Publication detail

A new strategy for mixed refrigerant composition optimisation in the propane precooled mixed refrigerant natural gas liquefaction process

Zhang, Shouxin Zou, Zimo Klemes, Jiri Jaromir Varbanov, Petar Sabev Shahzad, Khurram Ali, Arshid Mahmood Wang, Bo-Hong

Original Title

A new strategy for mixed refrigerant composition optimisation in the propane precooled mixed refrigerant natural gas liquefaction process

Type

journal article in Web of Science

Language

English

Original Abstract

The natural gas liquefaction process occupies a considerable part of the energy consumption in the LNG industry chain, and efficient optimisation methods should be developed to improve the economic and environmental performances of this process. In this work, a new optimisation strategy based on the particle swarm optimisation (PSO) algorithm and bisection method was developed to optimise the propane precooled refrigerant process (C3MR). In the proposed optimisation strategy, the molar fractions of the mixed refrigerant (MR) components were directly adopted as variables in the PSO algorithm, and the MR flow rate was independently adjusted by the bisection method to satisfy the minimum temperature approach constraints. The results show that the optimal operating conditions reduced the energy requirement of the C3MR process by 4% and decreased the consumption of MR by 31.9%, compared to traditional using the flow rates of MR components as variables. The correlations among the properties of key streams were calculated based on the intermediate results of the proposed method and visualised with the heat map. The results show that the energy requirement of the C3MR process decreased with the increase of the low boiling temperature components and increased with the high boiling temperature components of MR.

Keywords

Energy efficiency; Mixed refrigerant composition; Natural gas liquefaction; Optimisation; Propane precooled mixed refrigerant

Authors

Zhang, Shouxin; Zou, Zimo; Klemes, Jiri Jaromir; Varbanov, Petar Sabev; Shahzad, Khurram; Ali, Arshid Mahmood; Wang, Bo-Hong

Released

1. 7. 2023

Publisher

PERGAMON-ELSEVIER SCIENCE LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

Location

PERGAMON-ELSEVIER SCIENCE LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

ISBN

0360-5442

Periodical

Energy

Year of study

274

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages count

14

URL

https://www.sciencedirect.com/science/article/pii/S0360544223007181?via%3Dihub

BibTex

@article{BUT187462,
  author="Zhang, Shouxin and Zou, Zimo and Klemes, Jiri Jaromir and Varbanov, Petar Sabev and Shahzad, Khurram and Ali, Arshid Mahmood and Wang, Bo-Hong",
  title="A new strategy for mixed refrigerant composition optimisation in the propane precooled mixed refrigerant natural gas liquefaction process",
  journal="Energy",
  year="2023",
  volume="274",
  number="1",
  pages="14",
  doi="10.1016/j.energy.2023.127324",
  issn="0360-5442",
  url="https://www.sciencedirect.com/science/article/pii/S0360544223007181?via%3Dihub"
}