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 Ключові слова "ammonia"
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- ДокументDesign of periodic operation ammonia–water absorption refrigeration units in atmospheric water generation system(2017) Ozolin, N. E.; Titlov, A. S.It is a common knowledge that one of the most valuable resources in the future of our planet is going to be fresh water, and the demand for water resources is already one of the main factors in global logistics of contemporary world, and this trend will only grow in the foreseeable future. One of the developments in water production technology is mechanical air dehumidification — condensation of water vapor on the surfaces with a temperature below the dew point. In this case, there are great prospects for the methods associated with the work of independent generators of cold — chillers that are guaranteed to provide the temperature below the dew point temperature. A necessary condition for operation of compression refrigeration machine is the availability of electrical energy. At the same time, the majority of countries facing water scarcity are limited in energy resources, too. Often the readily available source of energy in there is the sun. In this regard there have been developed original schemes of absorption water-ammonia refrigeration units of periodic operation (AWRU PO) based on solar collectors, which differ with autonomy and independence from the sources of electrical energy, and unlike heat-analogues (steam jet and lithiumbromide absorption) can be operated with air cooling of their heat-dissipating elements.
- 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.
- ДокументThe search of energy–efficient operation mode of ammonia-water-absorption refrigeration machines(2017) Osadchuk, E. A.; Kirilov, V. Kh.; Mazurenko, S. Yu.A basic volume of the market of equipment for the separation of water from the air, in our times, falls on the systems, having in its composition compression refrigeration unit electrically-driven. At the same time, the use of compression unit is perspective only for the performance to 3-4 liters per hour. There is substantial growth of sizes of setting at more high performance. The necessary condition of work of compression refrigerating machines is the availability of electrical energy. At the same time, the overwhelming number of countries experiencing water shortages are limited in energy resources. The sun is the only source of energy that they have. Thus, the problem of obtaining water from atmospheric air is an actual scientific and practical task which didn’t find the decision up till now and most of the technical proposals remain on the level of patents.