Energy efficiency for the transcritical compression CO2 cycle with the use of the ejector as the first stage of the compression

• Autorzy: Kozioł J. , Gazda W. , Wilżyński Ł.
• Języki publikacji: EN

Abstrakty

EN

An analysis of energy efficiency for transcritical compression unit with CO2 (R744) as the refrigerant has been carried out using empirical operating characteristics for the two-phase ejector. The first stage of the refrigerant compression is carried out in the ejector. The criterion adopted for the estimation of energy efficiency for the cycle is the coefficient of performance COP. The analysis is performed for the heat pump and refrigeration systems. The results of COP for the systems with the ejector has been compared with the COP[L], values for the single stage Linde cycle.

Słowa kluczowe

EN

ejector; energy efficiency; transcritical CO2 cycle

PL

efektywność energetyczna; eżektor; transkrytyczny cykl CO2

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2010
• Tom: Vol. 31, no. 4
• Strony: 61--69
• Opis fizyczny: Bibliogr. 7 poz.,Rys., wykr., wz.,

Twórcy

autor

Kozioł J.

autor

Gazda W.

autor

Wilżyński Ł.

• Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-101 Gliwice

Bibliografia

• [1] SOKOŁOW J.J., ZINGER N.M.: Ejectors. WNT, Warsaw, 1965.
• [2] BERGANDER M., BUTRYMOWICZ D., KARWACKI J., WOJCIECHOWSKI A.: Application of two-phase ejector as second stage compressor in refrigeration cycles. 7th Word Conf. on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, Krakow 2009.
• [3] BUTRYMOWICZ D., KARWACKI J., TRELA M.: The application of two-phase ejectors. Proceedings of XXXIII Refrigeration's Conference, Poznań 2001.
• [4] KOZIOŁ J., SKŁADZIEŃ J., GAZDA W.: Measurement identification and comparative thermal analysis of transcritical CO2 cycles with two-phase ejector for heat pump units. Presentation of the Workshop meeting, SINEF - Trondheim, May 2010.
• [5] KOZIOŁ J., HAFNER A., WILŻYŃSKI L.: Theoretical-empirical characteristic of ejector as an element of the transcritical R 744 cycle of heat pump unit (unpublished).
• [6] DAQING LI,. GROLL E.A: Transcritical CO2 refrigeration cycle with ejector-expansion device. International Journal of Refrigeration 28(2005) 766-773.
• [7] JIAN-QIANG DENG, PEI-XUE JIANG, TAO LU, WEI LU: Particular characteristics of transcritical CO2 refrigeration cycle with an ejector. Applied Thermal Engineering 27(2007), 381-388.