Multi-compressor refrigeration units. Oil distribution problems

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Abstract

When the number of compressors running in parallel is equal to or greater than four, or when the compressors have different capacities (although parallel connection of compressors of different capacities and designs must be avoided), or the amount of oil returned is unknown, an oil level regulator (OLR) and oil separator (OS) system is preferable. With this system, the difference in pressure inside the crankcase of each compressor has no effect on oil level stabilization.

About the authors

V. V. Shishov

Bauman Moscow State Technical University

Author for correspondence.
Email: info@eco-vector.com
Russian Federation, Moscow

E. V. Fursov

Bauman Moscow State Technical University

Email: info@eco-vector.com
Russian Federation, Moscow

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2. Fig. 1. Schematic diagram of a system with oil level control

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3. Fig. 2. Multicompressor chiller unit with oil level regulators: 1 - oil pipeline; 2 - pressure relief line; 3 - pressure differential valve; 4 - oil collector (MC); 5 - oil return line; 6 - oil level regulator (LSR); 7 - connecting adapter; 8 - oil separator (OC); 9 - discharge line; 10 - check valve

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4. Fig. 3. Oil level control in satellite multi-compressor refrigeration units

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Copyright (c) 2003 Shishov V.V., Fursov E.V.

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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