INVESTIGATION OF THE EFFECT OF THE PRIMARY NOZZLE THROAT DIAMETER ON THE EVAPORATOR PERFORMANCE OF AN EJECTOR EXPANSION REFRIGERATION CYCLE

The present work aims to perform the thermodynamic analysis of an ejector expansion refrigeration cycle (EERC) with a constant-pressure two phase flow ejector and to present the effect of primary nozzle throat diameter on cooling capacity of the EERC. The refrigerant is R134a. In order to achieve these objectives, a computational program is developed using EES software to simulate the system. Mathematical modeling of EERC and applied computational procedure are reported in detail. Operation under critical mode is favorable in ejector operation in terms of high entrainment ratio and enhanced ejector performance. As a result, in this present study, ejector of the refrigeration cycle operates under critical conditions and normal shock occurs at the end of the constant area mixing section. Not an iteration process but Henry and Fauske model is applied to determine the physical properties of the fluid under critical conditions.

Keywords:

Ejector, Ejector Expansion Refrigeration, Constant-Pressure Ejector Two-Phase Ejector,

PDF

___

[1] Sarkar, J. (2010). Geometric parameter optimization of ejector‐expansion refrigeration cycle with natural refrigerants. International Journal of Energy Research, 34(1), 84-94.
[2] Lawrence, N., Elbel, S. (2012). Experimental and analytical investigation of automotive ejector air conditioning cycles using low-pressure refrigerants. International Proceedings of International Air Conditioning and Refrigeration Conference, 2118-2122.
[3] Gurulingam, S., Kalaisselvane, A., Alagumurthy, N. (2012). Performance improvement of forced draught jet ejector using constant rate momentum change method. International Journal of Engineering and Advanced Technology (IJEAT),2, 149-153.
[4] Dixit, M., Arora, A., Kaushik, S. C. (2016). Energy and exergy analysis of a waste heat driven cycle for triple effect refrigeration. Journal of Thermal Engineering, 2, 954-961.
[5] Kutlu, C., Unal, S., Erdinc, M. T. (2016). Thermodynamic analysis of bi-evaporator ejector refrigeration cycle using r744 as natural refrigerant. Journal of Thermal Engineering, 2, 735-740.
[6] Sarevski, M. N., & Sarevski, V. N. (2016). Characteristics of R718 refrigeration/heat pump systems with two-phase ejectors. International Journal of Refrigeration, 70, 13-32.
[7] Gay, N. H. Refrigerating System. US Patent 1,836,318, 1931.
[8] Kornhauser, A. A. (1990). The use of an ejector as a refrigerant expander. In Proceedings of the 1990 USNCR/IIRPurdue Refrigeration Conference, 10-19.
[9] Elbel, S. W., Hrnjak, P. S. (2008). Experimental validation of a prototype ejector designed to reduce throttling losses encountered in transcritical R744 system operation. International Journal of Refrigeration, 31, 411-422.
[10] Harrell, G. S., Kornhauser, A.A. (1995). Performance tests of a two-phase ejector. In Proceedings of the 30th Intersociety Energy Conversion Engineering Conference, 49–53.
[11] Disawas, S., & Wongwises, S. (2004). Experimental investigation on the performance of the refrigeration cycle using a two-phase ejector as an expansion device. International Journal of Refrigeration, 27(6), 587-594.
[12] Wongwises, S., & Disawas, S. (2005). Performance of the two-phase ejector expansion refrigeration cycle. International journal of heat and mass transfer, 48(19-20), 4282-4286.
[13]Wang, X., & Yu, J. (2016). Experimental investigation on two-phase driven ejector performance in a novel ejector enhanced refrigeration system. Energy Conversion and Management, 111, 391-400.
[14] Tashtoush, B., Alshare, A., Al-Rifai, S. (2015). Performance study of ejector cooling cycle at critical mode under superheated primary flow. Energy Convers. Manage., 94, 300–310.
[15] Munday, J. T., & Bagster, D. F. (1977). A new ejector theory applied to steam jet refrigeration. Industrial & Engineering Chemistry Process Design and Development, 16(4), 442-449.
[16] Huang, B. J., Jiang, C. B., & Hu, F. L. (1985). Ejector performance characteristics and design analysis of jet refrigeration system. Journal of engineering for gas turbines and power, 107(3), 792-802.
[17]Huang, B. J., Chang, J. M., Wang, C. P., & Petrenko, V. A. (1999). A 1-D analysis of ejector performance. International journal of refrigeration, 22(5), 354-364.
[18] Seckin, C. (2017). Parametric analysis and comparison of ejector expansion refrigeration cycles with constant area and constant pressure ejectors. Journal of Energy Resources Technology, 139, 042005-1 - 042005-10.
[19] Khalil, A., Fatouh, M., & Elgendy, E. (2011). Ejector design and theoretical study of R134a ejector refrigeration cycle. International Journal of Refrigeration, 34(7), 1684-1698.
[20] Rogdakis, E. D., & Alexis, G. K. (2000). Investigation of ejector design at optimum operating condition. Energy Conversion and Management, 41(17), 1841-1849.
[21] Sokolov, M., & Hershgal, D. (1990). Enhanced ejector refrigeration cycles powered by low grade heat. Part 2. Design procedures. International Journal of Refrigeration, 13(6), 357-363.
[22] Abdel-Aal, H. K., Al-Zakri, A. S., El-Sarha, M. E., El-Swify, M. E., & Assassa, G. M. (1990). Other options of mass and energy input for steam jet refrigeration systems. The Chemical Engineering Journal, 45(2), 99-110. [23] Selvaraju, A., & Mani, A. (2004). Analysis of an ejector with environment friendly refrigerants. Applied Thermal Engineering, 24(5-6), 827-838.
[24] Chen, J., Havtun, H., & Palm, B. (2014). Parametric analysis of ejector working characteristics in the refrigeration system. Applied Thermal Engineering, 69(1-2), 130-142.
[25] Sadeghi, M., Mahmoudi, S. M. S., & Saray, R. K. (2015). Exergoeconomic analysis and multi-objective optimization of an ejector refrigeration cycle powered by an internal combustion (HCCI) engine. Energy Conversion and Management, 96, 403-417.
[26] He, S., Li, Y., & Wang, R. Z. (2009). Progress of mathematical modeling on ejectors. Renewable and Sustainable Energy Reviews, 13(8), 1760-1780.
[27] Ouzzane, M., & Aidoun, Z. (2003). Model development and numerical procedure for detailed ejector analysis and design. Applied Thermal Engineering, 23(18), 2337-2351.
[28] Liu, F., & Groll, E. A. (2008). Analysis of a two phase flow ejector for transcritical co2 cycle. In Proceedings of the International Refrigeration and Air Conditioning Conference, 924-930.
[29] Zucker, R., & Biblarz, O. (2002). Fundamentals of Gas Dynamic, 2nd ed.; John Wiley and Sons, INC: New York.
[30] Cengel, Y. A., Boles, M. A. (2001). Thermodynamics: An engineering approach. McGraw-Hill: Boston.
[31] Henry, R. E., & Fauske, H. K. (1971). The two-phase critical flow of one-component mixtures in nozzles, orifices, and short tubes. Journal of Heat Transfer, 93(2), 179-187.
[32] Chaiwongsa, P., & Wongwises, S. (2008). Experimental study on R-134a refrigeration system using a two-phase ejector as an expansion device. Applied Thermal Engineering, 28(5-6), 467-477.
[33] Hassanain, M., Elgendy, E., & Fatouh, M. (2015). Ejector expansion refrigeration system: Ejector design and performance evaluation. International Journal of Refrigeration, 58, 1-13.
[34] Tangren, R. F., Dodge, C. H., & Seifert, H. S. (1949). Compressibility effects in two‐phase flow. Journal of Applied Physics, 20(7), 637-645.
[35] Banasiak, K., Hafner, A., & Palacz, M. (2015). State of the art in the identification of two-phase transonic flow phenomena in transcritical CO2 ejectors, In Proceedings of the 24th IIR International Congress of Refrigeration, 80-88.
[36] Elbel, S. W., &Lawrence, N. (2016). Review of recent developments in advanced ejector technology. International Journal of Refrigeration, 62, 1-18.

Başlangıç: 2015
Yayıncı: YILDIZ TEKNİK ÜNİVERSİTESİ

Arşiv