کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7058255 1458076 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vapor compression refrigeration cycle for electronics cooling - Part II: gain-scheduling control for critical heat flux avoidance
ترجمه فارسی عنوان
چرخه تبرید فشرده سازی بخار برای خنک سازی الکترونیک - قسمت دوم: کنترل زمانبندی سود برای اجتناب از جریان شار حرارتی
کلمات کلیدی
چرخه فشرده سازی بخار، خنک کننده الکترونیک، شار گرمای انتقالی، کنترل بازخورد، کنترل زمان رسیدن به دست آوردن،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
This paper addresses the feedback control of a vapor compression cycle for electronics cooling at different operating conditions including near the critical heat flux (CHF) condition. The control objective is to maintain the temperature of the heated wall below a safe threshold during large transient heat loads. The lumped-parameter model developed for this system is used to design the control strategy. Our experimental testbed is used for evaluation and validation. Linear controller design is applied based on the linearization about specific operating points. The controllers are tuned to achieve good robustness margins to guard against nonlinearity and other modeling errors. When the system traverses through multiple operating points, a gain-scheduling approach is used to switch between the controllers. For heat load changes which would lead to CHF, a dual-input gain-scheduling controller, using both expansion valve and compressor speed, is designed using the evaporator wall temperature as the feedback variable as well as the scheduling variable. Comparison between open-loop and closed-loop experiments for the same operating conditions shows that a 80 °C rise in the wall temperature is avoided with the gain-scheduling controller.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 66, November 2013, Pages 922-929
نویسندگان
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