INDICATORS ANALYSIS OF LOW PRESSURE AIR LIQUEFIER. 2. CYCLES WITH EXPANDER-COMPRESSOR UNITS

Authors

  • Георгий Константинович Лавренченко Одесская государственная академия холода, ул. Дворянская, 1/3, г. Одесса, Украина, 65082, Ukraine https://orcid.org/0000-0002-8239-7587
  • Александр Васильевич Плесной Одесская государственная академия холода, ул. Дворянская, 1/3, г. Одесса, Украина, 65082, Ukraine https://orcid.org/0000-0002-2127-2991

DOI:

https://doi.org/10.18198/j.ind.gases.2011.0573

Keywords:

Cycle of low pressure, Scheme air liquefier, Aggregate expander-compressor, Mathematical model, Heat exchange realizability, Entropy method, Coefficient of liquefaction, Exergy efficiency

Abstract

Cycles with low pressure of processed air are a basis for creation highly effective large-capacity air separation units (ASU). Feature of the such ASU is the use of the expander in a compressor step, which is mechanically connected with it. The application aggregates expander-compressor and special booster compressors causes work of the modern ASU on cycles with several pressures. Three variants of the aggregates expander-compressor schemes are considered. For an establishment of some the general patterns the thermodynamic analysis is carried out of low-pressure air liquefier characteristics. The closed mathematical models of three-liquefier are developed, exergy losses in internally irreversible processes are defined. The entropy method of thermodynamic analysis was used. The most effective had appeared liquefiers with a booster of an expander air stream before its expansion or with booster a stream having a pressure below atmospheric pressure to suction pressure in the main compressor.

Author Biographies

Георгий Константинович Лавренченко, Одесская государственная академия холода, ул. Дворянская, 1/3, г. Одесса, Украина, 65082

G.K. Lavrenchenko

Александр Васильевич Плесной, Одесская государственная академия холода, ул. Дворянская, 1/3, г. Одесса, Украина, 65082

A.V. Plesnoy

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Issue

No. 5 (2011): Industrial Gases

Section

PROCESSES, CYCLES, SCHEMES AND THE EQUIPMENT OF REFRIGERATION AND CRYOGENIC SYSTEMS

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