Effects of Nozzle Exit Position on Condenser Outlet Split Ejector-Based R600a Household Refrigeration Cycle

Energies

Sanghoon Kim¹  Yongseok Jeon²  JaeHwan Ahn³  Hoon Kim³ 

[1] Department of Mechanical Design Engineering, Chonnam National University, 50 Daehak-ro, Yeosu, Chonnam 59626, Korea;Department of Refrigeration and Air-Conditioning Engineering, Chonnam National University, 50 Daehak-ro, Yeosu, Chonnam 59626, Korea;Research Group of Consumer Safety, Korea Food Research Institute, 245 Nongsaengmyeong-ro, Iseo-Myeon, Wanju-Gun, Jeollabuk-do 55365, Korea;

关键词: two-phase ejector;    nozzle exit position;    household refrigeration cycle;    optimization;    condenser outlet split;   

DOI  :  10.3390/en13195160

来源: DOAJ

【 摘 要 】

The objective of this study is to investigate the performance characteristics of a small-sized R600a household refrigeration system that adopts a condenser outlet split (COS) ejector cycle under various operating and ejector geometry conditions. The coefficient of performance and pressure lifting ratio of the COS ejector cycle were analyzed and measured by varying the entrainment ratio, compressor speed, and nozzle exit position. The optimum nozzle exit position in the COS ejector cycle adopted to achieve the maximum cycle performance was proposed as a function of the compressor speed and entrainment ratio. The optimum nozzle exit position was 0 mm when the entrainment ratio and compressor speed were low, and it increased as the entrainment ratio and compressor speed increased owing to the associated internal pressure drop in the suction section.

【 授权许可】

Unknown