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Cited by 16Phase Equilibria and ThermodynamicsThermodynamic and Exergetic Analyses of Power and Cooling SystemsRefrigeration and Air Conditioning Technologies

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A computational drop-in assessment of hydrofluoroethers in Organic Rankine Cycles

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Jovell, Daniel, Gonzalez-Olmos, Rafael, Llovell, Fèlix·2022·Energy
DOI 10.1016/j.energy.2022.124319
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Abstract

Organic Rankine Cycles (ORCs) are experiencing a growing interest due to their ability to generate electricity from residual low waste heat sources. HFC-245fa is a representative working fluid for ORC applications, but it has recently been phased-out in new equipment because of its high global warming potential (GWP). In this work, the soft-SAFT molecular-based equation of state is used to evaluate the capacity of nine promising low-GWP hydrofluoroethers (HFEs) as alternative working fluids in ORC applications using different key performance indicators focused on energy efficiency and service fluids consumption. The thermodynamic model has been employed to characterize these fluids by describing saturated densities, vapor pressure, surface tension, temperature-enthalpy, and temperature-entropy diagrams, including further validation with binary mixtures. Then, based on technical criteria focused on the thermal efficiency and working and service fluids consumption, the soft-SAFT model has been used to conduct a feasibility study of HFEs as direct substitutes for HFC-245fa in such applications. Although pure fluids can not reach the same efficiency as the benchmark, HFE-356mmz, HFE-7000, and HFE-7100 appear as promising replacements, capable of approaching system requirements operating at low pressure with low cooling water and heating fluid flow rates, while exhibiting lower GWP values.

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References 70 · Cited by 16

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Metadata

Authors
Jovell, D., Gonzalez-Olmos, R., & Llovell, F.
Affiliations
  • Institut Químic de Sarrià (ES)
  • Universitat Rovira i Virgili (ES)
Corresponding author
Llovell, Fèlix
ORCID
Venue
Energy
Publisher
Elsevier BV
Published
2022-09
Volume
254
Pages
124319
ISSN
0360-5442 (ISSN-L)
DOI
10.1016/j.energy.2022.124319
OpenAlex
W4280496094
Cited by
16
References
70
Citations by year
2026: 1 · 2025: 3 · 2024: 2 · 2023: 8 · 2022: 2
FWCI
1.07
Type
journal article
Language
en
Open access
Licence
Locations
  • Energy (publishedVersion, cc-by-nc)
  • SSRN Electronic Journal (publishedVersion)
  • DAU - Digital Archive of URL (submittedVersion, cc-by-nc)
  • Rovira & Virgili repository (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Generalitat de Catalunya (2017-SGR-1016)
  • Ministerio de Ciencia e Innovación
  • Gobierno de España Ministerio de Ciencia e Innovación (PID2019-108014RB-C21)
Topics
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Phase Equilibria and Thermodynamics
  • Physical Sciences › Engineering › Mechanical Engineering › Thermodynamic and Exergetic Analyses of Power and Cooling Systems
  • Physical Sciences › Engineering › Mechanical Engineering › Refrigeration and Air Conditioning Technologies
Keywords
organic Rankine cycle, hydrofluoroethers, R245fa, working fluid selection, low global warming potential, thermodynamic properties, binary mixtures, waste heat recovery, thermal efficiency, HFE-7000, HFE-7100

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