On Monday 02 August 2010 01:31:17 Crispin Pemberton-Pigott wrote: > The problem with that is that the efficiency would rise to the point > that the exit temperature would be well below the point at which H2S > would condense and eat the pipes.
Cooling flue gases below their dew point is something to be avoided with wood burning stoves, even stainless steel flues will fail in an condensed acid environment because the acids attack the chrome oxide layer wjich cannot reform in the absence of oxygen. It's not H2S that's the problem as little of that will survive the fire, hydrogen sulphide is a fuel gas, it's the fact that it forms SO2 and water which when condensed in the flue produces sulphurous acid. <snip> > Insulating the gers > (yurts) is very effective however it also raises the CO because the > stoves are leaky. Most stoves are leaky but the draught in the chimney would normally be enough to vent the CO and suck air into the stove.. The problem arises when the room is so well sealed that outside pressure of colder air exceeds that indoors. a local family lost a son in 1940s when his platoon were billeted in a French barn with a pot belly stove as their only source of heat. They had draughtproofed the barn so well it inhibited the circulation and they were found dead next day. AJH _______________________________________________ Stoves mailing list [email protected] http://listserv.repp.org/mailman/listinfo/stoves_listserv.repp.org http://stoves.bioenergylists.org http://info.bioenergylists.org
