THERMODYNAMIC ANALYSIS OF CRYOGENIC AIR SEPARATION

Authors

  • Георгий Константинович Лавренченко Одесская государственная академия холода, ул. Дворянская, 1/3, г. Одесса, Украина, 65082, Ukraine
  • 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.2012.0592

Keywords:

Air, Oxygen, Nitrogen, Column, Rectification, Irreversibility, Exergy loss, Minimum work of separation, Entropy, Exergy efficiency

Abstract

There is a growth of interest in entropy method of thermodynamic analysis. On its basis investigated characteristics of cryogenic air separation. As an object is selected air separation unit (ASU) with a single column rectification. The values of the exergy losses in key elements of ASU are determined. The process the output of several expressions for the minimum work of air separation sets out. The thermodynamic model is proposed to explain the processes implemented with the reversible air separation to produce pure oxygen and nitrogen gases or with impurities of each other. The analysis is made of losses in a single rectifiation column. It is shown that the main contribution to the loss making irreversible heat transfer in the evaporator of the column.

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

Научно-технический и производственный журнал

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Issue

No. 1 (2012): Технические газы

Section

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

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