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Alexopoulos, Charalampos ; Aljolani, Osama Atef Ishaq ; Heberle, Florian ; Roumpedakis, Tryfon C. ; Brüggemann, Dieter ; Karellas, Sotirios:
Design Evaluation for a Finned-Tube CO2 Gas Cooler in Residential Applications.
In: Energies.
Bd. 13
(2020)
Heft 10
.
- 2428.
ISSN 1996-1073
DOI: https://doi.org/10.3390/en13102428
Abstract
Towards the introduction of environmentally friendlier refrigerants, CO2 cycles have gained significant attention in cooling and air conditioning systems in recent years. In this context, a design procedure for an air finned-tube CO2 gas cooler is developed. The analysis aims to evaluate the gas cooler design incorporated into a CO2 air conditioning system for residential applications. Therefore, a simulation model of the gas cooler is developed and validated experimentally by comparing its overall heat transfer coefficient. Based on the model, the evaluation of different numbers of rows, lengths, and diameters of tubes, as well as different ambient temperatures, are conducted, identifying the most suitable design in terms of pressure losses and required heat exchange area for selected operational conditions. The comparison between the model and the experimental results showed a satisfactory convergence for fan frequencies from 50 to 80 Hz. The absolute average deviations of the overall heat transfer coefficient for fan frequencies from 60 to 80 Hz were approximately 10%. With respect to the gas cooler design, a compromise between the bundle area and the refrigerant pressure drop was necessary, resulting in a 2.11 m2 bundle area and 0.23 bar refrigerant pressure drop. In addition, the analysis of the gas cooler’s performance in different ambient temperatures showed that the defined heat exchanger operates properly, compared to other potential gas cooler designs
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse > Lehrstuhl Technische Thermodynamik und Transportprozesse - Univ.-Prof. Dr.-Ing. Dieter Brüggemann Profilfelder > Emerging Fields > Energieforschung und Energietechnologie Forschungseinrichtungen > Forschungsstellen > Zentrum für Energietechnik - ZET Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften Profilfelder Profilfelder > Emerging Fields Forschungseinrichtungen Forschungseinrichtungen > Forschungsstellen |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 14 Mai 2020 06:43 |
| Letzte Änderung: | 28 Jul 2023 09:40 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/55157 |