Corrugated veneer panel thermophysical properties

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Abstract

The article substantiates the need to develop new mechanisms for the hardwood use in modern conditions of Republic of Karelia timber industry. One of the potential uses of birch wood in wooden house construction is building materials production from veneer and slab materials based on it. A large amount of associated waste from processing birch wood into veneer stands out as one of the key problems. A new slab joinery and construction material made of corrugated birch veneer is considered. The purpose of this study is to evaluate the thermophysical properties of a corrugated board made of birch wood. To achieve this goal, the tasks and methods of research are defined. An experimental device has been developed to conduct an experiment to determine the values of thermophysical characteristics. DS18B20 temperature sensors were used to measure the surface temperature, as well as to monitor device operation and the room air temperature. The sensors are connected to the Arduino microcontroller platform, which was used to record and transmit sensor readings. Additionally, the course of the experiment was monitored using a thermal imager Testo 875-1i. During the experiment, more than 1000 measurements were carried out. As a result of data processing, a diagram of the dependence of the density of the heat flux passing through the sample on time, as well as diagrams of the dependence of thermal conductivity and thermal resistance on the temperature difference on the sample surfaces, was obtained. The diagrams show the regression dependences of changes in heat flux density, thermal conductivity and thermal resistance during measurements. The values of the heat flux density, thermal conductivity coefficient and thermal resistance calculated on the basis of regression equations and the values obtained experimentally are determined. The directions of further research of the material under consideration are determined.

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About the authors

O. N. Galaktionov

State Architectural and Construction University

Author for correspondence.
Email: ong66@mail.ru

Doctor of Sciences (Engineering) 

Russian Federation, 33, Lenin Street, Petrozavodsk, 185910

Yu. V. Suhanov

State Architectural and Construction University

Email: yurii_ptz@bk.ru

Candidate of Sciences (Engineering)

Russian Federation, 33, Lenin Street, Petrozavodsk, 185910

A. S. Vasilyev

State Architectural and Construction University

Email: alvas@petrsu.ru

Candidate of Sciences (Engineering) 

Russian Federation, 33, Lenin Street, Petrozavodsk, 185910

A. A. Kuzmenkov

State Architectural and Construction University

Email: akka1977@bk.ru

Candidate of Sciences (Economy)

Russian Federation, 33, Lenin Street, Petrozavodsk, 185910

References

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2. Fig. 1. Plate material Corrugated veneer panel: 1, 2 – flat outer veneer layers; 3, 4 – end faces of the panel on the side of the ridge; 5 – ridge; 6, 7 – end faces of the panel from the groove side; 8 – groove; 9 – place of gluing of internal corrugated veneer sheets; 10, 11 – internal corrugated veneer sheets laid with a cross arrangement of waves in adjacent layers

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3. Fig. 2. General view of the considered samples of the corrugated panel

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4. Fig. 3. Corrugation of panel elements using aluminum pipes: corrugation of veneer sheets of the panel inner layer (top); formation of «spike-groove» connection elements on the panel outer and inner sheets (bottom)

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5. Fig. 4. The laboratory installation scheme: 1 – computer; 2 – Arduino microcontroller platform; 3 – ambient temperature sensors; 4 – body; 5 – the test sample of the material; 6 – temperature sensors of the external surface of the sample; 7 – sensors of the inner surface of the sample; 8 – temperature sensors of the side walls of the body; 9 – heating element

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6. Fig. 5. General view of the experimental device

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7. Fig. 6. Fixation of readings with a thermal imager

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8. Fig. 7. Experimental and calculated heat transfer coefficient

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9. Fig. 8. Average thermal resistance of samples experimental and calculated

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10. Fig. 9. Density of stationary heat flux through the surface of samples experimental and calculated

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