<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><p class="MsoNormal"></p><p class="MsoNormal"><br class=""></p><p class="MsoNormal">Dear Crispin and Stovers,</p>
<p class="MsoNormal"><o:p class=""> </o:p></p>
<p class="MsoNormal">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! <o:p class=""></o:p></p>
<p class="MsoNormal">This could make testing gases much more accurate and easier.
How I suggest it working is as follows:<o:p class=""></o:p></p>
<p class="MsoNormal">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.</p>
<p class="MsoNormal">The calculations are: (combustion components) per (helium
detected). </p>
<p class="MsoNormal">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. <o:p class=""></o:p></p>
<p class="MsoNormal"><o:p class=""> </o:p></p>
<p class="MsoNormal">Regards<o:p class=""></o:p></p>
<p class="MsoNormal"><o:p class=""> </o:p></p>
<p class="MsoNormal">Frank<o:p class=""></o:p></p>
<p class="MsoNormal"><o:p class=""> </o:p></p>
<!--EndFragment-->Frank Shields<br class=""><div apple-content-edited="true" class=""><a href="mailto:franke@cruzio.com" class="">franke@cruzio.com</a><br class=""><br class="">
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