Dear James and Jim At the SEET Lab in Ulanbaatar we are also using freezing for preserve moisture content of coal and wood. You guys at SeTAR Centre are luck in that you have a proper wood drying oven so you can do individual tests before and afterwards really easily.
We get a batch - about two tons - and keep in in a container outside where it is typically -20. The fuel is rated in a separate lab (WWB) and we record it. Homogenising to a particular level is best done in a conditioning cabinet which is saturated inside, and kept at a constant temperature. The combination of a given humidity level (100%) in the air and temperature gives a nearly constant % WWB level in the fuel. This does not work so well for coal so the tests are relative to each other and we use a moisture level that is at least typical. This year we are at 26.1% and will probably not run out before spring. Variations between sources is more significant that between 20% and 26% moisture because the chemistry is so different. I think there is an old message from Tom Miles on this list (see archives) giving the method for getting wood to a given % moisture content. Regards Crispin _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address Stoves mailing list 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/ [email protected] http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
