaving the stack no matter how diluted or how fast it leaves makes that a solid unit of measure we can ratio the components of interest off. We only need to have the makers of combustion measuring device add helium to the other components of interest and we add helium to the front end of the experiment at a steady known rate. 

 

Regards

 

Frank

 

Frank Shields
franke at cruzio.com


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