В настоящей рубрике публикуются аннотации к статьям «Вестника Международной академии холода» ("Вестника МАХ") - международного ежеквартального научно-теоретического журнала, являющегося печатным органом общественной организации - «Международной академии холода» ("International Academy of Refrigeration").
Вестник МАХ издается с 1998 года.
Главный редактор журнала: Бараненко Александр Владимирович, д-р техн. наук, профессор.
Тематика журнала: "Исследования и разработки по всем направлениям холодильной и криогенной техники, кондиционированию воздуха и проблемам экологии".
The international scientific-theoretical quarterly magazine about scientific and technical developments on all directions of refrigeration, cryogenic engineering and technology, air conditioning and problems of ecology.
«Vestnik of International Academy of Refrigeration» – published since 1998.
1. Работа испарителей с импульсным регулятором перегрева пара / Канд. техн. наук А.И. ЕЙДЕЮС, канд. техн. наук Ю.Н. СЛАСТИХИН, М.Ю. НИКИШИН
(Балтийская государственная академия рыбопромыслового флота), В.Л. КОШЕЛЕВ (ООО "Рефимпекс")
Electronic Pl-regulation systems of evaporators feeding by liquid refrigerant with magnetic drive of valve, which work in pulse width modulation mode of operation, are considered in this article. The relative duration of valve opening dependence of evaporator vapor zone change sizes and vapor superheating is received. This duration defines the change of control action. The type of evaporator transition functions at different actions is presented. The comparative evaluation of different regulators is presented.
2. О неравномерности полей температуры газа в рабочих камерах многоступенчатого поршневого компрессора / Д-р техн. наук А.Ю. ГРИГОРЬЕВ
(Санкт-Петербургский государственный университет низкотемпературных и пищевых технологий)
Prediction of gas temperature in working chambers and at the exit from the stages of reciprocating compressor allows determine optimum construction at the design step. For the determination of local parameters of gas in the stage of the chamber, a mathematical model based on Reynolds equations for the turbulent non-stationary flow of viscous gas was used. The results of the calculation of local temperatures in all the stages of air-cooled five-stage reciprocating compressor with rotation frequency of shaft 1470 / min. are presented. The explanation of the obtained picture of temperature fields is given.
3. Расчет тепловлажностного режима в краевых зонах неоднородных участков ограждающих конструкций / Канд. техн. наук С.В. КОРНИЕНКО
(Волгоградский государственный архитектурно-строительный университет)
This abstract is devoted to the decision of three-dimensional problem of simultaneous nonstationary heat and moisture transmission for enclosures based on moisture potential. The usage of two arguments as temperature and absolute moisture potential, determining moisture transmission in nonisothermal conditions, allows to simplify materially physical and mathematical model of simultaneous heat and moisture transmission. The method mentioned above is realized in computer program. There are results of calculation of heat and moisture transmission for three-layers wall panel with the keyed joint. This method is the convenient instrument for forecast of heat and moisture condition of enclosures while designing.
4. Теплофизические свойства обитаемого помещения судна при нестационарных нагрузках / Канд. техн. наук В.В. ВЫЧУЖАНИН
(Одесский национальный морской университет)
With unsteady loads (variable outside air temperature and solar radiation) the temperatures in the berth depend on the thermophysical parameters of enclosing surfaces . In the calculation of thermophyscal parameters of enclosing surfaces, air velocities inside and outside the berth are usually considered as constant. However, they have a significant effect on thermal resistance of walls of the room with unsteady loads. Relevant relationships have been found indicating real values of thermal resistances, which should be taken into account in the development of the system of automatic control for air conditioning.
5. Линия насыщения аммиака / С.В. РЫКОВ, д-р техн. наук В. А. САМОЛЕТОВ, д-р техн. наук В.А. РЫКОВ
(Санкт-Петербургский государственный университет низкотемпературных и пищевых технологий)
The equations of a line of elasticity and saturation line allow: to make a basic file of points (pH,p,Тs ) which is necessary for using for maintenance of a coordination of thermal param?tres on a line of phase equilibrium; to construct the uniform nonanalytic equation of state, in function of singularities which included instead of classical scale variable x generalised scale variable x; to make a basic file of points µ, p, Тs). This file is necessary to using, if it is required to provide equality of chemical potentials at the same temperature on steam and liquid branches of a line of phase equilibrium. The known equations of a line of elasticity and saturation line of ammonia do not allow transferring behaviour of a thermodynamic surface in a vicinity of a critical point according to requirements of the modern theory of the critical phenomena. In the given work the equations describing a line of phase balance of ammonia according to requirements of the modern theory of the critical phenomena are offered.
6. Аппроксимация целевых функций для оптимизации параметров хладоносителя / Канд. хим. наук В.В. КИРИЛЛОВ
(Санкт-Петербургский государственный университет низкотемпературных и пищевых технологий), канд. физ.-мат. наук В.В. ЧАШНИКОВА (Санкт-Петербургский государственный университет)
Using the least-square-method an approximation of viscosity and freezing temperature of water-propylene glycol coolant, containing NaCI, from its composition has been carried out. A possibility of selection of optimum parameters for electrolyte water-propylene glycol coolant is shown.
7. Особенности выбора оборудования для системы холодоснабжения камеры дозаривания бананов / Канд. Д-р техн. наук А.Я. ЭГЛИТ, Д.А. БОБИН
(Санкт-Петербургский государственный университет низкотемпературных и пищевых технологий), канд. физ.-мат. наук В.В. ЧАШНИКОВА (Санкт-Петербургский государственный университет)
Bananas, collected and transferred to Russia in green state, before sales are subjected to artificial ripening in special rooms, where temperature must be lowered each day by 1...2°C (from 18 to 14 °C). The article deals with the calculation of heat gains during ripening of bananas. The procedure and order of calculation of heat gains from air humidifiers in the room, not covered by GOST requirements, but constituting the important value is presented. It is shown, that the total heat load of refrigerating equipment during ripening of bananas varies in time and has the maximum on the second and third day of the process. The existing techniques implying maximum loads lead to the use of too powerful equipment.
8. Расчет теплового поля и поля термомеханических напряжений сильноточного термоэлемента слоистой конструкции / Т.А. ИСМАИЛОВ, О.В. ЕВДУЛОВ, Д.В. ЕВДУЛОВ
(Дагестанский государственный технический университет)
It is considered accounting model flaky thermoelement, calculated on greater токи of the feeding. Heat fields and field thermomehanical efforts are received in him. They are shown advantage strongcurrent to flaky design thermoelement before classical П-figurative.
(Санкт-Петербургский государственный университет низкотемпературных и пищевых технологий)
A linear dependence of nitrogen cryoadsorption pump out speed from the sorbent NaX temperature has been experimentally established. In the temperature range 78-110 K the temperature coefficient of the pump out speed is 0,031.
10. Исследование тепловых режимов мощных полупроводниковых преобразователей энергии / Канд. техн. наук Е.В. ДИЛЕВСКАЯ, С.И. КАСЬКОВ, академик РАН А.И. ЛЕОНТЬЕВ
(МГТУ им. Н.Э. Баумана)
The paper considers problems connected with ensuring normal thermal conditions, for functioning of powerful solid state power transformers, being used in different industries. The operational parameters, schemes and designs are presented. Main factors, determining thermal conditions are identified; methods of investigations and results are presented and the challenges for future investigations are indicated.
11. Математическое моделирование температурного состояния элементов конструкции трубчатого теплообменника дискового излучателя / Д-р техн. наук И.В. СТАНКЕВИЧ, А.А. ПОПКОВ-МЕЛЕНТЬЕВ
The paper considers peculiarities of mathematical modeling of the temperature state of a disk radiating device tubular heat exchanger structure elements during its operation in the space conditions. The solution of non-linear three- dimensional stationary problem of heat transfer under the conditions of constant thermophysical characteristics has been formulated and derived. The authors have developed a technique for numerical solution of a three- dimensional temperature problem for the element of structure of disk radiating device heat exchanger, based in the outer space, on which the algorithm of solution has been derived and a complex of software package has been developed. The numerical investigation of the temperature state of the element of structure of a disc radiator heat exchanger has been carried out. A comparative analysis of the temperature state for different operational conditions has been carried out.
(Кемеровский государственный сельскохозяйственный институт), канд. физ.-мат. наук В.В. РАГУЛИН (Кемеровский государственный университет)
River ice crossing building are very actually in the Siberia and to the North of the "TRANSSIB". Fast freezing of river ice crossing is possible on the basis of process of adiabatic freezing a lot of ice granules together in ice water. We research kinetics of freezing of bi-granule (a couple of ice balls contacting each other). The process is accompanied with fast growing crosspiece between the balls and dinamic changing form of borders of the bi-granule. The article presented description of kinetics, mathematic two-measure (in view of axial symmetry in cylindrical co-ordinates) model of the process as the Stephan problem and experiments. We found correlations between mass and some geometric parameters (form, angle and radius of curve of slot) of freezing couple from freezing time etc.
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Учредитель и издатель сетевого СМИ: Маргарян С.М.
Адрес редакции: Россия, г. Москва, Шипиловский проезд, д.47.
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Первый выпуск первой в России интернет-газеты по холодильной и близкой ей тематике - "Холодильщик.RU" - вышел в свет в январе 2005 г.
Руководитель проекта и Главный редактор: Санасар Маргарян
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