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No 6 (2020)

Articles

Mirovoy rynok vozdushnykh konditsionerov

- -.
Refrigeration Technology. 2020;(6):6-7
pages 6-7 views

Rynok konditsionerov v Rossii (2019 g.)

- -.
Refrigeration Technology. 2020;(6):8-9
pages 8-9 views
pages 10-12 views

Novye osevye ventilyatory AxiEco Protect kompanii ebmpapst dlya HVAC&R

Shishov V.V.
Refrigeration Technology. 2020;(6):13-13
pages 13-13 views
pages 14-15 views
pages 16-19 views

Osobennosti teplovogo rascheta porshnevogo kholodil'nogo kompressora

Syazin I.E., Kas'yanov G.I., Gukasyan A.V.

Abstract

Designing refrigeration reciprocal compressors is a knotty engineering problem. Refrigeration reciprocal compressors differ considerably from the gas ones. To calculate refrigeration reciprocal compressors specially developed mathematical models, which are described in educational and scientific literature, are used. A number of hairy calculations should be performed when designing a compressor. One of them is a thermal calculation intended for determining the baselines of the designed compressor, which will be the basis for following calculations such as gasdynamic, dynamic, strength ones, etc. When performing the thermal calculation, the designer needs to find the optimal values of the diameter and stroke of the piston (basic design indicators), making a start from the calculated data and the indicator diagram. This article considers the main features of the thermal calculation of a refrigeration reciprocal compressor based on a specific example
Refrigeration Technology. 2020;(6):20-24
pages 20-24 views

Absorbtsionnaya kholodil'naya mashina v sisteme razdeleniya vozdukha dlya polucheniya meditsinskogo kisloroda

Galimova L.V., Sedoykin I.E.

Abstract

The generation of medically pure oxygen is an urgent problem of today. The observation of the operation of air separation plants over a long period of time made it possible to define that in Russia in hot regions in summer the produced capacity of air separation plants (ASP) decreased as well as the quality of the product. To improve the high pressure ASP operation the authors offer to implement an energy saving system on the basis of the lithium bromide refrigerating machine providing atmospheric air cooling before supplying into a compressor. Whereupon, a special role is given to the definition of the concentration of oxygen generated.
Refrigeration Technology. 2020;(6):25-29
pages 25-29 views

Proektnye resheniya skhemy kholodil'noy mashiny s utilizatsiey teploty kondensatsii

Korotkiy I.A., Neverov E.N., Prib I.A., Mokrushin M.Y., Goleshov D.I., Lonshakov V.G.

Abstract

Refrigerating units are widely used in various sectors for artificial cold generation. While maintaining low temperatures, refrigerating machines produce a large amount of heat at cooling and condensation of a refrigerant on the high pressure side. The heat produced is not used in any way and is emitted into the environment. The article offers a circuit of a refrigerating machine that makes it possible to utilize the condensation heat and to transfer it to various consumers of heat energy at the facilities, thereby reducing the heat emission into the atmosphere and increasing technological capabilities of cooling. The methods for selection of heat exchange apparatuses, included in the circuit, which make it possible to utilize the condensation heat, are described. This methodology can be used when designing refrigeration circuits for new facilities as well as for modernization of circuits of already operating refrigeration factories.
Refrigeration Technology. 2020;(6):30-33
pages 30-33 views

Puti uluchsheniya finansovogo sostoyaniya predpriyatiya promyshlennogo kholoda

Skryabin O.O.
Refrigeration Technology. 2020;(6):34-37
pages 34-37 views

M.V.Lomonosov ob ukreplenii oboronosposobnosti rossiyskogo gosudarstva

Butorina A.V., Antipin L.N., Butorin E.A.
Refrigeration Technology. 2020;(6):38-43
pages 38-43 views

Kinetika fermentativnykh reaktsiy osennikh sortov yablok pri kholodil'nom khranenii s primeneniem trekovykh membran

Kolodyaznaya V.S., Kostyuk V.A.

Abstract

The article gives the results of a study of the influence of an oxygen reduced concentration and a carbon dioxide increased concentration at cold storage of apples of autumn variety on the activity of terminal oxydases, involved in the regulation of physiological and biochemical processes at the final stages of oxidation of respiration substrates. The aim of the research is to study the change of the activity of terminal oxidases depending on the cold storage duration in the gaseous atmosphere with reduced oxygen concentration and increased carbon dioxide concentration formed by a biological method using gas selective track membranes. The test subjects were the apples of autumn varieties Grushovka Yudicheva, Kordonovka and Pepin Shafranny, grown according to the generally accepted technology in the garden of collection trees of the Pavlovskaya experimental station of the N.I. Vavilov VNIIR. To form a gaseous atmosphere during the storage of autumn variety apples a new composite membrane was used, it consisted of a substrate based on the polyethylene terephthalate (PET) track membranes (TM) and a selective layer based on the organosilicon block copolymer (pore diameter 0,2 µm, selectivity 5,0). This membrane was developed in laboratories of the A.F. Ioffe PhysicalTechnical Institute and S.V. Lebedev NIISK. It was shown that during storage the change of the terminal oxidase activity depended on the apple variety, storage duration, gas composition and enzyme type. The kinetic dependences of changes in the activity of phenol oxidase, peroxidase, and catalyse enzymes on the storage duration of autumn apple varieties Grushovka Yudicheva, Kordonovka and Pepin Shafranny in the normal atmosphere (NA) and controlled atmosphere (CA) were revealed. The regression equations characterizing these dependences were obtained. The velocity constants of inactivation reactions of the enzymes studied during storage of autumn varieties in NA and CA were determined. It was established that the activity of the enzymes of phenol oxidase, peroxidase, and catalyse decreased when storing apples in CA with reduced oxygen concentration (up to 5,2±0,1%) and with increased carbon dioxide concentration (up to 3,6±0,1%) decreased. The velocity constants of enzyme inactivation reactions decreased 1,15-1,77 times depending on the variety and enzyme type. It was shown that when the apples adapted to the positive low temperature and the modified gas composition, then the terminal oxidases performed the regulatory function.
Refrigeration Technology. 2020;(6):44-49
pages 44-49 views

Obuchenie kholodil'nomu delu v Rossii pereshagnulo 100-letniy rubezh

Kazakova A.A., Lavrov N.A., Shishov V.V.
Refrigeration Technology. 2020;(6):50-54
pages 50-54 views

Novye patenty Rossii po kholodil'noy tekhnike i teplovym nasosam

Rukavishnikov A.M.
Refrigeration Technology. 2020;(6):55-60
pages 55-60 views

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