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Thermodynamic analysis of low GWP HFO and HCFO Refrigerants in HTHP with large temperature glides on the heat sink.

Number: 1166

Author(s) : DIEWALD K., ARPAGAUS C., HEBENSTREIT B.

Summary

High temperature heat pumps (HTHP) supplying process heat have a large application potential in the food, paper, and chemical industries. In this study, the low-GWP hydrofluoroolefins (HFO) and hydrofluorochloroolefins (HCFO) R1234ze(Z), R1336mzz(Z), R514A, R1233zd(E) and R1224yd(Z) are analysed as refrigerants in a single-stage IHX cycle, a two-stage extraction cycle (2SE) and a two parallel cycle (2CP). Achieving high temperature glides on the heat sink with supply 100 °C to 160 °C and 70 °C inlet temperature is a focus of the study. At 130 °C supply temperature, the COP of the 2SE and 2CP cycles improves around 2.5 % and 7.8 % respectively compared to the IHX cycle. R1336mzz(Z) provided the highest COP in all three cycles, however the lowest volumetric heating capacity (VHC). In both, the 2CP and the 2SE cycle,the exergy losses in the condenser are reduced compared to the IHX cycle.

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Pages: 9

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Details

  • Original title: Thermodynamic analysis of low GWP HFO and HCFO Refrigerants in HTHP with large temperature glides on the heat sink.
  • Record ID : 30027686
  • Languages: English
  • Subject: HFCs alternatives
  • Source: IIR Rankine Conference 2020.
  • Publication date: 2020/07/31
  • DOI: http://dx.doi.org/10.18462/iir.rankine.2020.1166

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