کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
296522 511728 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simulation of condensation in a closed, slightly inclined horizontal pipe with a modified RELAP5 code
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Simulation of condensation in a closed, slightly inclined horizontal pipe with a modified RELAP5 code
چکیده انگلیسی


• RELAP5 code performance was analyzed in predicting transient condensation processes.
• Serious limitation of the prediction capabilities was identified.
• The condensation model for horizontal pipes was modified.
• The stratified flow pattern, and the local void fraction was taken into account.
• An improved prediction of the heat transfer process was achieved.

The performance of the RELAP5 thermal-hydraulic system code was analyzed in predicting very fast transient condensation processes in horizontal pipes. The code significantly underpredicted the heat transfer from the primary to the secondary side in case of rapid wall condensation process in the so called Inverse Edwards Pipe Experiment, where the condensation pipe was immerged in a cool water pool, and hot steam injection was performed into a pipe, which was closed on one side. The RELAP5 condensation model for horizontal pipes was modified in order to take into account a stratified flow pattern, and the effect of the local void fraction. The modified RELAP5 code was compared to the original code through the calculation of the Inverse Edwards Pipe Experiment. An improved prediction of the heat transfer process was achieved, considering the temperature, pressure and void fraction distribution along the horizontal pipe during the transient condensation process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 273, 1 July 2014, Pages 288–297
نویسندگان
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