Experimental investigation of enhanced CO₂ refrigeration systems at varying operating conditions
- Authors: Doerffel C.1, Barta R.B.1, Thomas C.1, Hesse U.1
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Affiliations:
- Technische Universität Dresden Institute of Power Engineering, Bitzer Chair of Refrigeration, Cryogenics and Compressor Technology Dresden
- Issue: Vol 112, No 4 (2023)
- Pages: 195-204
- Section: Original Study Articles
- URL: https://ogarev-online.ru/0023-124X/article/view/267760
- DOI: https://doi.org/10.17816/RF634610
- ID: 267760
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Abstract
The efficiency of a CO₂ refrigeration system depends mainly on the operating conditions and the system design. To increase the energy efficiency, advanced system designs include additional components and their combinations such as parallel compression, ejectors, and expansion machines. For a direct comparison of different system designs, measurements were performed on an advanced CO₂ laboratory refrigeration system at different operating conditions. The system behaviour was investigated at different gas cooler outlet temperatures, varying cooling loads, different evaporation temperatures and amounts of superheating. The results of the measurements performed on a baseline system configuration and advanced system designs are presented. It was observed that the influence of operating conditions is less important for certain measures in terms of efficiency improvement than for others. For each system design, operating conditions were identified under which a particularly advantageous behaviour of the respective measures was found. In the future, this will allow the judgment of the efficiency enhancement of each of different respective features for each individual application.
This article is a translation of the article by Doerffel C, Barta R, Thomas C, Hesse U. Experimental investigation of enhanced CO2 refrigeration systems at varying operating conditions. In: Proceedings of the 9th IIR Conference on the Ammonia and CO2 Refrigeration Technologies. Ohrid: IIF/IIR, 2021.
DOI: 10.18462/iir.nh3-co2.2021.0023 Published with the permission of the copyright holder.
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##article.viewOnOriginalSite##About the authors
Christian Doerffel
Technische Universität Dresden Institute of Power Engineering, Bitzer Chair of Refrigeration, Cryogenics and Compressor Technology Dresden
Author for correspondence.
Email: christian.doerffel@tu-dresden.de
Germany, Dresden
Riley B. Barta
Technische Universität Dresden Institute of Power Engineering, Bitzer Chair of Refrigeration, Cryogenics and Compressor Technology Dresden
Email: christian.doerffel@tu-dresden.de
ORCID iD: 0000-0002-8833-7411
Germany, Dresden
Christiane Thomas
Technische Universität Dresden Institute of Power Engineering, Bitzer Chair of Refrigeration, Cryogenics and Compressor Technology Dresden
Email: christian.doerffel@tu-dresden.de
ORCID iD: 0000-0003-3031-9138
Germany, Dresden
Ullrich Hesse
Technische Universität Dresden Institute of Power Engineering, Bitzer Chair of Refrigeration, Cryogenics and Compressor Technology Dresden
Email: christian.doerffel@tu-dresden.de
Germany, Dresden
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