>> It's associated with any water that leaves the stove as vapour, it's >> the amount of energy that was necessary to turn the liquid water in >> the wood chemistry or water associated as free water in the wood into >> a vapour. In fact this enthalpy of vaporisation varies with >> temperature but it's around 2260kJ/kg. plus of course you have to add >> the necessary amount of heat to lift it from local boiling point to >> the exhaust temperature, I use 2.7MJ (.75kW) as a rule of thumb.
I made a significant mistake in the above, it's one I have corrected in others' posts in the past. I meant 2.7MJ is equivalent to 0.75kWh, the point being 1 kWh is a measure of energy and 1 kW is a rate of expending that energy for one hour. I tend to use kWh as it means more to people that have electricity and pay for it by the kWh. 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/
