کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5475442 1521411 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design and numerical investigation of an adaptive nozzle exit position ejector in multi-effect distillation desalination system
ترجمه فارسی عنوان
طراحی و بررسی عددی یک خروجی موقعیت انقباض نازل انطباق در سیستم آب شیرین سازی تقطیر چند اثر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی


- An adaptive nozzle exit position (ANXP) ejector was proposed for the first time.
- An ejector simulation model was established and validated by experimental data.
- An optimum NXP range was obtained for the highest performance of ejector.
- An optimum NXP correlation was developed to design the ANXP ejector.

Few investigations have been conducted on an ejector that has an auto-tuning capability to regulate the performance of a multi-effect distillation-thermal vapour compression (MED-TVC) desalination system with the variation of operating conditions. In this study, an adaptive nozzle exit position (ANXP) ejector was first proposed to enhance ejector performance by self-adjusting the position of the primary nozzle with the change of primary pressure. A computational fluid dynamics (CFD) model was established and validated using experimental data. Simulation results indicate that there is an optimum NXP range of 43 mm-70 mm for an ejector to achieve its highest performance. The maximum increase of the entrainment ratio is 35.8% compared to that at an NXP of −30 mm. The secondary flow rate first increases and then decreases while the primary flow rate remains unchanged with the increase of the NXP in fixed working conditions. Furthermore, a correlation between optimum NXP and primary pressure was developed to provide designing parameters for the ANXP ejector.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 140, Part 1, 1 December 2017, Pages 673-681
نویسندگان
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