Issue 3 (142)
Section 1. Refrigeration engineering
А. N. Gorin, М. V. Dyomin, I. N. Krasnovskiy, А. B. Kudrin
STUDY OF HOUSEHOLD REFRIGERATOR NORD DX-239 REFRIGERATION CHAMBERS AND FREEZERS EVAPORATOR TEMPERATURE FIELD SURFACE
The effect of charging dose and ambient temperature on the distribution temperature on the refrigerator and freezer chambers evaporator surface is shown and justified using the example of a household refrigerator DX-239 operation.
Keywords: Household refrigerator – Compressor system – Charging dose – Working time coefficient (WTC) – Temperature on the evaporator surface – Specific mass refrigerating capacity.
Yu. А. Ocheretyaniy
DETERMINATION OF SHIP REFRIGERATION PLANT FUNCTIONING DEVIATIONS DURING OPERATION
The issues related to the definition of deviations and nature of the failure of ship refrigeration plants defined by changes in the thermal characteristics in the process of their operation are considered in the article.
Keywords: Thermal performance -Real cycle -Ship refrigeration plant
V. I. Knyazyuk, А. E. Lagutin, V. V. Rechitskiy
EXPERIMENTAL DATA SUMMARY FOR THE RESEARCH OF PIPES IN THE FEW ROWS OF BUNDLESWITH SLOPE FINS
In this paper different layout decisions fortubes in bundlesare examined.Thermal and aerodynamic characteristics of the few rows ofbundles with cross slope ribs are assessed. The generalizing criterion dependencies according to thermal and aerodynamic characteristicsof finned tubes in bundles are obtained.
Keywords: Few rows bundlestubes –Finned tubes –Aerodynamics –Heat exchange – Experiment
Т. D. Shestova, Т. L. Lozovskiy, V. P. Zhelezniy
PREDICTION OF REFRIGERANT SURFACE PROPERTIES BASED ON THE GRADIENT THEORY WITH STATE CUBIC EQUATION
New prediction methods of the surface tension, density profile and liquid surface layer thickness closed to the vapour-liquid interface based on the gradient theory is proposed in this paper. Refrigerants are considered as research objects. New modification of Peng-Robinson’s cubic equation of state is used by authors in calculation algorithm for surface properties, which doesn’t require information about critical parameters. A new method for calculation of influence parameter is offered. Being carried out verification of methodology for prediction of liquid surface properties shows that the calculated values of surface tension of refrigerants are in agreement with presented in the literature information with enough accuracy for practical applications.
Keywords: Gradient theory – Equation of state – Influence parameter – Surface tension – Gradient profile – Surface layer thickness.
L. N. Yakub
CANONICAL EQUATIONS OF STATE AND THERMODYNAMIC PROPERTIES OF SOLIDIFIED INERT GAS
Using the new canonical equation of state developed for the solidified noble gases crystals, thermodynamic functions of the solid xenon - specific volume, enthalpy, and entropy are calculated on the melting line in a wide range of temperatures – from the triple point to the room temperature.
Keywords: Equation of State – Helmholtz Free Energy – Solid Xenon – Melting Line – Entropy –Enthalpy
Section 2. Power engineering and energy saving
А. N. Bundyuk, Е. О. Ulitskaya
DEVELOPMENT OF ALGORITHMS FOR STRUCTURAL ANALYSIS OF COGENERATION POWER INSTALLATION
A cogeneration power plant, installation, the apparatuses of which are integrated by gas-air line and water circuit is considered. A mathematical model of CPP statics on the basis of which the algorithm for calculating of the static characteristics of the CPP is proposed. As a result of calculation the scheme of heat distribution generated from the fuel combustion is constructed.
Keywords: Cogeneration power plant – Internal combustion engine – Heat balance
А. V. Doroshenko, V. A. Orlov
SOLAR COGENERATION SYSTEMS OF POWER-, HEAT-, AND COLD SUPPLY
Principal circuit decisions of solar cogeneration systems for the simultaneous production of electricity, heat (hot water), cold (evaporative chillers of gases and liquids), air drying, air conditioning (hydrothermal treatment of air streams) were developed. The inclusion of PV modules into the developed systems provides power to the fans and liquid pumps, significantly increasing the autonomy of the solar systems. Usage of available cold waste streams (in water coolers and evaporative air coolers) for PV modules cooling provides the growth of PV modules COP without additional expenses of energy on their cooling, that greatly increases the efficiency of not only the converters but also of the solar system as a whole.
Key words: Solar Systems, Solar Power Inverters, Thermal Converters, Power Converters, Absorption Cycle, Drying Unit, Cooling Unit, Cooled Photovoltaic Modules
Section 3. Refrigerating and accompanying technologies
G. V. Krusir
THE WINERY ECOLOGICAL ASPECTS
The issues of wineries solid waste analysis as the environmental aspects of the wineries, as well as reducing the burden on the environment through the use of wineries solid wastes as secondary raw material for the new product obtaining are considered. The results of the wineries solid waste analysis as a valuable raw material for feed additive obtaining are given. It is proved that the dominant substance of marc and crests chemical composition are carbohydrates, namely cellulose.
Keywords: Wine Making – Waste – Environment.
G. V. Krusir
PUFF PRODUCTS TECHNOLOGY CRITICAL POINTS ASSESSMENT
The issues of bakeries analysis as a source of negative impact on the environment are considered. An assessment of bakeries environmental risk based on critical control points was performed.
Keywords: Bakeries – Ecology
Yu. О. Kozonova
JUICE CONTAINING BEVERAGES FOR ATHLETES
One of the modern trends of the food industry development is the production of functional beverages. The opportunity to expand the assortment of juice beverages by entering as their constituent the energeticcomponent in the form of bean flour and cereals, which allows to obtain the product with higher nutritional value and functionality is offered in the article
Keywords: Energetic beverages – Starch fermentation – Dynamic viscosity – Gelatinization
BIOCHIPS IN FOOD TECHNOLOGIES
One of the modern technology development trends is the biochips’ elaboration and introduction. In this article characteristics and the biochip industry development stages are given, also the principle schemes are considered. It is shown, that due to the biochips’ advantage, they are expedient to use for the food products’ analysis realization to determine their high quality.
Keywords: Biochip – Biosensors – Microarray
S. N. Petushenko
RESULTS OF EXPERIMENTAL STUDIES OF HEAT TRANSFER PROCESS AT REFRIGERATOR WHEN THE PRIMARY REFRIGERATION PROCESSING OF GRAIN OF SMALL-SEEDED CROPS
The results of experimental studies of heat exchange by blowing grains to cold air. Obtained by generalizing theequationforrape
Keywords: Heat transfer – Rape – Generalizing equation
А. L. Tsikalo
MOLECULAR DYNAMICS OF DISPERSE SYSTEMS. 2. DISPERSION MEDIA – SIMPLE LIQUIDS AND GASES SOLUTIONS
The method of molecular dynamics study of the dispersion environment, which is the solution of simple liquids (spherically-symmetric particles), is considered. This technique can also be used for molecular dynamics studies of compressed gases mixtures. The results of the work are one of the study foundations of the dispersed, including colloidal systems, the nanoparticles’ dynamics in such dispersion systems as well as the respective nanoflyuids’ physical, chemical and thermal properties of.
Keywords: Liquid and gas solutions – Spherical-symmetric particles – Physical and chemical properties – Molecular dynamics – Radial distribution functions – Structure of solutions – Colloids – Nanoparticles – Nanofluids
Section 4. Automatic, computer and telecommunication technologies
А. Yu. Venediktov
PROBLEM SOLUTION OF SECONDARY DATA CONVERSION ON PLASMA PARAMETERS BY EVOLUTIONARY STRATEGIES
The questions of applying of evolution strategy to data processing of information that received from retarding potential analyzer are described in this paper. The article presents a comparative evaluation of the effectiveness of this method with respect to other search algorithms solutions.
Keywords: Plasma – Evolution strategy – Data processing
V. І. Sakharov
LOCAL NETWORK UTILIZATION FOR TEMPERATURE AND HUMIDITY CONTROL
The devices for access to computer local area networks construction features, with microcontrollers and single chip ethernet interfaces, company microchip enc28j60 and enc424j600 chips utilization are examined
Keywords: Microcontroller – Interface – Ethernet