کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4925441 1431398 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development and analysis of a novel scaling methodology for stability appraisal of supercritical flow channels
ترجمه فارسی عنوان
توسعه و تجزیه و تحلیل یک روش مقیاس جدید برای ارزیابی ثبات کانال های جریان فوق بحرانی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
The prospect of achieving higher thermal efficiency with simpler plant design, projects Supercritical water reactor as a better futuristic option compared to its boiling water counterpart. However, performing lab-scale experiment with supercritical water, particularly for appraisal of stability performance, is an arduous task, considering the level of pressure and temperature involved. That necessitates scaling analysis for the development of reduced-scale models to simulate true-scale prototype under lab-level constraints. Present study, therefore, attempts to develop a scaling methodology focused on stability analysis and to identify a less-restrictive model fluid, while proposing generalized scaling rules preserving the phenomenological physics. US reference design of SCWR is selected as the prototype. Four characterizing dimensionless groups are recognized from the non-dimensional conservation equations under imposed pressure boundary condition, while the system pressure for the model fluid is identified noting the region of similarity on the plane of non-dimensional density and non-dimensional pressure. Two-zone lumped parameter model is developed encompassing the thermalhydraulic, fuel dynamics and power dynamics equations, which are subsequently employed for linear stability analysis and also for transient simulations. Both approach produced identical stability maps, leading to a generalized representation. R134a is concluded to be the most suitable model fluid from both power and pressure point of view.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 323, November 2017, Pages 46-55
نویسندگان
, , ,