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COST Action E15 „Advances in the Drying of Wood) European inquiry about "Problems Related to Timber Drying" 1) The following answers reflect my views as a: • Kilnuser • Supplierofequipment fj Userofkilndriedtimber [~JResearcher/Teacher 2) M y answers relate to: [~1 Softwood only [~J Hardwood only If you dry/use softwood and hardwood, please fill out 2 forms! 3) Please rate all the following problem areas (add problems, if necessary)! (5 = very, 1 = not important) Main area Product Problem Checking beforelawing Checking during air drying Checking during kiln drying Surface checking End checking Internal checking Checks in knots, loose knots Collapse Final MC too high or too low Spread of MC in kiln load / consignment MC gradient in individual pieces Case-hardening Resin flow Deformations (twist, bow, spring, cupping, etc.) Discoloration (temperature-caused) Discoloration (fungal-, chemical-caused) Sticker marks Drying schedule optimisation (species, timber dimension) Energy consumption (thermal) Energy consumption (electricity) Drying of chemically treated timber Spraying / steaming equipment Air flow (too low, uneven) Corrosion Maintenance of kiln (walls, doors, tightness, heat exchangers, etc.) Selection of drying principle (heat and vent, vacuum, heat pump) Selection of appropriate kiln layout (batch, continuous, size, etc.) Kiln control unit Operation of kiln control unit Maintenance of measuring equipment MC measurements Quality control before drying Quality control during drying Quality control after drying Too little know-how among kiln operators Too little know-how among sales personnel Too little know-how among distributors/agents Too little know-how among customers (users of dried timber) Whom to contact for trouble-shooting Confusing drying quality specification in contracts/standards Change of MC after drying, but before delivery Change of MC during transport and (distribution) storage 5 4 3 2 1 Drying process Kiln control Know-how Sales/purchasingPDF Image | KILN DRYING PROBLEMS AND ISSUES IN CANADA
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