کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
225756 464509 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Velocity and temperature profiles, heat transfer coefficients and residence time distribution of a temperature dependent Herschel–Bulkley fluid in a tubular heat exchanger
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Velocity and temperature profiles, heat transfer coefficients and residence time distribution of a temperature dependent Herschel–Bulkley fluid in a tubular heat exchanger
چکیده انگلیسی

Banana puree was studied as a temperature dependent Herschel–Bulkley fluid. Experiments were conducted in a tubular heat exchanger at three flow rates (2.5 × 10−5, 3.7 × 10−5 and 4.7 × 10−5 m3 s−1), at three steam temperatures (110.0, 121.1 and 132.2 °C) and two length/diameter ratios (250 and 500). The minimum, maximum and average residence times were calculated from on-line electrical conductivity measurements. Inlet and outlet temperatures were recorded. A model was proposed to obtain heat transfer coefficients and velocity and temperature profiles in the heat exchanger. The continuity, energy and momentum equations were integrated using a finite difference method. The heat transfer coefficients varied from 654.8 to 1070.4 W m−2 K−1 for average velocities of 0.24–0.40 m s−1. There is good agreement between experimental parameters and those predicted by the model.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Food Engineering - Volume 76, Issue 4, October 2006, Pages 632–638
نویسندگان
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