[Default] On Fri, 23 Aug 2013 16:45:13 +0530,Rajan Philip <[email protected]> wrote:
>It has been my observation that fire-wood in wood stoves burn better in >villages compared to cities and towns. Probably because the oxygen content >in village air is slightly more than city/town air. We had a thread about this some while back and yes it seems the local oxygen content in a big city can drop as low as 13% from the global average of 21%. I think we need at least 7% in order to get enough oxygen into the body and water vapour and CO2 out. Petrol engines are quite efficient at depleting oxygen from around them and pumping 13% CO2 out, probably because petrol/gasoline is easily burned. I would expect a wood fire to have problems burning before a petrol engine. I don't intend to visit a city with large numbers of vehicles to test this idea. Incidentally when one blows on a fire to fan the embers into a flame you are still blowing about 18% oxygen along with the water vapour and CO2 you exhale in normal conditions. AJH _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://stoves.bioenergylists.org/
