Publication detail

Synthesis of Rankine cycle systems with cascade and separate configurations utilising multiple heat sources at different temperature levels

Dokl, Monika Gomilsek, Rok Varbanov, Petar Sabev Van Fan, Yee Kravanja, Zdravko Cucek, Lidija

English title

Synthesis of Rankine cycle systems with cascade and separate configurations utilising multiple heat sources at different temperature levels

Type

journal article in Web of Science

Language

en

Original abstract

The optimisation of Rankine cycle systems is mainly influenced by the type of heat source, working fluid selection, process components, control strategy, component layout and sizing, and has been recognised as a promising way to contribute to the development of renewable and sustainable energy systems. In this study, a combined steam-organic Rankine system is proposed to recover waste heat from aluminium production at various temperature levels and heat from solar, geothermal and biomass renewable sources. Based on a case study in a Slovenian city, the operating conditions of two different configurations are optimised for individually positioned cycles and for a cascade design of these cycles. The process design and its characteristics are captured in a flowsheet structure formulated with a non-linear programming model and solved in GAMS. The comparison of the optimal performance of the studied systems shows the better performance of the separate design, generating a total power of more than 1.6 MW, while in cascade design 11.4% less power is produced. The flexibility and adaptability of the system to different energy sources are investigated and the trade-offs associated with different system configurations are discussed.

English abstract

The optimisation of Rankine cycle systems is mainly influenced by the type of heat source, working fluid selection, process components, control strategy, component layout and sizing, and has been recognised as a promising way to contribute to the development of renewable and sustainable energy systems. In this study, a combined steam-organic Rankine system is proposed to recover waste heat from aluminium production at various temperature levels and heat from solar, geothermal and biomass renewable sources. Based on a case study in a Slovenian city, the operating conditions of two different configurations are optimised for individually positioned cycles and for a cascade design of these cycles. The process design and its characteristics are captured in a flowsheet structure formulated with a non-linear programming model and solved in GAMS. The comparison of the optimal performance of the studied systems shows the better performance of the separate design, generating a total power of more than 1.6 MW, while in cascade design 11.4% less power is produced. The flexibility and adaptability of the system to different energy sources are investigated and the trade-offs associated with different system configurations are discussed.

Keywords in English

Multiple heat sources; Organic Rankine cycle; Separate and cascade designs; Steam Rankine cycle; Thermodynamic optimisation

Released

01.12.2023

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

ISSN

0360-5442

Number

284

Pages count

16

BIBTEX


@article{BUT187499,
  author="Petar Sabev {Varbanov} and Yee Van {Fan},
  title="Synthesis of Rankine cycle systems with cascade and separate configurations utilising multiple heat sources at different temperature levels",
  year="2023",
  number="284",
  month="December",
  publisher="PERGAMON-ELSEVIER SCIENCE LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",
  address="
PERGAMON-ELSEVIER SCIENCE LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND",
  issn="0360-5442"
}