Transcritical CO2 cycle with high-performance expansion: design and tests.

Transkritischer CO2-Process mit arbeitsleistender Entspannung: Betribserfahrungen und Versuchsergebnisse.

Summary

The authors present the results they have obtained in research on high-performance expansion performed at the Technical University of Dresden; a CO2 test system using a transcritical cycle was employed. The original feature of this test installation is a two-process system ensuring high-performance expansion and compression, at second-stage level, of gaseous CO2 exiting the first stage, followed by intermediary cooling. This free-piston system is completely independent from the compression process occurring in the first stage. It makes use of energy of expansion. The article demonstrates that experimental studies confirm the feasibility of the system and the principle of the expansion-compression system involving compression at 2nd-stage level alone. The calculated performances and those previously published (see Bulletin of the IIR, reference 2000-0079) are very similar and the results obtained encourage continuing research in order to perfect and simplify the system.

Details

Original title: Transkritischer CO2-Process mit arbeitsleistender Entspannung: Betribserfahrungen und Versuchsergebnisse.
Record ID : 2001-1209
Languages: German
Source: DKV-Tagungsbericht 26. 1999, Berlin.
Publication date: 1999/11/17
Document available for consultation in the library of the IIR headquarters only.

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Indexing

Themes: CO2;
Containment, refrigerant charge reduction
Keywords: Energy; Recovery; Performance; Testing; Expansion; Refrigerant; CO2