[Stoves] Combustion gas analysers

[Marc Pare]

For instructions on how to use the output numbers from a combustion
analyser and how to make basic calculations please see the Boiling Point
article at
http://www.hedon.info/BP55_SoYouFinallyBoughtACombustionAnalyser?bl=y

which also has a photograph of two different analysers. The formatting is
not as easy to read as the original article but it is all there.

**

Attached is the nice pdf of the aforementioned article. So useful!

Marc Paré
B.S. Mechanical Engineering
Georgia Institute of Technology | Université de Technologie de Compiègne

my cv, etc. | http://notwandering.com


On Wed, Sep 19, 2012 at 9:59 PM, Crispin Pemberton-Pigott <
crispinpigott at gmail.com> wrote:

> Dear Gas Measuring Friends****
>
> ** **
>
> I have been looking at combustion analysers (again) and discovered that my
> almost favourite portable machine, the TSI CA-6302 is no longer in
> production. Goodbye to a friend….****
>
> ** **
>
> There is a company Unigas which makes a ragne of machines that have
> stepped into the same space at a similar price, but with one basic unit
> that is quite a bit cheaper. So I am forwarding the information in case you
> are considering evaluating your stove performance. These units are
> necessary if you want to develop a very low emission stove.****
>
> ** **
>
> http://www.topac.com/e8500gasanalyzer.html is a top end unit that
> competes favourably with a Testo 350/454 at about ½ the price. I contacted
> Topac, just one of many vendors. In Canada one vendor is E&E Process in NW
> Toronto.****
>
> ** **
>
> As there are only about 3 manufacturers of the cells that go into these
> machines you can expect the cost of adding a cell to be about the same,
> whoever makes it. A Testo 350 has many features that are not needed for an
> stove experimenter, but just to let you know, Tom Miles uses one, and so do
> I when I have a chance! There are two at the SeTAR Centre for field work.
> But they are seriously expensive.****
>
> ** **
>
> From Unigas you can get an 1100 series http://www.topac.com/gas_flue.html  which is the basic unit - $1500. It will measure O2 and CO and calculate
> the CO2, and Excess Air level. That is the lest you need to know to be able
> to work out what your CO(EF) values are. That means (EA+100%) x CO reading.
> Also called ‘the undiluted CO level’. The TSI reported this directly but
> most do not. The usefulness of this figure is that you can make direct
> comparisons between different stoves or different burns on the same stove
> to know which is performing better.****
>
> ** **
>
> Above the 1100 is a 2200 with an extra cell, and a 4400 with either 3 or 4
> more cells. The cost runs up to $4500.****
>
> ** **
>
> The 8500 series has, for $10k, an NDIR CO2 cell, NDIR CxHy (hydrocarbons)
> and electrochemical NO, SO2 and H2S. I have enquired as to whether there is
> a Hydrogen measurement missing because the CO cell pretty much has to be H2
> compensated (being very reactive) but it is not on the brochure as a
> reported gas. Odd.****
>
> ** **
>
> So many cool toys for stovers are emerging. Even the basic units above a
> printer built in and can stove 600 sets of readings. The expensive ones
> communicate in real time with a laptop via Bluetooth and there is even a
> wireless printer. ****
>
> ** **
>
> Recurrent cost: combustion analysers have running costs. The O2 cells die
> over time whether or not you use them, and so do the CO cells. But, if you
> are earning any reasonably amount of money from developing and making
> stoves, you really need to cover this as part of your ‘professional’ work.
> It is very difficult to guess how a stove is working or if a small change
> in it was a help or a hindrance.****
>
> ** **
>
> For instructions on how to use the output numbers from a combustion
> analyser and how to make basic calculations please see the Boiling Point
> article at
> http://www.hedon.info/BP55_SoYouFinallyBoughtACombustionAnalyser?bl=y ****
>
> which also has a photograph of two different analysers. The formatting is
> not as easy to read as the original article but it is all there.****
>
> ** **
>
> Regards****
>
> Crispin****
>
> ** **
>
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