کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
648310 884618 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Instability, heat transfer and flow regime in a two-phase flow thermosyphon loop at different diameter evaporator channel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Instability, heat transfer and flow regime in a two-phase flow thermosyphon loop at different diameter evaporator channel
چکیده انگلیسی
In this study, the influence of different channel geometries on heat transfer, flow regime and instability of a two-phase thermosyphon loop, is investigated. Instabilities in flow regime and heat transfer, at low and high heat fluxes, are observed. Bubbly flow with nucleate boiling heat transfer mechanism, confined bubbly/slug flow with backflow for small channel height (H) and finally slug/churn flow at high heat fluxes are observed. This study shows that flow and thermal instability increases as channel height (H) decreases and also heat transfer coefficient increases with increasing channel height and heat flux. Bubbly flow characterizes the flow regime at high heat transfer coefficients while confined bubbles, backflow and intermittent boiling are more significant for low channel heights with lower heat transfer coefficient and critical heat flux.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 30, Issue 10, July 2010, Pages 1107-1114
نویسندگان
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