[Stoves] SEET Lab in Ulaanbaatar running again in its new home

[Frank Shields]

Dear Crispin,

50 grams per cu meter is a lot of stuff. I wonder what a cigarette is? 

So all the heat that goes in the room is 'good' heat and that leaving the
room is lost heat to do the calculations? Is the height where the
inside-outside heat standard or site specific? 

 

The compressor taking in CO2 free air is making the dilution? What is used
to scrub the CO2 from the air? The CO2 produced is measured real time(?)
using IR detection? 

 

If CO2 is produced at varying concentrations as the fuel combusts how is it
used as a measure of air dilution? 

 

Thanks

 

Frank

 

 

Thanks 

 

Frank Shields

 

BioChar Division

Control Laboratories, Inc. 

42 Hangar Way

Watsonville, CE  95076

 

(831) 724-5422 tel

(81) 724-3188 fax

 <mailto:frank at biocharlab.com> frank at biocharlab.com

www.controllabs.com

 

 

 

 

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Crispin Pemberton-Pigott
Sent: Monday, June 03, 2013 11:25 AM
To: 'Discussion of biomass cooking stoves'
Subject: Re: [Stoves] SEET Lab in Ulaanbaatar running again in its new home

 

Dear Frank

 

Thanks. The burn room is a bit small (the stoves run up to 30 kW) but the
instrument room is large. We often have a lot of visitors so 20 people can
easily fit in the room to see the whiteboards.

 

The stoves all have chimneys so a gas sample is drawn from the chimney. The
temperature at the height at which the chimney exits the living space (the
'heated envelope') is recorded to calculate the thermal efficiency of the
system as a whole.

 

A hood can be used with small stoves (which are thought of as 'picnic
stoves'!)  connected to the chimney which is what is done at the SeTAR
Centre.

 

There are several humming motors and the compressor and CO2 adsorber is not
in the same room (noisy). You can see the diluter stuck into the lower end
of the chimney. This is fed dry air that reduces the copious moisture level
to something that will not condense. We don't want to measure 'fog' as
'particles'. The dilution is variable at the touch of a needle valve. The
dilution is monitored by tracking the level of CO2 in the stack and diluter
- a good suggestion made by Tami Bond some year ago. 

 

Last week we managed to measure smoke that reached 50 grams per cubic metre
of air (undiluted), far beyond our previous record of 17. Fifty million
micrograms is a heck of a snort for a lab to deal with. We are looking at
ways to reduce the amount of moisture and volatile vapours in the while
system. If we can get it out early, it makes everything last a heck of a lot
longer.

 

Regards

Crispin

 

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