bei Google ScholarTitelangaben
Brendel, Leon P. M. ; Bernal, Silvan N. ; Hemprich, Carl ; Rowane, Aaron J. ; Bell, Ian H. ; Roskosch, Dennis ; Arpagaus, Cordin ; Bardow, André ; Bertsch, Stefan S.:
High-Glide Refrigerant Blends in High-Temperature Heat Pumps. Part 2. Inline Composition Determination for Binary Mixtures.
In: International Journal of Refrigeration.
Bd. 165
(2024)
.
- S. 45-57.
ISSN 1879-2081
DOI: https://doi.org/10.1016/j.ijrefrig.2024.05.012
Abstract
Refrigerant mixtures are frequently used in air-conditioners and heat pumps. However, mixtures with high glides of 30 K and more during evaporation are rare, partially because there is an increased concern about composition shifts within the system. An easy and reliable inline composition measurement could alleviate these concerns and simplify the handling of systems with high-glide mixtures. This study investigates six composition determination methods, which are all non-invasive, five of which can be conducted during system operation. All methods were applied to all available mixtures in a dataset of 380 data points. The binary and ternary mixtures tested consist of the refrigerants R-1233zd(E), R-1336mzz(Z), R-1234yf, R-1224yd(Z), and R-32. Each method was applied to all datapoints collected with a certain refrigerant mixture at varying operating conditions. The average of the calculated mass fraction was then compared to the manually charged mass fraction. For the density method, this difference of the calculated and measured mass fraction was always less than 0.03 and usually smaller than 0.01 across all tested mixtures. Most other methods performed well with deviations typically less than 0.05. Some of the methods require only low-cost sensors like thermocouples and pressure transducers. Property data of ternary mixtures is also discussed in the study but a composition determination, theoretically possible combining any two of the six methods, is not attempted in this study.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | High-temperature heat pump; composition determination; refrigerants; blends; mixtures; inline; online; pompe à chaleur haute température; détermination de la composition; réfrigérants; mélanges; en ligne |
| 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 13:28 |
| Letzte Änderung: | 05 Okt 2026 13:28 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/99536 |