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R744 cooling technology at ultra-low temperature.
Number: 0520
Author(s) : BLUST S., BARROCA P., HANF P., PETAGNA P., VERLAAT B., HAFNER A.
Summary
To cool down the detectors, ATLAS and CMS, at CERN, a R744 refrigeration system is needed operating at ultra -low temperature region while coping with large load demand (up to 550 kW). The silicon sensors must be kept cool below -35 ℃ to avoid thermal runaway, leading to evaporation temperatures of the system below -50 ℃. Furthermore, the detectors are located about 100 m below surface leading to large elevations, as the gas cooler are located on surface and the evaporators underground. A trans-critical demonstration plant is developed, complying with the above requirements and achieving 70 kW cooling capacity, to analyse the refrigerants behaviour inside the long vertical and horizontal pipelines and the oil management. In addition, a simulation model is designed. This paper describes the development of the model and presents first analysis results.
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Details
- Original title: R744 cooling technology at ultra-low temperature.
- Record ID : 30031805
- Languages: English
- Subject: Technology
- Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
- Publication date: 2023/08/21
- DOI: http://dx.doi.org/10.18462/iir.icr.2023.0520
Links
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Indexing
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Themes:
CO2;
Other industrial applications - Keywords: R744; Cascade system; Transcritical cycle; Simulation; CO2; Low temperature; Particle detector
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R744 modular refrigeration technology at -50℃.
- Author(s) : BLUST S., BARROCA P. A. C., PETAGNA P., HANF P., HAFNER A.
- Date : 2022/06/13
- Languages : English
- Source: 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022.
- Formats : PDF
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Development of pumped CO2 systems fo...
- Author(s) : VERLAAT B., PETAGNA P., ZWALINSKI L., DAGUIN J., GIAKOUMI D., BHANOT V., COLLOT J., LATIL S., POSTEMA H., TROPEA P., DAVOINE L., FERNANDEZ GARCIA M., HULEK W., SCHMID D.
- 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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Performance and operation limits of a Remote Ul...
- Author(s) : BARROCA P., HAFNER A., KUCZYNSKI K., HANF P., VERLAAT B.
- Date : 2023/08/21
- Languages : English
- Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
- Formats : PDF
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Evaporative cooling system with natural refrige...
- Author(s) : BARROCA P., HAFNER A., PARDINAS A., VERLAAT B., ZWALINSKI L., HULEK W., PETAGNA P., HANF P., BATTISTIN 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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An advance Krypton – CO2 cascade ref...
- Author(s) : CONTIERO L., HAFNER A., VERLAAT B., BANASIAK K., ALLOUCHE Y.
- Date : 2023/04/27
- Languages : English
- Source: 10th IIR Conference on Ammonia and CO2 Refrigeration Technologies.
- Formats : PDF
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