On the systematic design and selection of optimal working fluids for Organic Rankine Cycles

Athanasios I. Papadopoulos, Mirko Stijepovic, Patrick Linke

Research output: Contribution to journalArticle

279 Citations (Scopus)

Abstract

This work presents the first approach to the systematic design and selection of optimal working fluids for Organic Rankine Cycles (ORCs) based on computer aided molecular design (CAMD) and process optimization techniques. The resulting methodology utilizes group contribution methods in combination with multi-objective optimization technology for the generation of optimum working fluid candidates. Optimum designs of the corresponding ORC processes are then developed for the comprehensive set of molecules obtained at the CAMD stage, in order to identify working fluids that exhibit optimum performance in ORCs with respect to important economic, operating, safety and environmental indicators. The proposed approach is illustrated with a case study in the design of working fluids for a low-temperature ORC system. Particular attention is paid to safety and environmental characteristics such as flammability, toxicity, ozone depletion and global warming potential. The methodology systematically identified both novel and conventional molecular structures that enable optimum ORC process performance.

Original languageEnglish
Pages (from-to)760-769
Number of pages10
JournalApplied Thermal Engineering
Volume30
Issue number6-7
DOIs
Publication statusPublished - May 2010

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Keywords

  • Environment
  • Molecular design
  • Multi-objective optimization
  • Organic Rankine Cycle
  • Working fluids

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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