کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7044721 1457086 2018 30 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation on double tube-pass shell-and-tube heat exchangers with different baffle configurations
ترجمه فارسی عنوان
بررسی عددی مبدل های حرارتی پوسته و لوله دو با پانل های مختلف بافر
کلمات کلیدی
اجرای ترمو هیدرولیک، بافر جداسازی مبدل های حرارتی، تجزیه و تحلیل اگزرژی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Thermo-hydraulic performances of shell-and-tube heat exchangers with different baffle types have been widely evaluated using computational fluid dynamics (CFD) methods. In this paper, double-tube-pass shell-and-tube heat exchanger (DTP-STHE) is proposed to improve the recovered heat quality from the point of exergy analysis. Results reveal that the recovered heat quality in DTP-STHE is almost twice as that in single-tube-pass shell-and-tube heat exchanger (STP-STHE). Furthermore, the heat transfer rates in both heat exchangers are nearly the same. In all heat exchangers, increasing the mass flow rate of water in shell side can increase the exergy utilizing efficiency and heat transfer rate, but the mass-weighted average temperature of water decreases. In order to investigate thermo-hydraulic performances of different DTP-STHEs, three kinds of DTP-STHEs with segmental, helical and flower baffles respectively are compared under the same conditions. Results show that flower baffles produce the lowest pressure drop and lowest heat transfer coefficient. For better evaluating the economic performance of these three kinds of heat exchangers, heat transfer rate per effective pumping power (i.e., QH/P0) is introduced. The simulation results show that QH/P0 of flower baffle is the highest and QH/P0 of segmental baffle the lowest.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 143, October 2018, Pages 561-569
نویسندگان
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