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Thermodynamic analysis of low GWP HFO and HCFO Refrigerants in HTHP with large temperature glides on the heat sink
Hoval Aktiengesellschaft, Vaduz, 9490, Liechtenstein. NTB University of Applied Sciences of Technology, Buchs, 9471, Switzerland. FH Vorarlberg University of Applied Science, Dornbirn, 6850, Austria.
NTB University of Applied Sciences of Technology, Buchs, 9471, Switzerland.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. FH Vorarlberg University of Applied Science, Dornbirn, 6850, Austria.
2020 (English)In: IIR Rankine Conference 2020, IIF-IIR , 2020, article id 1166Conference paper, Published paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
IIF-IIR , 2020. article id 1166
Series
Refrigeration Science and Technology, ISSN 0151-1637
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-82597DOI: 10.18462/iir.rankine.2020.1166ISI: 001324906600041Scopus ID: 2-s2.0-85099251384OAI: oai:DiVA.org:ltu-82597DiVA, id: diva2:1520673
Conference
IIR Rankine 2020 Conference - Advances in Cooling, Heating and Power Generation, 27-31 July, 2020, Online
Note

ISBN för värdpublikation: 978-2-36215-038-8

Available from: 2021-01-21 Created: 2021-01-21 Last updated: 2024-12-17Bibliographically approved

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Hebenstreit, Babette

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