Publication detail

A method for simultaneous retrofit of heat exchanger networks and tower operations for an existing natural gas purification process

Zhang, Y., Wang, B., Liang, Y., Yuan, M., Varbanov, P.S., Klemeš, J.J.

Original Title

A method for simultaneous retrofit of heat exchanger networks and tower operations for an existing natural gas purification process

Type

journal article - other

Language

English

Original Abstract

As an essential part of Heat Integration (HI), Heat Exchanger Networks (HENs) are widely used in large-scale industrial sites in the chemical industry. The interface temperatures (supply and target temperatures) of the HEN can change due to the adjustment of operating variables in the process. This paper proposes a new two-stage method for the simultaneous optimisation of the operating variables of the processing plants and the HEN of a natural gas purification process. In the first stage, a Particle Swarm Optimisation (PSO) algorithm is developed to minimise the total energy consumption. The variables representing the tower top pressure, tower bottom pressure, and reflux ratio are optimised, thereby changing the characteristics of the cold and hot streams in a HEN. In the second stage, a Shifted Retrofit Thermodynamic Grid Diagram (SRTGD)-based model and the corresponding solution approach are developed to retrofit the HEN. The objective function of the second stage is to minimise the total annual cost. The case study shows that the total energy consumption of the process is reduced by 41.5 % compared to the existing on-site process.

Keywords

Heat integrationHeat exchange network retrofitNatural gas purification processParticle swarm optimisation

Authors

Zhang, Y., Wang, B., Liang, Y., Yuan, M., Varbanov, P.S., Klemeš, J.J.

Released

4. 11. 2021

Publisher

Elsevier Ltd.

ISBN

2772-6711

Periodical

e-Prime - Advances in Electrical Engineering, Electronics and Energy

Number

1

State

Kingdom of the Netherlands

Pages from

100019

Pages to

100019

Pages count

11

URL

https://www.sciencedirect.com/science/article/pii/S2772671121000188

BibTex

@article{BUT176565,
  author="Bohong {Wang} and Petar Sabev {Varbanov} and Jiří {Klemeš}",
  title="A method for simultaneous retrofit of heat exchanger networks and tower operations for an existing natural gas purification process",
  journal="e-Prime - Advances in Electrical Engineering, Electronics and Energy",
  year="2021",
  number="1",
  pages="100019--100019",
  doi="10.1016/j.prime.2021.100019",
  issn="2772-6711",
  url="https://www.sciencedirect.com/science/article/pii/S2772671121000188"
}