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A real column design exergy optimization of a cryogenic air separation unit

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  • Rizk, J.
  • Nemer, M.
  • Clodic, D.

Abstract

Distillation columns are one of the main methods used for separating air components. Their inconvenient is their high energy consumption. The distillation process is simulated in three types of columns and the exergy losses in the different parts calculated. A sensitivity analysis is realized in order to optimize the geometric and the operational parameters of each type of column. A comparative exergy analysis between the distillation columns considered for cryogenic air separation shows that the exergy efficiency of a double diabatic column, with heat transfer all through the length of the column, is 23% higher than that of the conventional adiabatic double columns.

Suggested Citation

  • Rizk, J. & Nemer, M. & Clodic, D., 2012. "A real column design exergy optimization of a cryogenic air separation unit," Energy, Elsevier, vol. 37(1), pages 417-429.
    • Handle: RePEc:eee:energy:v:37:y:2012:i:1:p:417-429
    DOI: 10.1016/j.energy.2011.11.012
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    References listed on IDEAS

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    1. Rivero, Ricardo, 2001. "Exergy simulation and optimization of adiabatic and diabatic binary distillation," Energy, Elsevier, vol. 26(6), pages 561-593.
    2. Jana, Amiya K., 2010. "Heat integrated distillation operation," Applied Energy, Elsevier, vol. 87(5), pages 1477-1494, May.
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    2. Sun, Jinsheng & Wang, Fan & Ma, Tingting & Gao, Hong & Liu, Yanzhen & Cai, Fang, 2012. "Exergy analysis of a parallel double-effect organosilicon monomer distillation scheme," Energy, Elsevier, vol. 47(1), pages 498-504.
    3. Muhammad Haris Hamayun & Naveed Ramzan & Murid Hussain & Muhammad Faheem, 2020. "Evaluation of Two-Column Air Separation Processes Based on Exergy Analysis," Energies, MDPI, vol. 13(23), pages 1-20, December.
    4. Mehrpooya, Mehdi & Moftakhari Sharifzadeh, Mohammad Mehdi & Rosen, Marc A., 2015. "Optimum design and exergy analysis of a novel cryogenic air separation process with LNG (liquefied natural gas) cold energy utilization," Energy, Elsevier, vol. 90(P2), pages 2047-2069.
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