کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
300984 512494 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geometry parameters effect for air-cooled ejector cooling systems with R134a refrigerant
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Geometry parameters effect for air-cooled ejector cooling systems with R134a refrigerant
چکیده انگلیسی

In this paper, a CFD model calibrated by the experimental results from initial designed ejector is used to evaluate the influence of 6 key geometry parameters on the performance (entrainment ratio) of an air-cooled ejector cooling system and, consequently, to find the best design parameters. A new ejector according to the findings from the CFD simulation is then designed and used at the same air-cooled ejector system to verify the simulation results. From both simulation and testing results, we find that: 1) the optimal area ratio, the ratio of primary nozzle exist position and length of constant-area mixing section to primary nozzle diameter are lower than those of water-cooled ejector systems; 2) the optimal converging angle of constant-pressure mixing section and the ratio of primary nozzle exit position and length of constant-area mixing section to the diameter of constant-area mixing section are very close to those of water-cooled ejector systems; 3) substantial performance improvement can be achieved by using the new parameters in the ejector design.


► Study the influence of geometry parameters on the air-cooled ejector performance.
► CFD model is established and calibrated by the experimental results.
► The optimal γAγA are much lower than those of water-cooled ejector systems.
► The optimal NXP/Dn and Lm/DnLm/Dn are lower than those of water-cooled ejector systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Renewable Energy - Volume 46, October 2012, Pages 155–163
نویسندگان
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