Performance analysis and optimization of a new two-stage ejector-expansion transcritical CO2 refrigeration cycle.
Author(s) : YARI M.
Type of article: Article
Summary
In this paper, a new two-stage configuration of ejector-expansion transcritical CO2 (TRCC) refrigeration cycle is presented, which uses an internal heat exchanger and intercooler to enhance the performance of the new cycle. The theoretical analysis on the performance characteristics was carried out for the new cycle based on the first and second laws of thermodynamics. Based on the simulation results, it is found that, compared with the conventional two-stage transcritical CO2 cycle, the COP and second law efficiency of the new two-stage cycle are about 12.5-21% higher than that of conventional two-stage cycle. It is also concluded that, the performance of the new two-stage transcritical CO2 refrigeration can be significantly improved based on the presented new two-stage cycle. Hence the new two-stage refrigeration cycle is a promising refrigeration cycle from the thermodynamically and technical point of views. A regression analysis in terms of evaporator and gas cooler exit temperatures has been used, in order to develop mathematical expressions for maximum COP, optimum discharge and inter-stage pressures and entrainment ratio. [Reprinted with permission from Elsevier. Copyright, 2009].
Details
- Original title: Performance analysis and optimization of a new two-stage ejector-expansion transcritical CO2 refrigeration cycle.
- Record ID : 2010-0786
- Languages: English
- Source: International Journal of thermal Sciences - vol. 48 - n. 10
- Publication date: 2009/10
- DOI: http://dx.doi.org/10.1016/j.ijthermalsci.2009.01.013
Links
See other articles in this issue (1)
See the source
-
Options for a two-stage transcritical carbon di...
- Author(s) : HUFF H. J., HWANG Y., RADERMACHER R.
- Date : 2002/09/17
- Languages : English
- Formats : PDF
View record
-
Modeling of two-phase transcritical CO2 ejector...
- Author(s) : TASLIMI TALEGHANI S., SORIN M., PONCET S.
- Date : 2018/03
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 87
- Formats : PDF
View record
-
Regeneration of expansion energy by ejector in ...
- Author(s) : OZAKI Y., TAKEUCHI H., HIRATA T.
- Date : 2004/08/01
- Languages : English
- Source: Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
- Formats : PDF
View record
-
Performances d'une machine frigorifique transcr...
- Author(s) : BOUMARAF L., HABERSCHILL P., LALLEMAND A.
- Date : 2009/10
- Languages : French
- Source: Revue générale du Froid & du Conditionnement d'air - vol. 99 - n. 1097
View record
-
Computational fluid dynamics simulations of a t...
- Author(s) : KANBUR B. B., MARKUSSEN W. B., BUSCH A., KRIEZI E. E., KÆRN M. R., KRISTOFERSSON J., WALTHER J. H.
- Date : 2023/08/21
- Languages : English
- Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
- Formats : PDF
View record