کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786900 1466422 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimal subcooling in vapor compression systems via extremum seeking control: Theory and experiments
ترجمه فارسی عنوان
کم کردن کافی مطلوب در سیستم های فشرده سازی بخار از طریق کنترل عصبانیت: نظریه و آزمایش
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• COP is maximized by an optimal condenser subcooling.
• Optimal subcooling is a convex function of many variables.
• Extremum seeking control is used to achieve optimal subcooling.
• A novel VCS system architecture is used to enable direct subcooling control.
• Simulation and experimental results demonstrate a 9–11% increase in COP.

With vapor compression systems consuming a significant portion of the overall U.S. energy consumption each year, extensive efforts have been made toward the development of control strategies which aim to maximize system efficiency while providing the desired cooling. However, previous control strategies under-utilize a degree of freedom corresponding to the amount of refrigerant in the system, which is related to condenser subcooling and can significantly affect system efficiency. In this paper, an alternative system architecture, which utilizes a receiver and an additional electronic expansion valve, is used to provide independent control of condenser subcooling. Simulation and experimental results show there exists an optimal subcooling which maximizes system efficiency; however, this optimal subcooling changes with operating conditions. Therefore, extremum seeking control is implemented to find the optimal subcooling in an adaptive, model-free manner. Experimental results demonstrate a 9% increase in efficiency using the alternative architecture and extremum seeking control.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 43, July 2014, Pages 14–25
نویسندگان
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