![]() ![]() ![]() Sopian K, E BS (2017) Effect of the nozzle exit position on the efficiency of ejector cooling system using R134A. Sumeru K, N H (2012) A review on two-phase ejector as an expansion device in vapor compression refrigeraton cycle. Haida M, Smolka J, Hafner A, Ostrowski Z, Palacz M, Nowak AJ, Banasiak K (2018) System model derivation of the CO 2 two-phase ejector based on the CFD-based reduced-order model. Li Y, Deng J, Ma L, Zhang Y (2018) Visualization of two-phase flow in primary nozzle of a transcritical CO 2 ejector. Rahamathullah MR, Palani K, Aridass T, Venkatakrishnan P, Palani S (2012) A review on historical and present developments in ejector systems. Liu Y, Yu M, Yu J (2022) An improved 1-D thermodynamic modeling of small two-phase ejector for performance prediction and design. The reason for this amount of error is friction and crashing of secondary fluid to the primary nozzle wall, the ejector hiving nozzle with a small diameter and longer divergent length has a high mass flow rate and speed, on the other hand, ejectors with short divergent length and large throat diameter type have better expansion and thermodynamic behavior which makes it the best choice to be used in the refrigeration system. The computational tools were capable of describing fluid behavior inside the ejector later post-process has shown that the results and outcomes match with experimental studies with 12% errors. The effect of each condition is expressed in the result and conclusion. Primary nozzle geometry was tested with three different throat diameters, divergent lengths, and pressure inputs. A C-D nozzle is used in the primary inlet to achieve a better expansion and fine vapor quality from the mixing process of primary and secondary fluid in the suction chamber. In this study, Computational Fluid Dynamics (CFD) utilized to investigate the impacts of primary nozzle geometry and dimensions on the performance of a two-phase ejector, and R134a is used as a working fluid because it is an environmentally friendly refrigerant that operates under low-pressure conditions.
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