Interaction analysis of the electrotechnological system “emitter-material” in the process of heating and drying of food plant raw materials

The research was carried out at the expense of the grant of the Russian Science Foundation No. 23-76-01090, https://rscf.ru/project/23-76-01090/. The article considers the issue of placing boards in a drying plant using infrared film electric heaters. Two options for placing one cubic meter of boards with a thickness of 25 mm and 50 mm are proposed for consideration. The boards are placed between shields with film electric heaters and are separated from each other by transverse gaskets, it is obvious that more gaskets are needed to accommodate boards with a thickness of 25, which means that the distance between the boards will be greater. Hence the hypothesis: an increase in the distance between the shields will lead to an increase in drying time and electrical energy costs. For a theoretical solution, the following is proposed – to present the piled stack in the form of a prism and, considering the known dimensional parameters of the skipped shield, according to a well-known formula, it is possible to obtain a dependence describing changes in the irradiation coefficient on the distance in the radiator-receiver system. The considered irradiance coefficient shows how much of the total radiation from the area of the “receiver” falls on the surface of the “receiver”. As a result, an exponential dependence is obtained, according to which it can be determined that the irradiation coefficient for the placement of boards with a thickness of 25 mm is 8% less than for boards with a thickness of 50 mm, which ultimately will affect the duration of the drying process and the cost of electrical energy. Options are proposed to increase the drying efficiency by increasing the irradiation coefficient by reducing the distance between the panels with film electric heaters. In conclusion, in view of the result described in this article, the main directions for further research on improving the “radiator-receiver” system in relation to drying plants based on film electric heaters are given.

Section: Methodsmentioning

confidence: 99%

Justification of the effective distribution of energy emitted by a film electric heater on stacked lumber

Levinskiy

2024

“…With the advent of new low-temperature infrared radiation generators (such as film electric heater), it became possible to organize a new technology for drying wood with infrared radiation in a vacuum chamber capable of meeting, firstly, modern environmental safety requirements (because there are no combustion products and coolant, the probability of leakage and ingress into the soil of which cannot be excluded), secondly, the requirements of energy saving, since the drying mode is based on accurate knowledge of the optical properties of raw materials, the required exposure power and the wavelength of the generator radiation [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Comparative experiment on the use of a film electric heater for drying wood in vacuum conditions

Levinskiy

2024

The research was carried out at the expense of the grant of the Russian Science Foundation No. 23-76-01090, https://rscf.ru/project/23-76-01090/. The article outlines the need for woodworking enterprises to re-equip existing ones and create new technologies for deep processing. The trends of the Russian market dictate the conditions for choosing primarily domestic equipment, in this regard, the development of innovative, energy-saving, environmentally friendly wood processing technologies is relevant. Drying plants with the use of film electric heaters in vacuum conditions are a promising area of research. The proposed development will reduce the carbon footprint, with the output of high-quality lumber and reduced energy costs. The materials present the results of an experiment on the use of a film electric heater for drying wood in vacuum conditions in comparison with the traditional technology of its application. As a result, drying in vacuum conditions allowed to reduce the process by 35%, electric energy costs by 25%. The obtained result indicates the feasibility of further research in the field of low-temperature drying in vacuum conditions.

“…The primary task is to study the optical properties of the IR radiation generator and the spectral characteristics of wood of various breeds, followed by their coordination into a single system "emitter-receiver" [14][15][16][17]. The IR spectroscopy method was used to measure the interaction of infrared radiation with matter.…”

Section: Introductionmentioning

confidence: 99%

Spectral analysis of various types of wood as the basis of low-temperature drying technology in vacuum conditions

Levinskiy

2024

The research was carried out at the expense of the grant of the Russian Science Foundation No. 23-76-01090, https://rscf.ru/project/23-76-01090 /. The characteristics of various types of wood (oak, aspen, pine) were obtained in the laboratory on the basis of the South Ural State Agrarian University using the infrared Fourier spectrometer FSM 2201. For these rocks, the wavelengths at which the maximum absorption of radiation occurs are determined, which is consistent with the operating modes of the film electric heater. The obtained result will become the basis for further research aimed at developing and creating a prototype of an infrared vacuum drying plant and an automatic control system for regulating and investigating the process in a discharged environment.