Comparative evaluation of experimental ejector refrigeration system for different operating configurations

Yıl 2024, Cilt: 10 Sayı: 2, 321 - 329, 22.03.2024

Batuhan Üğüdür , Mehmet Direk

https://doi.org/10.18186/thermal.1448602

Öz

In this study, a comparative performance evaluation of an experimental ejector refrigeration system was conducted for various operating modes. The experimental setup was operated in different modes: conventional vapour compression refrigeration (CVCR), conventional dual-evaporator system (CDES), and dual-evaporator ejector system (DEES). The system was tested under different operating conditions, including varying condenser temperatures and mass flow rates. The results of the evaluation showed that the highest total cooling capacity and coefficient of performance (COP) were achieved in the DEES mode, while the lowest total cooling capacity was observed in the CDES mode. The lowest compressor power was calculated when the system was operated in DEES mode. When the condenser temperature was 33°C, the compressor power obtained in the DEES was 22.7%, 5.4%, and 17.7% lower than that of
the CVCRA, CVCRB, and CDES modes, respectively. In conclusion, the performance of the ejector-operated system was found to be superior to the other configurations, and the ejector contributed positively to the system performance.

Anahtar Kelimeler

Cooling Capacity, COP, Dual Evaporator, Ejector

Kaynakça

• [1] Dupont JL. The Role of Refrigeration in the Global Economy (2019), 38th Note on Refrigeration Technologies. Available at: https://iifiir.org/en/fridoc/the-role-of-refrigeration-in-the-global-economy-2019-142028. Accessed February 21, 2024.
• [2] Bilir Sag N, Ersoy HK, Hepbasli A, Halkaci HS. Energetic and exergetic comparison of basic and ejector expander refrigeration systems operating under the same external conditions and cooling capacities. Energy Convers Manag 2015;90:184–194. [CrossRef]
• [3] Kutlu Ç, Ünal S, Erdinç MT. Thermodynamic analysis of Bi-evaporator ejector refrigeration cycle using R744 as natural refrigerant. J Therm Eng 2016;2:735–740. [CrossRef]
• [4] Caliskan O, Ersoy HK. Energy analysis and performance comparison of transcritical CO2 supermarket refrigeration cycles. J Supercrit Fluids 2022;189:105698. [CrossRef]
• [5] Ünal Ş, Cihan E, Erdinç MT, Bilgili M. Influence of mixing section inlet and diffuser outlet velocities on the performance of ejector-expansion refrigeration system using zeotropic mixture. Therm Sci Eng Prog 2022;33. [CrossRef]
• [6] Zhang Z, Feng X, Tian D, Yang J, Chang L. Progress in ejector-expansion vapor compression refrigeration and heat pump systems. Energy Convers Manag 2020;207:112529. [CrossRef]
• [7] Tashtoush BM, Al-Nimr MA, Khasawneh MA. A comprehensive review of ejector design, performance, and applications. Appl Energy 2019;240:138–172. [CrossRef]
• [8] Lawrence N, Elbel S. Analytical and experimental investigation of two-phase ejector cycles using low-pressure refrigerants. Int Refrig Air Cond Conf 2012:1–11. [CrossRef]
• [9] Wang X, Yu J, Zhou M, Lv X. Comparative studies of ejector-expansion vapor compression refrigeration cycles for applications in domestic refrigerator-freezers. Energy 2014;70:635–642. [CrossRef]
• [10] Geng L, Liu H, Wei X, Hou Z, Wang Z. Energy and exergy analyses of a bi-evaporator compression/ejection refrigeration cycle. Energy Convers Manag 2016;130:71–80. [CrossRef]
• [11] Kim S, Jeon Y, Chung HJ, Kim Y. Performance optimization of an R410A air-conditioner with a dual evaporator ejector cycle based on cooling seasonal performance factor. Appl Therm Eng 2018;131:988–997. [CrossRef]
• [12] Gao Y, He G, Cai D, Fan M. Performance evaluation of a modified R290 dual-evaporator refrigeration cycle using two-phase ejector as expansion device. Energy 2020;212:118614. [CrossRef]
• [13] Liu J, Lu Y, Tian X, Niu J, Lin Z. Performance analysis of a dual temperature heat pump based on ejector-vapor compression cycle. Energy Build 2021;248:111194. [CrossRef]
• [14] Wang X, Yu J, Xing M. Performance analysis of a new ejector enhanced vapor injection heat pump cycle. Energy Convers Manag 2015;100:242–248. [CrossRef]
• [15] Wang M, Cheng Y, Yu J. Analysis of a dual-temperature air source heat pump cycle with an ejector. Appl Therm Eng 2021;193:116994. [CrossRef]
• [16] Chen J, Zhang G, Wang D. Experimental investigation on the dynamic characteristic of the direct expansion solar assisted ejector-compression heat pump cycle for water heater. Appl Therm Eng 2021;195:117255. [CrossRef]
• [17] Alkhulaifi YM, Qasem NAA, Zubair SM. Exergoeconomic assessment of the ejector-based battery thermal management system for electric and hybrid-electric vehicles. Energy 2022;245. [CrossRef]
• [18] İşkan Ü, Direk M. Experimental performance evaluation of the dual-evaporator ejector refrigeration system using environmentally friendly refrigerants of R1234ze(E), ND, R515a, R456a, and R516a as a replacement for R134a. J Clean Prod 2022;352. [CrossRef]
• [19] Üğüdür B. Experimental performance evaluation of the dual-evaporator ejector refrigeration system [Master’s thesis]. Yalova: Yalova University; 2023 [Turkish].
• [20] Direk M, İşkan Ü, Tunçkal C, Mert MS, Yüksel F. An experimental investigation of ejector employed a dual-evaporator vapor compression refrigeration system under various entrainment ratios using R134a as the refrigerant. Sustain Energy Technol Assess 2022;52:102293. [CrossRef]