کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
250453 502674 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelling of the coefficient of performance of an air-cooled screw chiller with variable speed condenser fans
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Modelling of the coefficient of performance of an air-cooled screw chiller with variable speed condenser fans
چکیده انگلیسی

Air-cooled chillers are generally recognized as energy intensive equipment in air-conditioned buildings in the subtropical climate. This paper considers how the use of variable speed condenser fans enables these chillers to operate more efficiently. The thermodynamic model of an air-cooled screw chiller was developed using the simulation program TRNSYS and validated using the field data and specifications of the chiller. The staging of condenser fans and the control of their speed in various operating conditions were described. A comparison was made on the coefficient of performance of the chiller in the steady state with various control strategies: head pressure control with constant or variable speed condenser fans; condensing temperature control (CTC) with constant or variable speed condenser fans. Potential improvements in the chiller COP due to the use of CTC with variable speed condenser fans were discussed. The findings of this paper are useful in developing more energy efficient air-cooled chillers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Building and Environment - Volume 41, Issue 4, April 2006, Pages 407–417
نویسندگان
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