[Stoves] Wood fired, two-stage gasification employed

[Crispin Pemberton-Pigott]

Dear Kevin

 

Picking up on one point for your response:

 

> Accordingly, I would think that unless there is a specific Standard that 

specifies the O2 level at which the CO is measured, two different stoves or 

furnaces reporting the same CO levels could have very different O2 and Smoke


Spot Readings.

 

There is a difference in understanding here. It is not that the dilution
level is set and then measurements taken, it is just a reporting method so
that measurements taken with different levels of dilution can be fairly
judged.

 

If you recall there was a conversation some time ago here, I think it was
about the time you joined the stove list, about measuring CO using a CO
meter and it was found by some that they have 'reduced CO'. In fact the
excess air might have been increased, not the CO reduced. As the reporting
method was 'CO in ppm' it told us nothing about the actual CO being
produced. Things have come a long way since then in stove testing in most
quarters.

 

A couple of years ago I was asked to test a new 'coal briquette' which
claimed to have not only 'reduced CO' but also 'reduced CO2'. That I just
had to see! So it turns out they had taken the product to an air quality
testing lab and the guy testing it measured the absolute concentrations of
CO and CO2 in the air above the product when it was burning, as well as a
small pile of coal. The briquette had higher excess air so he reported that
it had 'significantly lower CO2 output'. As some people now believe that CO2
is a 'pollutant' along with the well-known CO, they were claiming a dramatic
reduction because their coal didn't produce much CO2. The mind boggles. 

 

The method you describe to get the minimum smoke from an oil burner is a
test of the burner, not the fuel, as you can imagine. The idea is sound. I
wonder if the nanoparticle count can somehow be assessed.

 

Great paper from Philip Hopke from Clarkson Univ. Some of you will remember
him from the Bangkok roadmap conference: 

http://www.nyserda.org/publications/10_15_eval_energy_emissions_performance.
pdf

 

The future is small, very small!

 

Regards

Crispin

 

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