Features of refrigeration screw compressor operation at ambient temperature decrease

Authors

DOI:

https://doi.org/10.25206/2588-0373-2020-4-3-9-14

Keywords:

oil-flooded screw compressor, condensation temperature decrease, co-regulation of cooling capacity and geometric compression ratio, liquid pump before throttling devices

Abstract

With a decrease in ambient temperature, the heat gain on the refrigeration machine and condensation pressure decrease,
which requires a decrease in cooling capacity and geometric compression ratio of the screw compressor. A condensation
pressure decrease below a certain value disrupts the stable operation of throttling devices. The article describes
the operation scheme of the refrigeration machine with a screw compressor and a liquid pump before the throttling devices,
which allows it to work at a decreased condensation pressure. The dependences of changes in net efficiency, cooling
capacity, power consumption and cooling coefficient at full and partial capacity with co-regulation of cooling capacity
and geometric compression ratio are given. The experimental and calculated characteristics of a screw compressor
operating with R22 freon are used.

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Author Biographies

Anatoliy Nikolaevich Noskov, ITMO University, Russia, Saint Petersburg

Doctor of Technical Sciences, Professor, Associate Professor of Low- Temperature Energy Department.

Maria Shaposhnikova, ITMO University, Russia, Saint Petersburg

Graduate Student of Low- Temperature Energy Department.

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Abstract views: 12

Published

2020-10-20

How to Cite

Noskov А. Н., & Shaposhnikova М. (2020). Features of refrigeration screw compressor operation at ambient temperature decrease. Omsk Scientific Bulletin. Series «Aviation-Rocket and Power Engineering», 4(3), 9–14. https://doi.org/10.25206/2588-0373-2020-4-3-9-14

Issue

Vol. 4 No. 3 (2020)

Section

Power and chemical engineering

License

Non-exclusive rights to the article are transferred to the journal in full accordance with the Creative Commons License BY-NC-SA 4.0 «Attribution-NonCommercial-ShareAlike 4.0 Worldwide License (CC BY-NC-SA 4.0»)

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