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Experimental drop-in replacement of HFC-245fa by HCFO-1224yd(Z), a Low-GWP working fluid candidate for low-temperature Organic Rankine Cycles.

Number: 1163

Author(s) : AMAT-ALBUIXECH M., NAVARRO-ESBRÍ J.

Summary

The Organic Rankine Cycle (ORC) has gained prominence due to the urgent need to preserve the environment. This technology contributes to reduce the carbon footprint through the generation of electric power from renewable energy sources and low-grade waste heat. HFC-245fa is commonly used as working fluid in low-temperature ORCs, despite its zero Ozone Depletion Potential, its Global Warming Potential (GWP) is 858. With increasing restrictions on greenhouse gases, the price of those fluids with high GWP has risen. In this context, HCFO-1224yd(Z) has been recently presented as potential candidate for HFC-245fa replacement. Therefore, this work aims to experimentally test the suitability of using this low-GWP candidate in an existing low-temperature and small-scale HFC-254fa designed ORC. The drop-in replacement tests show similar behaviour between HFC-245fa and HCFO-1224yd(Z) and although HFC-245fa provides higher expander power output, net cycle efficiencies are similar, and several adjustments can be introduced to compensate the lower electrical output.

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Details

  • Original title: Experimental drop-in replacement of HFC-245fa by HCFO-1224yd(Z), a Low-GWP working fluid candidate for low-temperature Organic Rankine Cycles.
  • Record ID : 30027685
  • Languages: English
  • Subject: HFCs alternatives
  • Source: IIR Rankine Conference 2020.
  • Publication date: 2020/07/31
  • DOI: http://dx.doi.org/10.18462/iir.rankine.2020.1163

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