2 edition of How to reduce energy consumption in kiln-drying lumber found in the catalog.
How to reduce energy consumption in kiln-drying lumber
Eugene M. Wengert
by U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory in Madison, Wis
Written in English
Also issued online.
|Statement||by E.M. Wengert.|
|Series||USDA Forest Service research note FPL -- 0228.|
|The Physical Object|
|Pagination||4 p. ; 28 cm.|
|Number of Pages||28|
Acacia mangium is a fast-growing plantation species grown in tropical areas. The diameter of the stem is small, and the proportion of the juvenile wood is large. The wood is easy to dry, but collapse and inner cracks occur easily, so a low temperature drying schedule is recommended, and more conditioning should be done, so that drying stress and plastic distortion can be reduced, and the Cited by: 3. kilns for drying lumber have been operated in Alaska (Northern Engineer ). This type of kiln could be used in drying firewood, but the cost is too high to justify its construction solely for this use. Wengert () suggested a less expensive solar kiln for drying firewood. An evenCited by: 2.
In this work, a kiln energy model was developed with the main objective of assessing energy con-sumption in industrial lumber kilns. The model simulates kiln energy consumption on the basis of a simpliﬁ ed description of kiln technologies, energy systems and lumber characteristics, and it requires aCited by: 5. The objective of the study was to reveal the effect of RF heating at different power densities and time combinations as pre-conventional kiln treatment on the drying characteristics and quality of sub-alpine fir lumber. As a consequence of this objective, the study hypothesis was formulated as: “if RF heating improves the permeability of sub-alpine fir, then upon kiln drying, final moisture Cited by: 1.
Practical kiln drying;: A manual for dry kiln operators, owners and superintendents of woodworking plants and vocational schools, [Edgar U Kettle] on *FREE* shipping on qualifying : Edgar U Kettle. Conventional way of drying is most frequently used way of drying wood because the kilns are technically very simple, even for large capacity kilns (over m 3 of timber). They do not require extra maintenance and electrical power consumption is reduced by using wood wastes as fuel for boiler.
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Effects. The energy used to kiln-dry lumber is roughly equivalent to the energy needed to heat 5 of every 1, homes and businesses.2 Fortunately, some steps can be taken to reduce the petroleum-based energy consumed in kiln-drying lumber. Let's look over some energy estimates for kiln drying that are shown in table 1.
If we. Additional Physical Format: Online version: Wengert, Eugene M. How to reduce energy consumption in kiln-drying lumber. Madison, Wis.: U.S. Dept. of Agriculture. Steam Consumption in the Kiln Drying of Western Softwoods.
Forest Products Journal 4(5): [ Links ] Elustondo, D.M.; Oliveira, L. Opportunities to Reduce Energy Consumption in Softwood Lumber Drying. Drying Technology [ Links ]Elustondo, D.M; Oliveira, L. Strategies to Reduce Energy Consumption in Kiln by: 5. Energy Consumption in Drying Systems Definition of Terms A list of symbols is provided at the end of this chapter.
Units of Thermal Energy In English notation, the unit of energy is the British thermal unit (Btu), which is defined as the amount of energy required to heat 1 lb of liquid water 1 °F at 40 °F. Because the quantity of energy used.
This is expressed in kg kW −1 h −1 as the amount of water evaporated divided by energy used. Ananias et al.  found fan power consumption from 30 to kWh m −3 when applying accelerated.
Opportunities to Reduce Energy Consumption in Softwood Lumber Drying Article in Drying Technology 24(5) June with 27 Reads How we measure 'reads'.
The calculation of drying costs involves first the calculation of energy consumption INTRODUCTION (cont’) Kiln drying is a very demanding energy process 6 Balsam fir drying from % to 15%: MBF, 2’’x4’’x8’ 56 kg H 2O → kWh/kg H 2O 61 kWh ( millions BTU) 1-year bungalow consumption: millions BTU N.B.
1 kWh. At present, no single book adequately covers a basic understanding of wood book satisfies the need for such a work. It describes drying in practice. This the fundamental basis of kiln-drying technology, to enable forest companies to imFrove their drying operations as high-quality timbers become scarcer and of yesteryear can no longer be by: "This book describes the fundamental basis of kiln-drying technology, enabling forest companies to improve their drying operations as high-quality timbers become scarcer and former wasteful practices can no longer be tolerated.
It covers wood structure, moisture in wood, moisture movement and stress development on kiln-seasoning lumber boards. The lumber is dried to 30% moisture content, and then placed in a kiln for final drying.
Though predryers cost about the same to build as kilns when you compare costs on the basis of your annual production, they require extra handling of the lumber, and they actually cost more to run than dry Air Drying Kiln Drying. system other than moisture added by the drying lumber.
This method of drying is most popular for oak and other hard to dry species. Low Temperature Dehumidification Drying Dehumidification drying is a form of kiln drying. With a dehumidifier, moisture is removed from the dryer by condensing the moisture on cold coils.
When the water condenses File Size: KB. to saving energy in commercial lumber drying processes. Objectives 1. To develop a reliable experimental apparatus and pro-cedure for the continuous quantification of energy consumption in the experimental kiln drying of lumber. To dry a hardwood lumber species according to the recommended FPL schedule and relate the energy consumed.
heat energy consumption is much reduced from that used by conven-tional and high temperature drying. To conserve energy in kiln drying it is, therefore, apparent that one must dry at as high a wet-bulb temperature as possible.
In the above analysis it is apparent that the largest amount of energy is used to evaporate the moisture from the lumber. values at the beginning of kiln-drying, to soften the wood surface again. The total specific energy consumption during conventional kiln drying is evaluated at kWh/m3 or kWh/ [3, 10].
When drying pre-dried lumber (from 30% initial MC), the energy consumption may be reduced to half. Dehumidification by condensation. Wellons has developed the most significant advance in lumber drying of the last 50 years – Computerized Multizone Control.
Our multizone, computer controlled lumber dry kilns have demonstrated improvements in moisture content uniformity. Better grade recovery, faster schedules, reduced energy consumption and increased drying efficiency. energy content in the air would rise quickly due to the moisture. This leads to the conclusion that the high humidity results in air with a high energy content.
As we try to heat up lumber inside a dry kiln high humidity is a desirable result we wish to achieve. The high File Size: KB.
ESTIMATING HEAT CONSUMPTION IN KILN DRYING LUMBER x James E. Shottafer and Craig E. Shuler INTRODUCTION With increasing emphasis on the cost and availability of energy, the heat consumed in the kiln drying of lumber has become a point of immediate interest to the wood con version industries.
The use of green, or undried lumber. The title of this thesis is “Efficient Kiln Drying of Quality Softwood Timber”. The following discussion will break this title down to what it really means and provide a context for the thesis.
Timber is a name given to wood that has been prepared for the purpose of building or carpentry (Robinson and Davidson, ). Kiln Drying Lumber - Duration: Out of the Wo views.
DIY wood kiln. Everything you need to know to dry your own wood. FarmCraft - Duration: Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method.
There are two main reasons for drying wood: Woodworking When wood is used as a construction material, whether as a structural support in a building. courses of lumber to be wetter than the balance of the stack. Result is excessive degrade in the kiln.
The bottom 3 courses equal 3% of a stack of lumber; if ~ is lost, that is 1~% of the affected area. If the area involves 20 stacks of lumber, that is (X3} 60 courses of lumber or at an average ofFile Size: 1MB.Small scale vacuum lumber drier, TB Fladerer GmbH, Austria Economics of drying Lumber drying should be a money making operation.
The best way to make money is to produce the best quality lumber possible. Time spent during drying, the usage of energy, labor costs, and other material expenses are all small compared to the costs generated by bad File Size: 2MB.Air-drying your own stock can save you at least 50 percent over kiln-dried boards from your lumber retailer.
But, doing it yourself does require time, effort, know-how, and the room for stacking and storing. To help you avoid the mistakes that result in firewood, we contacted an experienced, hands-on expert.