Share
IIR document
Mathematical modeling of the phase transition processes with metastability effects for transcritical R744 converging-diverging nozzles .
Number: pap. n. 195
Author(s) : BANASIAK K., HAFNER A.
Summary
The effects of metastability in the phase transition processes for the transcritical R744 converging-diverging nozzles were investigated in this study. The research comprised both numerical simulations and experimental measurements, performed for the operating conditions typical for a R744 heat pump. The computational approach utilized the Delayed Equilibrium Model based on superposition of the homogeneous and heterogeneous nucleation. The research was performed at the test facility specially designed for experimental investigation of the small-scale, ejector-equipped heat pumps. Based on the results for a sample conical geometry, the authors developed and validated a correlation equation for the nucleation work reduction factor. Once validated, the model proved to yield acceptably low discrepancies between the simulation and the experimental results, also for other nozzle geometries.
Available documents
Format PDF
Pages: 8 p.
Available
Public price
20 €
Member price*
Free
* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).
Details
- Original title: Mathematical modeling of the phase transition processes with metastability effects for transcritical R744 converging-diverging nozzles .
- Record ID : 30004417
- 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
Links
See other articles from the proceedings (142)
See the conference proceedings
Indexing
-
Themes:
Heat pumps techniques;
Thermodynamics and changes of state;
CO2 - Keywords: Nozzle; R744; Simulation; Heat pump; Expérimentation; Transcritical cycle; Change of phase; CO2
-
CFD simulation of supercritical carbon dioxide ...
- Author(s) : SAHU K. D., YADAV S. S., DASGUPTA M. S.
- 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
View record
-
Investigation of non-equilibrium effects during...
- Author(s) : LOG A. M., MUNKEJORD S. T., HAMMER M., HAFNER A., DENG H., AUSTEGARD 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
View record
-
Accordance between a mathematical simulation mo...
- Author(s) : JARDEBY A., NORDMAN R., ROLFSMAN L., et al.
- Date : 2012/06/25
- Languages : English
- Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
- Formats : PDF
View record
-
Finite elements based solution for heat transfe...
- Author(s) : ISMAIL K. A. R., GONCALVES M. M., SCALON V. L.
- Date : 1996/05/29
- Languages : English
- Source: Proceedings of the 2nd European Thermal-Sciences (EUROTHERM) and 14th UIT National Heat Transfer Conference 1996.
View record
-
Carbon dioxide as a possible low temperature re...
- Author(s) : GERMANUS J., RÖLLIG P.
- Date : 2017/05/11
- Languages : English
- Source: 7th Conference on Ammonia and CO2 Refrigeration Technology. Proceedings: Ohrid, North Macedonia, May 11-13, 2017.
- Formats : PDF
View record