کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9781380 | 1511078 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimization of counterflow heat exchanger geometry through minimization of entropy generation
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A counterflow heat exchanger (CFHX) is an essential element for recuperative cooling cycles. The performance of the CFHX strongly influences the overall performance of the cryocooler. In the design of a heat exchanger, different loss mechanisms like pressure drop and parasitic heat flows are often treated separately. Acceptable values for the pressure drop and total heat leakage are estimated and thus a CFHX geometry is more or less arbitrarily chosen. This article applies another, less familiar design strategy where these losses are all treated as a production of entropy. It is thus possible to compare and sum them. In this way, a CFHX configuration can be found that is optimal for a certain application, producing a minimum of entropy and thus has minimum losses. As an example, the design steps of a CFHX for the micro cooling project at the University of Twente are given. Also a generalization of micro CFHX dimensions for cooling powers between 10 and 120Â mW is presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryogenics - Volume 45, Issues 10â11, OctoberâNovember 2005, Pages 659-669
Journal: Cryogenics - Volume 45, Issues 10â11, OctoberâNovember 2005, Pages 659-669
نویسندگان
P.P.P.M. Lerou, T.T. Veenstra, J.F. Burger, H.J.M. ter Brake, H. Rogalla,