Valentyna Bandura

• National University of Life and Environmental Sciences of Ukraine

The paper examines the intensification of drying apple slices to low residual moisture content. It is proposed to use an energy-efficient multi-stage mode of convective drying at 80/60 °C and a combined multi-stage mode with IR radiation and IR convective heating (100 W) + 60 °C / 60 °C. The paper presents the temperature and kinetic curves and cha...

Experimental and computational methods of studying the stress state in the plastic region are characterized by various methods and accuracy of measurements, methods of mathematical processing of experimental information, and interpretation of results. The experimentally determined kinematics as a starting point is the most widely used method to stu...

The relevance of the conducted research is conditioned by the increase in demand for oilseeds with improved and environmentally friendly qualities, namely, the replacement of a dangerous solvent in the extraction process of processing oilseeds. In this regard, this paper is aimed at investigating the use of an organic solvent, such as ethanol, in e...

Energy consumption, environmental issues, product quality are actual problems related to grain drying processes. It is necessary to pay attention to designing new structures of energy-efficient grain dryers. A structure of an energy-efficient grain dryer based on thermosiphons has been designed; its energy consumption is 3.5...6.8 MJ/kg depending o...

The topic provides an analysis of the current approach to healthy nutrition and represents a new functional fermented milk drink based on buttermilk containing natural prebiotics - a biologically valuable complex Spirulina platensis. The main tasks of the industry as a holistic system for the management and production of food ingredients and produc...

Background. The most effective and cost-effective method of improving the supply of micronutrients is the enrichment of consumer foods, which are the most com­mon and consumed by all groups of adults and children. One of the means of iodine deficiency prevention is iodized salt usage. The aim of the work is to develop the recipe and substantiate th...

The key process for extracting oils from raw materials is extraction. In this case, extraction is a complex and time-consuming process. The extraction process is characterized by low intensity. One of the most promising and innovative methods of extracting plant material is the use of microwave technologies. As there are no generally accepted recom...

This paper addresses the issues related to designing and estimating the strength of solid-alloy elements in the deforming broaches of significant diameter (exceeding 150 mm) for the developed process of discrete broaching. The tool limit condition was assessed based on two strength criteria: the specific potential energy of shape change and the max...

The purpose of this research is the further development of the methodology and methods of optimising the parameters of root pile combined cleaners of a root crop harvesting machine. We have conducted theoretical and experimental studies of the combined cleaning system’s functioning process. By executing the analysis, we found the motion of the fodd...

The article reviews various techniques for mathematical modeling of the soybean drying process. The purpose of this paper is to review, analyze and compare existing approaches to mathematically describe the processes of moisture movement during microwave drying of soybeans. The only way to provide mathematical modeling of the processes occurring in...

This paper concentrates on approaches to mathematical modelling of oily raw material extraction process. «Evolution» of modeling hypothesis based on analysis of differential diffusion equation under the right boundary and initial conditions; on simplified model of Fick's equation and on material balance equation; on mass transfer model in adsorptio...

The paper reports results of investigating innovative equipment for the integrated processing of food raw materials, which would make it possible to implement the local energy influence directly on the particles of a dispersed material, the near-boundary layer, the moisture retained in the product's solution or capillaries. The analysis of food ra...

The aim of the conducted study is to determine kinetics of the complex effect of microwave energy supply and filter drying of the process of water release from the wheat layer. There is offered a combination of MW and filter drying. A special feature of this combination must be its more effectiveness and high speed of water elimination from surface...

The factors affecting the process of vibration-planetary centrifugation such as moisture velocity, product density and moisture, design and technological characteristics of the dehydrator are determined. On the basis of these factors, using the dimension analysis method, a criterion equation was compiled describing the process of vibration-planetar...

Different technologies of soybean seed drying are considered, their positive and negative sides are revealed. A comparative analysis of drying methods was carried out. It is established that the drying of soybean seeds in an electromagnetic field is one of the most promising. A combination of two methods of drying infrared and microwave soybean see...

The article presents the results of experimental studies of the air heating efficiency in heliocollectors with different surface forms developed in order to justify their use in equipment for active ventilation of grain and feed raw materials.

Currently, drying of food materials by infrared radiation (IR) becomes widespread. The technology of dehydration of products and materials is far ahead of the theoretical drying conditions. Not only classical literature on problems of drying, but also special literature does not give concrete recommendations for the design of installations with ele...

We have analyzed the extraction process in the technology of oilseed processing. This paper describes the original provisions, specificity, modern scientific schools, and the level of representation of the classic extraction process. The specificity of mathematical modeling of the extraction process, given the introduction of an additional driving...

The paper contains theoretical substantiation of the processes of radiation-convective heat and mass transfer between all the defining objects inside the vibration dryer with IR energy supply. The presented equations, developed on the basis of the heat and material balance, describe the basic dynamic characteristics of the drying mode for oil-beari...

In this paper, we emphasize that the most important problems in human development (energy, ecology, food) are in typical of the food-production sector, and their solutions are connected with the search for fundamentally new approaches to the thermal processing of raw materials. The prospects of electrotechnologies of targeted energy delivery for si...

Intensification of the technological processes in the production of vegetable oils is a topical scientific and practical task. It is assumed that extracts from the plant raw materials obtained by exposure to the electromagnetic microwave field possess qualitatively new biochemical and biological properties in comparison with similar extracts obtain...

The theoretical basis of the agricultural material drying techniques has been formed in the world for two and a half centuries. Nevertheless, despite the multitude of studies well presented in the literature, the industry still lacks universally recognized methods of design calculation for the majority of drying problems. Presumably, this is due to...

One of the ways to raise the quality of sugar beet harvesting is the use of improved digging tools that are able to dig out root crops from the soil without any loss and considerable damage, as well as cleaners of the heap from admixtures. Perspective are the root crop harvesting machines, built according to the modular principle, where, depending...

The use of ploughing machine-and-tractor aggregates, operating according to the principle of ‘push-pull’, finds increasing application in the world since it allows ensuring the stability of the movement and the depth of ploughing, reduction of the energy indicators. The aim of this experimental study is to determine under field conditions the dynam...

The advantages of wave technologies in comparison with traditional thermal technologies are considered. The aim of research is using of innovative wave technologies to intensify the processes of heat and mass transfer in the processes of dehydration and extraction, while reducing energy costs. A classification of the mechanisms of intensification o...

The grain milling process, in which flour is produced, is very important since it radically changes the quality and quantity characteristics of products. The main milling machine used during the last two centuries in the leading branches of food industry is a roller mill. The way in which the materials are comminuted in the roller mills is based on...

The experimental measuring equipment and procedure are described. It is found that the local and mean heat transfer between the wall of a totating tube and a turbulent airflow decreases with increasing rpm. Generalized equations are derived in dimensionless form.

We present the results of an investigation into the roughness elements of a wing profile on the transfer of heat and aerodynamic resistance of a plate and a tubular surface. Criterial formulas have been derived for the calculation of the heat transfer and resistance. An evaluation of the efficiency of these tubes has demonstrated that knurling the...