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High temperature heat pump using HFO and HCFO refrigerants – system design and experimental results.
Number: pap. n. 242
Author(s) : ARPAGAUS C., KUSTER R., PRINZING M., et al.
Summary
High temperature heat pumps (HTHP) with heat sink temperatures of 100 to 160 °C will increasingly become commercialized in the coming years, especially for industrial drying, sterilization and evaporation processes. In particular, the HFO R1336mzz(Z) and the HCFOs R1233zd(E) & R1224yd(Z) are low GWP (< 10) replacement refrigerants for R245fa and R365mfc. This study examines the experimental performance of R1336mzz(Z) and R1233zd(E) in a laboratory HTHP with 5 to 10 kW heating capacity. The developed heat pump is single-stage, operates with a variable speed piston compressor, and contains a continuously adjustable internal heat exchanger (IHX) for superheating control. The performance data were measured at 30, 50, and 70 K temperature lift (40 to 80°C heat source, 80 to 150°C heat sink). At W60/W110 the experimental results with R1233zd(E) showed a COP of 2.8 (basic cycle) and 3.1 with IHX integration (+15%). For R1336mzz(Z) a COP of 2.4 and 3.0 was reached (+24%). At higher temperatures tested, the deviations between the measured COP with R1336mzz(Z) and R1233zd(E) were within the measurement uncertainty. Moreover, R1336mzz(Z) achieves potentially higher condensing temperatures due to its higher critical temperature. By increasing the heat sink temperature glide from 5 to 30 K, a further 15% COP increase was achieved.
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Format PDF
Pages: 9
Available
Public price
20 €
Member price*
Free
* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).
Details
- Original title: High temperature heat pump using HFO and HCFO refrigerants – system design and experimental results.
- Record ID : 30026436
- Languages: English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Publication date: 2019/08/24
- DOI: http://dx.doi.org/10.18462/iir.icr.2019.0242
- Notes:
PowerPoint presentation included to this paper.
Links
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See the conference proceedings
Indexing
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Themes:
HCFCs;
HFCs;
Industrial heat pumps;
HFO et HCFO - Keywords: Industrial application; Measurement; R1336mzz(Z); R1233zd(E); Heat pump; HFO; HCFO; High temperature; Testing; COP
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