Сучасні проблеми холодильної техніки та технології (Modern problems of refrigeration technology and technology)
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Перегляд Сучасні проблеми холодильної техніки та технології (Modern problems of refrigeration technology and technology) за Назва
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- Документ30 років монреальського протоколу. Стратегії в сфері обігу озоноруйнуючих холодоагентів(2017) Возний, В. Ф.2017 р. – рік 30-тиріччя Монреальського протоколу про речовини, що руйнують Озоновий шар Землі. МП є правонаступником Віденської конвенції від 22 березня 1985 р. Вступив в дію МП з 01 січня 1989 року і на даний час є практично єдиною угодою світового співтовариства, яку підписали 203 країни світу, графік виконання вимог якої успішно виконується практично в усіх країн світу.
- ДокументAnalysis of the possibilities of a solar air conditioning system(2021) Ovchinnikov, M.; Zhykharieva, N. V.
- ДокументDevelopment of universal absorption refrigeration devices for operation in a wide range of ambient temperatures(2017) Selivanov, A. P.In the recent years, greater weight in the structure of agricultural production in Ukraine belongs to individual farms and farmers. In these farms arise the problems of forming a regular economical budget, including a major problem in the preservation of the grown crops for three to six months in commercial quantities and at minimal energy costs. However, the acknowledged fact in world practice is the loss of most of the harvest of agricultural products in the absence of adequate refrigeration storage. Currently, the bulk of Ukrainian harvested fruits and vegetables is traditionally stored in the basements, where during the warm seasons (August—November, April—May) the required temperatures (5…12C) often cannot be maintained. To ensure the required regimes of storage, the market of household and commercial refrigeration equipment for small wholesale manufacturers offers national and imported demountable (panel) cold storages of volumes 3...9 m3, equipped with compression refrigeration machines. In modern conditions in rural Ukraine, operation of such cells is hampered by lengthy power outages and by poor quality electricity incoming (range of fluctuation of voltage is 160—250 V). The current situation makes appeal to heat-powered pumpless absorption refrigeration units (ARU).
- ДокументDevelopment of domestic absorbtion refrigerator for operation in a wide range of external air temperatures(2019) Selivanov, A.; Titlov, A.
- ДокументDevelopment of systems for obtaining water from atmospheric air on the basis of absorption water-ammonia refrigerators and solar collectors(2019) Osadchuk, E. A.; Adambayev, D. B.; Maguryan, N. S.
- ДокументDevelopment of thermopressor systems for air intercooling in multistage compressors(2021) Kobalava, H.; Konovalov, D.; Shkvorchenko, V.
- ДокументEfficiency evaluation of domestic solar assisted ground-source heat pump system for southern Ukrainian region(2017) Ostapenko, O.; Yakovleva, O.; Khmelniuk, M.With raising energy prices and more restricted environment regulations, the rational use of energy resources in household sector becomes more important. It is directly linked to increasing energy needs of humanity and the simultaneous depletion of traditional non-renewable energy resources in the world as a whole and in individual regions. Heat pumps are widely used in the chemical and food industries, housing and communal services. The use of heat pumps allows reducing greenhouse gas and carcinogenic substances emissions and, thus reducing human impact on the environment. The heat pump performance is based with following factors: the temperature of heat source, schematic diagram of the heat pump, climate conditions of the region, working fluids of heat pump (refrigerants and intermediate coolants), heat pump elements (type of compressors, heat exchangers, control systems).
- ДокументMathematical model of vapour condensation in the contact heat exchanger(2017) Butovskyi, I. D.Authors offer use condensation and cooling system based on the contact ejector heat exchanger. Such system allows to exclude completely losses at evaporation of hydrocarbons of oil products, and as a result, to exclude the environmental pollution connected with "small" breath of fuel tanks. Prospects of use of such systems are caused by the possibility of their placement in shallow regions, enough remote from large settlements that ensures additional safety of operation of reservoir parks, gas station.
- ДокументModeling of thermal modes of the reflux condenser of the absorption refrigeration unit(2019) Kholodkov, A.; Titlova, O.
- ДокументModeling of thermal modes of the reflux condenser of the absorption refrigeration unit(2017) Kholodkov, A. O.; Titlov, A. S.Currently, developers of modern refrigeration equipment, in accordance with the plans of the UN, are moving to natural refrigerants (hydrocarbons, carbon dioxide and ammonia) that do not have an adverse technological impact on the ecosystem of the planet. In domestic refrigeration technology, one of the options is absorption refrigeration units, the working body of which is an aqueous ammonia mixture with the hydrogen addition. Having a number of unique advantages over compression analogs, absorption systems are characterized by lower energy characteristics.
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- ДокументOperational efficiency improvements for refrigeration systems during summer period(2017) Nesterov, P. S.; Buyadgie, O. D.; Khmelniuk, M. G.; Yakovleva, O. Y.Nowadays Refrigeration Systems (RS) consume large amounts of electricity. That’s why RS pay significantly to the running costs of businesses with substantial cooling requirements. Improving simple operational practices with minimum cost can contribute to reduction energy costs by 20% or even more. It becomes more important as a price is placed on greenhouse gas emission in future years and as energy prices rise. Its importance also relates to an increased focus on reducing fugitive emissions from industrial systems such as refrigerant gas. It leads to a peak load on energy capacity in the summer, and has a disastrous effect on climate change, which in own turn leads to an increase in the maximum summer temperatures and their duration for the season. The latter factor causes an increased demand for cold, but at the same time an inevitable increase in the condensation temperature. Often it is accompanied by a destabilization of the refrigeration machine performance, up to an extreme fall in cooling capacity. As a result, the economy and the environment suffer.
- ДокументRadiative cooling method in the air conditioning system(2017) Tsoy, A. P.; Tsoy, D. A.In the modern world, refrigeration and air conditioning systems are rapidly developing industries with high energy consumption. In this regard, there is significant interest in improving energy efficiency.
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- ДокументThe cycle ensuring uninterrupted operation of the contact heat exchanger(2019) Kogut, V. O.; Bushmanov, V. M.; Khmelnyuk, M. G.; Zhikhareva, N. V.In this work, a method was proposed that can ensure almost uninterrupted operation of a device for trapping a pair of liquid fuels. The results are applicable in the fuel and energy field and can provide an improvement in the environmental situation.
- ДокументThermodynamic analysis of periodic operation ammo-nia-water absorption refrigeration units in atmospher-ic water generation systems(2019) Ozolin, N. E.; Kravchenko, V. V.
- ДокументАктуальность применения углекислоты в холодильной технике(2017) Водяницкая, Н. И.; Паскаль, А. А.Развитие холодильной индустрии находится в жестких экологических требованиях, по причине применением синтетических хладагентов, разрушающий озоновый слой земли и усиливая парниковый эффект атмосферы. Из за вышеперечисленного вырос большой интерес к природным хладагентам и промежуточным хладоносителям, для уменьшения ѐмкости холодильной системы и повышение их безопасности.
- ДокументАктуальність стельового охолодження приміщень(2021) Бурдюжа, С. А.; Беркань, І. В.
- ДокументАнализ ефективності двоступеневої системи кондиціювання повітря автономної теплоелектростанції підприємства харчової промисловості(2019) Грич, А. В.Метою даної роботи є аналіз ефективності двоступеневої системи кондиціювання повітря автономної теплоелектростанції підприємства харчової промисловості.
- ДокументАнализ перспектив создания энергетически эффективных моделей бытовой абсорбционной холодильной техники(2019) Березовская, Л. В.; Гратий, Т. И.; Биленко, Н. А.Целью данной работы является анализ перспектив создания энергетически эффективных моделей бытовой абсорбционной холодильной техники.