کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
659744 1458137 2009 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heat transfer enhancement via liquid–liquid phase separation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Heat transfer enhancement via liquid–liquid phase separation
چکیده انگلیسی

The heat transfer and flow phenomena during phase separation of partially miscible liquid solvent system were investigated experimentally. The experiments were conducted with a three components system which has an upper critical solution temperature, using critical and off-critical compositions of the solvent mixtures. The convective heat transfer rates were studied for laminar flow in a small diameter horizontal tube and for free convection from its outer surface. It was found that with phase separation the forced convective heat transfer can be augmented by up to 130% compared to heat transfer rates obtained in single phase flow (without phase separation). However, for low quenching rate and depth associated mainly with experiments conducted with critical compositions, deterioration of the heat transfer rates was observed. The free convection heat transfer coefficients were found to be augmented up to 100%. Macro- and micro-flow visualization were also conducted to follow the flow phenomena during the phase separation, and the mechanisms responsible to the heat transfer enhancement are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 52, Issues 5–6, February 2009, Pages 1385–1399
نویسندگان
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