OPTIMIZATION OF LIQUID ASU OF MEDIUM PRODUCTIVITY WITH SIMULTANEOUS DEVELOPING OF AN EFFECTIVE TWO-SHAFT EXPANDER-COMPRESSOR UNIT
DOI:
https://doi.org/10.18198/j.ind.gases.2014.0738Keywords:
Liquid oxygen, Air separation unit, Expander-compressor unit, Expander stage, Compressor stage, Impeller, Specific energy consumptionAbstract
There is a growing demand for liquid oxygen. In order to reduce the cost of its production in an air separation unit (ASU) of medium productivity a two-shaft expander-compressor unit (ECU) is proposed to use. To increase its effectiveness in ECU a turbo reducer is used which reduces the rotation frequency of the compressor stage (CS) up to its optimal value comparatively to the rotation frequency of the expander stage (ES). The results of a modal and structural optimization of ASU and ECU used in it have been presented. As a result, the specific energy consumption for the production of liquid oxygen can be reduced from 1,17 to 1,06 kWh/kg compared to the basic ASU. 3D-models of CS and ES impellers forming part of the two-shaft ECU have been presented.
References
Lavrenchenko G.K., Plesnoy A.V. (2012). Cost reduction energy to produce liquid products in ASP medium pressure with expander-compressor units// Tekhnicheskie Gazy. [Industrial Gases]. — № 5. — P. 21-28. (Rus.).
Lavrenchenko G.K., Plesnoy A.V. (2013). Reducing specific energy consumption of medium pressure and small-tonnage air separation plants// Vostochno-yevropeyskiy Zhurnal Peredovykh Tekhnologiy. [Eastern-European Journal of Enterprise Tehnologies]. — № 5/8 (65). — P. 29-34. (Rus.).
Barzdaitis V., Maћeika P. (2010). Diagnostics practice of heavy duty high speed gear transmissions// Mechanika. — No. 1. — P. 58-61.
Lavrenchenko G.K., Plesnoy A.V. (2013). Optimization of a two-shaft detendre compressor unit with simultaneous improvement of air-separating installations of medium productivity// Tekhnicheskie Gazy. [Industrial Gases]. — № 2. — P. 15-23. (Rus.).
Lavrenchenko G.K., Plesnoy A.V. (2013). Working out the flowing part of the compressor stage for an expander-compressor unit of two-shaft design in medium pressure ASU structure// Tekhnicheskie Gazy. [Industrial Gases]. — № 3. — P. 26-32. (Rus.).
Lavrenchenko G.K., Plesnoy A.V. (2013). Increasing the efficiency of the gas-expansion machine-compressor units used in the structure of the air-separating unit of medium pressure// Tekhnicheskie Gazy. [Industrial Gases]. — № 4. P. 18-23. (Rus.).
Davyidov A. B., Kobulashvili A.Sh., Sherstyuk A.N. (1987). Calculation and design of turbine expanders. — Moskow: Mashinostroenie. — 231 p. (Rus.).
Taran V.N. (2003) Prediction of the cryogenic turbo expander characteristics// Tekhnicheskie Gazy. [Industrial Gases]. — № 4. — P. 28-38. (Rus.).
Seleznev K.P., Galerkin Y.B. (1982). Centrifugal compressors. — Leningrad.: Mashinostroenie.— 271 p. (Rus.).
Chistyakov F.M., Ignatenko V.V., Romanenko N.T., Frolov E.S. (1969). Centrifugal compressor machines. — Moskow: Mechanical Engineering. — 328 p. (Rus).
Krain H. (2002). Unsteady Diffuser Flow in a Transonic Centrifugal Compressor //Int. Journal of Rotating Machinery. — V. 8. — No. 3. — P. 223-231.
Krain H., Hoffmann B. (2008). Flow Study of a Redesigned High-Pressure-Ratio Centrifugal Compressor// Journal of Propulsion and Power. — V. 24. — No. 5. — P. 1117-1123.
Bulot N., Trebinjac I. (2008). Effect of the unsteadiness on the diffuser flow in a transonic centrifugal compressor stage// Int. Journal of Rotating Machinery. — Article ID 932593. — P. 1-11.
Fleming R., Lou F., Key N. L. (2011). The Development of a High Speed Centrifugal Compressor Research Facility //49th AIAA Aerospace Sciences Meeting. — V. 7. — P. 4-7.
Downloads
Issue
Section
License
LICENSE AGREEMENT
After receiving an article for publication as required revision scientometric databases each author directs the license agreement on the assignment and transfer of the management of copyright. Signatures of the author (s) it is desirable to seal the personnel department of the institution where the author works (authors), or the seal of the Faculty.
Revision refers to the authors one layout for proofreading. Permissible only those fixes that result in compliance with the layout of the original text of the article. Significant changes are not permitted. Layout should be sent to the editorial office within days of receipt.
