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Roskosch, Dennis ; Venzik, Valerius ; Atakan, Burak:
A theoretical approach to identify optimal replacement fluids for existing vapour compression refrigeration systems and heat pumps.
In:
Heat Powered Cycles 2018 : Conference Proceedings. -
Bayreuth
,
2018
. - S. 389-396
ISBN 978-0-9563329-6-7
Abstract
The nowadays used working fluids for vapour compression refrigeration systems and heat pumps partly have a high global warming potential and will have to be replaced. This holds for systems in operation but also to a large number of existing cycle designs. Therefore, it would be very helpful if alternative working fluids for a given plant could be found which do not require a redesign of the system and which, in best case, also are more efficient. Although it seems possible to achieve this goal with modern process simulation tools, it remains unclear how detailed a concrete plant design must be modelled to obtain a reliable ranking of working fluids, useful for selection. In order to investigate this question a vapour compression heat pump test rig is simulated by thermodynamic models with different levels of complexity. The model results are compared among each other and to measured values for various fluids. It turns out that simple cycle calculations lead to incorrect results regarding the efficiency and thus are not sufficient to find replacement fluids for existing plants. The implementation of a compressor model significantly improves the simulation and leads finally to reliable fluid rankings. However, the information whether the heat exchangers are of sufficient size and whether the fluid is suited at all for a given task can only be obtained, as it turns out, by means of the most complex model which includes extensive models for the heat exchangers.
Weitere Angaben
| Publikationsform: | Aufsatz in einem Buch |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | Refrigerants; Retrofit; Process simulation; Replacement fluids |
| 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: | 06 Okt 2026 09:58 |
| Letzte Änderung: | 06 Okt 2026 09:58 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/99529 |