Scientific Journal of KubSAU

We have presented technical solutions of an energy supplying complex of apiary based on a solar plant, which ensure its functioning in the winter. Various aspects of the influence of the snow cover on the functioning of the complex are considered in the article. The favorable effect of the snow cover includes increasing the diffuse insolation, improving the thermal insulation of the building for placement of bees, which protects bee families from fluctuating external temperature. The negative effect of the snow cover includes adherence of snow to the receiving surfaces of solar energy converters, which can lead to decreasing the efficiency of using of photovoltaic modules and solar collectors. Both active and passive methods of combating snow sticking are suggested in article. Passive methods include installation of solar energy converters at an angle close to 90°, as well as their placement on the windward side. The simulation of the functioning of the complex based on a solar plant was conducted for climatic conditions of the Republic of Mari El (the time interval – from 14 October to 14 April, a photovoltaic module area – 1,3 m 2 with installation angles of 72˚ and 88˚). Because of the simulation, we obtained graphs of the changing the power of the photovoltaic module. Active methods include air injection onto the receiving surfaces of solar energy converters and using of heating elements

The article describes the modeling process of the heating system operation of a livestock-breeding complex. It presents graphs reflecting the influence of technological parameters of heat supply system of cattle-breeding complex with a catalytic combustion device on the parameters of energy efficiency of the system and the parameters characterizing the stability of the temperature conditions in the livestock sector

The article presents investigations of engine oil with the addition of special additives and reactions of the composition in the process of friction on the metal surface, simulating the boundary and hydrodynamic friction

The article presents the mathematical model for determining the temperature after passing trough nozzles of press-granulator, which allows to take into account heat loss through the exterior surface

During the study, the authors have solved the problem of determining the minimum number of operations by optimizing fillability of a claw-shearing device with trees. Sufficient optimality conditions have been obtained. The numerical method for solving the optimization problem was developed. We have also performed a numerical experiment

The article presents the methodology and the results of experimental studies to determine actual values of effort arising from uprooting trees and shrubs plan-tations in the Republic of Mari El. On the basis of experiments and regression analysis we have established the coefficients of the approximation-defining relation between the force and the diameter of the stem of tearing depending on the type of crops

This article discusses the use of nuclear magnetic resonance spectroscopy for the determination of biologically active substances-producing plants in the culture of in vitro and in situ. The same is said about the benefits of obtaining biologically active substances from plants in culture in vitro. Formulated a number of problems for theoretical study and experimental development basic principles on the use of nuclear magnetic resonance spectroscopy in pharmaceutical analysis for standardization and quality assessment of BAS

The article presents the description of the method and the results of the experimental research of loading of driving mechanism of felling head of a forest machine

The article presents a brand new approach to the issue of automation of a workflow of the felling head to retain the truncated tree in an upright position when it is carried out of the woods. The model of holding tree upright and a block diagram of the position control of the felling head have been presented

The article presents the original study material designed to determine the influence of soil properties on the cross rate of the transport system. These data allow us to determine the efficiency changes compositions transport system for transporting long cargo