On Monday 30 January 2012 15:09:58 [email protected] wrote: > Dear All, > > What would be the difference we can expect in the percentage of oxygen > in the urban and rural air ( altitude remaining the same ) ?
Interesting question Rajan, my first guess was that because of wind and rates of diffusion any concentrations of pollutants and CO2 would be rapidly levelled off but I see a 2008 news report that polluted city air can drop to 15% O2 compared with the normal 21% we expect to see. Although air pressure drops with altitude it should not affect the gas volume ratios. > > I am asking this question since I found the same wood stove with the > same fuelwood performed better in a rural area compared to an urban > area ( altitude being sea level at both places ). I am not able to find > any reason except a possible difference in the oxygen percentage in the > air at the two places. Have you considered change in humidity affecting the equilibrium moisture content of the wood? 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://www.bioenergylists.org/
