کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
789486 1466439 2012 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Steady-state operational degrees of freedom in absorption chillers and heat pumps: Methodology and case study
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Steady-state operational degrees of freedom in absorption chillers and heat pumps: Methodology and case study
چکیده انگلیسی

The main purpose of modelling and analysing absorption chillers and heat pumps in operation is to reproduce the system performance using operational data. To perform this analysis, the first two important issues are finding the number of degrees of freedom of the system model and identifying which set of operational process variables are appropriate to reduce the available degrees of freedom to zero. Applying the conventional method of finding degrees of freedom for advanced cyclic processes is a complex, confusing and time consuming process. This paper proposes a simple and straight forward systematic method for determining the degrees of freedom and a way of selecting the appropriate set of process variables to close the mathematical models developed for absorption chillers and heat pumps in operation. The method is applied to different examples of absorption cycles ranging from simple to advanced (complex) configurations. It is also applied to a small scale ammonia-water absorption chiller in a pilot plant to demonstrate the systematic selection of operational process variables for developing a well-posted model for absorption chillers and heat pumps in operation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refrigeration - Volume 35, Issue 6, September 2012, Pages 1570–1582
نویسندگان
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