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CO2 has a high volumetric capacity and a good heat transfer performance but a disadvantage in terms of the coefficient of performance (COP) at high gas cooler temperatures. The reasons are the thermodynamic losses during the throttling process and the high discharge temperatures. The high pressure levels in such a system are a further disadvantage. In our laboratory a piston expander-compressor-unit has been developed and tested to improve the CO2 system COP. Our latest prototype has been integrated in two supermarket refrigeration systems. These first field tests started in a Swiss cash & carry market as well as in an experimental plant with a demo market. In this publication operational experiences and test results at suband transcritical conditions are presented.
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Details
- Original title: CO2 expander-compressor-unit (ECU) in refrigeration systems.
- Record ID : 30004432
- Languages: English
- Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
- Publication date: 2012/06/25
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Indexing
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COP improvement of a CO2 refrigeration system w...
- Author(s) : WENZEL M., HESSE U.
- Date : 2012/07/16
- Languages : English
- Source: 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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Assessment of energy efficiency and operating p...
- Author(s) : HUDJETZ S., KOHLER P., BECKER M.
- Date : 2020/12/07
- Languages : English
- Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
- Formats : PDF
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Energy analysis of CO2 refrigeration systems us...
- Author(s) : DUGARIA S., CALABRESE L., AZZOLIN M., et al.
- Date : 2018/06/18
- Languages : English
- Source: 13th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2018). Proceedings. Valencia, Spain, June 18-20th 2018.
- Formats : PDF
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Effect of the operating conditions on a transcr...
- Author(s) : DOERFFEL C., TANNERT T., HESSE U.
- Date : 2019/04/11
- Languages : English
- Source: 8th Conference on Ammonia and CO2 Refrigeration Technology. Proceedings: Ohrid, North Macedonia, Avril 11-13, 2019.
- Formats : PDF
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Integration of supermarket’s CO2 refrigeration ...
- Author(s) : KARAMPOUR M., MATEU-ROYO C., ROGSTAM J., et al.
- Date : 2019/08/24
- Languages : English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Formats : PDF
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