EN
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Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems
Abstract
In this study, difference of the expansion valve and expander usage in two-stage, transcritical R744 (CO2) refrigeration cycle was analyzed thermodynamically. Variable parameters on this study are gas cooler pressure, interstage pressure and evaporation temperature of refrigerant. Isentropic efficiency of the compressor is calculated by an empirical equation. COP and second law efficiency values of cycles are obtained by parametrical analysis. By using expander instead of expansion valve in the cycle, COP and second law efficiency values increase 10% averagely. Additionally, it is emphasized that there could be an optimum evaporation temperature concept, and the general approach for calculation of inter-stage pressure is a wrong practice for cycle efficiency
Keywords
Details
Primary Language
English
Subjects
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Journal Section
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Publication Date
June 1, 2014
Submission Date
June 1, 2014
Acceptance Date
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Published in Issue
Year 2014 Volume: 34 Number: 2
APA
Bayrakçı, H. C., Özgür, A. E., & Alan, A. (2014). Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems. Journal of Thermal Science and Technology, 34(2), 91-97. https://izlik.org/JA36YU67PW
AMA
1.Bayrakçı HC, Özgür AE, Alan A. Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems. Journal of Thermal Science and Technology. 2014;34(2):91-97. https://izlik.org/JA36YU67PW
Chicago
Bayrakçı, Hilmi Cenk, Arif Emre Özgür, and Abdullah Alan. 2014. “Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems”. Journal of Thermal Science and Technology 34 (2): 91-97. https://izlik.org/JA36YU67PW.
EndNote
Bayrakçı HC, Özgür AE, Alan A (June 1, 2014) Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems. Journal of Thermal Science and Technology 34 2 91–97.
IEEE
[1]H. C. Bayrakçı, A. E. Özgür, and A. Alan, “Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems”, Journal of Thermal Science and Technology, vol. 34, no. 2, pp. 91–97, June 2014, [Online]. Available: https://izlik.org/JA36YU67PW
ISNAD
Bayrakçı, Hilmi Cenk - Özgür, Arif Emre - Alan, Abdullah. “Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems”. Journal of Thermal Science and Technology 34/2 (June 1, 2014): 91-97. https://izlik.org/JA36YU67PW.
JAMA
1.Bayrakçı HC, Özgür AE, Alan A. Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems. Journal of Thermal Science and Technology. 2014;34:91–97.
MLA
Bayrakçı, Hilmi Cenk, et al. “Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems”. Journal of Thermal Science and Technology, vol. 34, no. 2, June 2014, pp. 91-97, https://izlik.org/JA36YU67PW.
Vancouver
1.Hilmi Cenk Bayrakçı, Arif Emre Özgür, Abdullah Alan. Thermodynamic Analysis of Expander Usage in Two Stage-Transcritical R744 Cooling Systems. Journal of Thermal Science and Technology [Internet]. 2014 Jun. 1;34(2):91-7. Available from: https://izlik.org/JA36YU67PW