Increasing the Energy Efficiency of the Process of Oscillating Vacuum-Conductive Drying of Wood by Means of a Heat Pump

Сафин, Р. Р.; Хасаншин, Р. Р.; Khakimzyanov, I.F.; Mukhametzyanov, Shamil; Кайнов, П А

doi:10.1007/s10891-017-1569-y

Cited by 10 publications

(5 citation statements)

References 5 publications

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“…Depending on the plan of the experiment, ozone treatment was carried out for room-dry wood materials, as well as for thermally-modifiedsamples. Thermal modification of the samples was carried out in the temperature range 180-240 ° C by the contact method on an experimental setup [15].…”

Section: Methodsmentioning

confidence: 99%

Modification of the surface of thermally modified wood with ozone when creating glued structures

et al. 2021

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The greatest interest of researchers is focused on the processes of heat treatment of wood, taking place in an airless environment at temperatures of 180-250 °C, since heat treatment of wood allows increasing its moisture resistance, reduce hygroscopicity, and increase resistance to decay. However, a decrease in the hygroscopicity of wood adversely affects the process of obtaining glued materials due to a decrease in the wettability of thermowood surface and, as a consequence, a decrease in adhesion characteristics. This work is devoted to the study of the effect of ozone on the surface of thermally modified wood to increase the adhesive properties during gluing. It has been determined that the ozonation contributes to an increase in the wettability of the surface layer of thermal wood by more than 15% due to the reactivity of ozone to oxidize and degrade ligno-containing products of wood. It was revealed that the modification of wood, including preliminary volumetric heat treatment followed by surface treatment with ozone, causes an increase in the strength of the glue line when operated in high humidity conditions. In connection with the results obtained, an improved technology for the production of glued load-bearing structures for wooden housing construction is proposed.

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Section: Methodsmentioning

confidence: 99%

Modification of the surface of thermally modified wood with ozone when creating glued structures

et al. 2021

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“…Extensive experimental results on the topic [1][2][3][4] were obtained earlier, the present study is based on them, but known statistics will not be enough to derive a moisture model. A review of some foreign studies [1,[5][6][7][8][9][10][11][12][13][14][15][16][17] shows a similar picture, but no results have been obtained for practical application in intelligent control systems. In this case, solving problems of this class is possible using the TFS (theory of fuzzy sets) apparatus, which should determine the relevance, goals and objectives of modern research.…”

Section: )mentioning

confidence: 99%

“…The drying process is considered as multi-parameter, therefore, studies were carried out with different goals and different parameters. So in [11], studies of oscillating vacuumconductive drying are presented, which resulted in the development of a method for calculating the rate of moisture removal from wood during vacuum processing depending on Advances in Engineering Research, volume 151 the magnitude of vacuum, temperature, humidity and thickness of lumber.…”

Section: A Review Of Literature On the Topic Of Wood Dryingmentioning

confidence: 99%

Fuzzy Modeling in the Management of the Lumber Drying Process: Formalization of uncertainties in the problem

Gorokhovsky¹,

Pobedinsky²,

Gorokhovsky³

et al. 2018

International Scientific and Practical Conference "AgroSMART - Smart Solutions for Agriculture" (AgroSMART 2018)

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The problem of lumber drying is considered. The relevance of the research is due to the need to improve the system of automated control of the technological process of drying lumber on the basis of modern information technologies, reducing the energy-intensity of these technologies, which is enshrined in the program documents of forest industry development at the governmental level. It is shown that the most effective solution will be the use of fuzzy modeling. In this case, the characteristics of the uncertainty of the input parameters and the influencing factors will be taken into account. The functional purpose of the automated control system is to provide a given level of moisture content of wood with the required quality of wood (exclusion of damage). It is extremely difficult to obtain such a functional dependence on the heating temperature in the drying chamber and equilibrium air humidity by traditional statistical methods due to the uncertainty of the parameters, therefore, the apparatus of the theory of fuzzy sets should be used for this task. The purpose of this work was to analyze researches in the field of lumber drying and substantiate the meaningful formulation of the problem of moisture content and lumber drying time modeling. The methodological basis of theoretical studies were: the drying theory, wood science, apparatus of mathematical and fuzzy modeling. The result of the research is the substantiation of the meaningful formulation of tasks of fuzzy modeling of the humidity and lumber drying time. The scientific novelty of research follows from the proposed theoretical approach to estimating the parameters of moisture content and drying time of lumber on the basis of fuzzy modeling. The practical applicability of the results lies in the possibility of using the developed problem statement for fuzzy inference of the functional dependence of the control of drying of materials.

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“…The development of eco-friendly chipboard materials has long been a hot topic. However, research is mainly aimed at reducing the toxicity of the adhesive component of this composite, and therefore solutions are proposed to reduce phenol emissions by introducing various additives or replacing phenol-containing resins with other more environmentally friendly binders [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…In this case, to prevent the growth of mold fungi and various wood-destroying microorganisms, a necessary condition is the biological protection of wood particles. For this purpose, modification with various chemical compositions is usually used [2][3][4]. However, chemical modification is dangerous both for humans and for *Correspondingauthor:joker775.87@mail.ru the entire environment.…”

Section: Introductionmentioning

confidence: 99%

Using vacuum conductive drying to improve the environmental friendliness of materials

et al. 2020

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To minimize the risk of rotting damage to wood materials, special antiseptic preparations with biocidal, fungicidal and insecticidal properties are widely used. Many of them contain highly volatile chemicals that are toxic to humans and harmful to the environment. The development of approaches to reduce the emission of harmful substances from wood materials is an important problem in improving the environmental friendliness of construction and finishing materials. The paper describes a method for increasing the biostability of chipboard based on polyvinyl alcohol binder by chemical-free high-temperature treatment (thermal modification). The paper presents the results of experimental studies of vacuum-conductive drying of wall panels made of thermally modified filler. Drying curves for wall panels were plotted depending on various parameters: temperature conditions, different chipboard thickness, and the residual pressure in the vacuum chamber. The work performed revealed that panels with a thermally modified filler dry much faster than those with untreated filler and without the release of chemical compounds harmful to humans and the environment.

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Increasing the Energy Efficiency of the Process of Oscillating Vacuum-Conductive Drying of Wood by Means of a Heat Pump

Cited by 10 publications

References 5 publications

Modification of the surface of thermally modified wood with ozone when creating glued structures

Modification of the surface of thermally modified wood with ozone when creating glued structures

Fuzzy Modeling in the Management of the Lumber Drying Process: Formalization of uncertainties in the problem

Using vacuum conductive drying to improve the environmental friendliness of materials

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