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Roskosch, Dennis ; Venzik, Valerius ; Atakan, Burak:
Thermodynamic model for reciprocating compressors with the focus on fluid dependent efficiencies.
In: International Journal of Refrigeration.
Bd. 84
(2017)
.
- S. 104-116.
ISSN 1879-2081
DOI: https://doi.org/10.1016/j.ijrefrig.2017.08.011
Abstract
Fluids with high global warming potential, which are used in existing refrigeration cycles and heat pumps, will have to be replaced soon by less harmful fluids, but the fluid selection is difficult especially due to the unknown compressor performance. In this work a differential compressor model for reciprocating compressors is introduced which predicts volumetric and isentropic efficiencies quickly and can be easily fitted with measured data at only one operation point of an existing compressor. In order to characterise the influence of different fluids two semi-physical correlations for the valve flows are fitted here, and a procedure of transferring them to different compressors is shown. The model is validated on, in total, 63 measured points based on numerous fluids from one semi-hermetic reciprocating compressor which is part of a heat pump cycle. The calculations lead to mean prediction errors of 3.0% for the isentropic and 2.3% for the volumetric efficiency.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | Reciprocating compressors; Thermodynamic model; Semi-physical model; Heat pumps; Refrigerators |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 05 Okt 2026 06:12 |
| Letzte Änderung: | 05 Okt 2026 06:12 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/99579 |