Hi Ron, I wonder if anyone has access to the thesis mentioned here: http://alcor.concordia.ca/~raojw/crd/reference/reference001180.html and this: http://theses.lub.lu.se/postgrad/search.tkl?field_query1=pubid&query1=tec_19 8&recordformat=display Clearly change of moisture content in wood is non linear--and greatly affected by boundary layers. Also temperature plays a role for sorption rates are retarded as temperature drops. Perhaps this is one reason a null point in a DamppChaser system may not be desireable? At 05:18 PM 3/3/2006 -0600, you wrote: > > >> "Wood with very low EMC will absorb ambient high RH very >> quickly. It's slower to dry out, and it takes higher temps and airflow to >> speed that process (read institutional conditions <g>). I can measure RH >> easier than EMC, and RH is good at predicting what will happen in the near >> and long term future." >> >> I gain from this that wood reacts very quickly on the intake and >> very slowly on the release. > >Not so. I've seen it assumed a lot of times, but have never >been able to find documentation to that effect from even a >minimally authoritative source. Both absorption and release of >moisture in wood is proportional to the difference between >wood MC and atmospheric RH%. > >Even so, keeping track of RH% readings is a very good >practical method of anticipating what the instruments' >reactions will be with the resulting MC levels, which are >lagging somewhat behind the RH% changes. > >Ron N >_______________________________________________ >caut list info: https://www.moypiano.com/resources/#archives > > >-- >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006 > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna at yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-539-0716 or 1-888-29t-uner
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