Fluid Flow and Heat Transfer Characteristics Investigation in the Shell Side of the Branch Baffle Heat Exchanger

سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 330

فایل این مقاله در 12 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

JR_JAFM-14-6_016

تاریخ نمایه سازی: 8 دی 1400

چکیده مقاله:

The branch baffle heat exchanger, being an improved shell-and-tube heat exchanger, for which the flow manner of the shell-side fluid is a mixed flow of oblique flow and local jet. The computational fluid dynamics (CFD) method has been implemented to investigate the fluid pattern and heat transfer performance. The accuracy of the modeling approach has been confirmed by an experimental approach using a Laser Doppler Velocimeter system. Flow field, temperature field, and pressure field are displayed to study the physics behavior of fluid flow and thermal transport. Heat transfer coefficient, pressure drop, and efficiency evaluation criteria are analyzed. In contrast with the shell-and-tube heat exchanger with segmental baffles and shutter baffles, the pressure loss in the proposed heat exchanger with branch baffles has been dramatically improved, accompanied by a slight decrease in heat transfer coefficient under the same volume flow rate. The efficiency evaluation criteria of the heat exchanger with branch baffles are ۲۸%-۳۱%,۱۳.۲%-۱۴.۱% higher than those with segmental baffles and shutter baffles, respectively. Further analysis in accordance with the field synergy principle illustrates that the velocity and pressure gradients of the heat exchanger with branch baffle have finer field coordination. The current heat exchanger structure provides a reference for the future optimization design to reach energy saving and emission reduction.

نویسندگان

K. Wang

School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou ۴۵۰۰۰۲, China

J. Q. Liu

School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou ۴۵۰۰۰۲, China

Z. C. Liu

School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou ۴۵۰۰۰۲, China

W. Chen

School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou ۴۵۰۰۰۲, China

X. C. Li

School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou ۴۵۰۰۰۲, China

L. Zhang

School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou ۴۵۰۰۰۲, China

مراجع و منابع این مقاله:

لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :