Korean Journal of Chemical Engineering

The Korean Institute of Chemical Engineers (한국화학공학회)
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Optimization of compression ratio in closed-loop CO2 liquefaction process

  • Park, Taekyoon (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Kwak, Hyungyeol (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Kim, Yeonsoo (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University) ;
  • Lee, Jong Min (School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University)
  • Received : 2018.04.30
  • Accepted : 2018.07.26
  • Published : 2018.11.30
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Abstract

We suggest a systematic method for obtaining the optimal compression ratio in the multi-stage closed-loop compression process of carbon dioxide. Instead of adopting the compression ratio of 3 to 4 by convention, we propose a novel approach based on mathematical analysis and simulation. The mathematical analysis prescribes that the geometric mean is a better initial value than the existing empirical value in identifying the optimal compression ratio. In addition, the optimization problem considers the initial installation cost as well as the energy required for the operation. We find that it is best to use the fifth stage in the general closed-loop type carbon dioxide multi-stage compression process.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF), Engineering Development Research Center (EDRC)

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