Thermal Conductivity of Wood-Based Cellular Structures
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2020, Vol 10, Issue 1
Abstract
A physical model is developed for heating a set of laminated cellular structure formed from peeled veneer, dependences for determining its thermal conductivity under conditions of non-stationary heat transfer are proposed. It was found that for a package of 11 layers of birch veneer 2 mm thick, the thermal diffusivity is 1.93∙10–6 m2/s. Based on the fundamental theory of thermal conductivity of the wood substance, dependencies are obtained for calculating the duration of bonding of heat-insulating materials of a cellular structure. It has been established that the duration of gluing of a 22 mm thick plywood mesh slab of peeled birch veneer under pressure exposure is 14.5 minutes at a temperature of press plates 110 °C. The thermotechnical characteristics of the new wood-based cellular structure material were determined: the thermal conductivity coefficient of a cellular plywood board with a density of 530 kg/m3 was 0.081 W/(m·K), the strength under static bending of the board parallel to the fibers of the outer layers was 14 MPa, and perpendicular to the fibers was 10 MPa. The use of underutilized soft broadleaved species with low operational properties as a heat-insulating material, where high strength indicators are not required, is justified, since its thermal conductivity is two times lower than that of a similar material – solid plywood board.
Authors and Affiliations
A. A. Lukash, N. P. Lukutsova
Keywords
Related Articles
- EP ID EP683253
- DOI 10.37482/0536-1036-2020-1-146-153
- Views 529
- Downloads 0
Influence of Growth Stimulants on Seed Germination and Seedlings Growth of Scots Pine (Pinus sylvestris L.)
Scots pine (Pinus sylvestris L.) is a potential introduced plant that can be used for reforestation in the southern part of Primorsky Krai. This plant is valuable for water regulation and mountain strengthening. It is wi...
Assessment of the Development Potential of Forestry Enterprises of the Republic of Bashkortostan
The high level of power supply and technical provision of logging, along with advanced technologies, ensure the enterpriseâs competitiveness. The current state of facilities and resources at forestry institutions in th...
Navigation and Piloting System of Unmanned Aerial Vehicle for Forest Fire Monitoring
Forest fires are a common natural disaster all over the world. A great number of fires occur annually in the forest ecosystems of the European North of Russia for natural reasons and as a result of anthropogenic impacts....
Substantiation of the Technology of Mechanized Clear-Cutting of Reservoir Beds and Equipment Arrangement for Its Implementation
The issue of cleaning reservoir beds during the construction of cascades of hydroelectric power plants is relevant. In current practice, forest clearance is carried out in the form of clear-cutting 15–20 years before the...
Reproductive Indicators of Nasczokinâs Lime (Tilia nasczokinii Stepanov)
Tilia nasczokinii Stepanov (Naszokinâs lime) is endemic to the south of the Krasnoyarsk Territory and is of relict origin. Two of its populations grow in the vicinity of Krasnoyarsk on the left and right banks of the Y...