New installations for rapid freezing of foodstuffs with low-temperature air expanded in a turbo-expander

A. M. Arkharov; Архаров А. М.; A. Sh. Kobulashvili; Кобулашвили А. Ш.; T. M. Rosenoer; Розеноер Т. М.; I. N. Zhuravleva; Журавлева И. Н.; K. P. Wenger; Венгер К. П.; A. A. Antonov; Антонов А. А.

doi:10.17816/RF101199

New installations for rapid freezing of foodstuffs with low-temperature air expanded in a turbo-expander

Authors: Arkharov A.M.¹, Kobulashvili A.S.², Rosenoer T.M.², Zhuravleva I.N.³, Wenger K.P.⁴, Antonov A.A.⁴
Affiliations:
1. MSTU im. N.E. Bauman
2. Institute of Mechanics, Moscow State University
3. LLC "Tazholodtehnika"
4. MSU PB
Issue: Vol 93, No 9 (2004)
Pages: 2-7
Section: Articles
URL: https://journals.rcsi.science/0023-124X/article/view/101199
DOI: https://doi.org/10.17816/RF101199
ID: 101199

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Abstract

A possibility of use of turborefrigerators of type ATR working on the principle of the air refrigeration cycle for food technological processes is considered. The characteristics of turborefrigerators and turbo-detanders whose standard sizes were adapted to parametric range of screw compressors are presented.

On the basis of ATR and appropriate compressors the air refrigerating units ARA are created, that have become the basis for freezing-refrigerating-thermal stations (MHTS) producing cold for quickfreezing apparatuses and also low potential heat.

Characteristics of a tunnel quick-freezing apparatus STAB, which obtains refrigeration from turborefrigerator are given, and its comparison with other types of tunnel apparatuses is carried out.

Keywords

turbo expander unit, heat exchanger, management and control bodies

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Doctor of Engineering, Sciences

Russian Federation

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2. Rice. Fig. 1. Basic designs of RET series turbo expanders: a — turbo expander with gas static bearings (RET-GB); b - turboexpanders for temperatures below -80 °C with a combination of gas-static and hydrostatic bearings (RET-GOB); c - turboexpanders with hydrostatic bearings (RET-O B)

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3. Rice. 2. Tunnel quick freezer with a flow-through system for supplying low-temperature air (–60...–120 °C) from a turborefrigerator: 1 – quick freezer tunnel; 2 - turbo expander; 3 - pumping unit; 4—low pressure filter; 5 - recuperative heat exchanger; 6 - fine filter; 7 - drying block; 8 - moisture-oil separator; 9 - end cooler; 10 - screw refrigeration compressor; 11, 12 - compressor drive motors; 13 - circulation fans; 14, 15 - channels for air supply / exhaust; 16 - conveyor; 17 - thermostatic valve; 18 - shut-off air valve for automatic protection of the turbo expander; 19 - safety valve; 20, 21, 22, 23, 24, 25, 26, 27, 28 - stop valves; 29 - thermostatic valve

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4. Rice. Fig. 3. Methods for supplying low-temperature air from a turborefrigerator to a tunnel quick-freezer: a - through a distribution manifold: 1 - distribution manifold; 2 —exhaust air suction system; b - through special channels-air ducts: 1 - channel for supplying air to the apparatus; 2 - channel for removing air Q from the apparatus; 3 - side fan to create a directed air flow in the apparatus; 4 - circulation fans; c - inclined lattice screen: 1 - channel for air supply; 2 - lattice screen; 3 - channel for air exhaust

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5. Rice. 4. Nomogram for determining the reduced costs P and time t of freezing with low-temperature air, depending on the thickness 5 and the temperature of the supplied air / for freezing food products of class Psr. (P1... P 5)

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