کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10294003 512447 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A modified three-dimensional numerical model for predicting the short-time-step performance of borehole ground heat exchangers
ترجمه فارسی عنوان
یک مدل عددی سه بعدی اصلاح شده برای پیش بینی عملکرد کوتاه مدت از مبدلهای حرارتی زمین گمانه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
A modified three-dimensional numerical model for the borehole ground heat exchangers was proposed which took into account the effect of grout thermal capacitance and fluid circulation period inside the U-tube in a short-time-step analysis. The present model was validated by experimental data from others. It was found that the fluid temperature along the U-tube changed abruptly at the interface between the entering and the existing fluid inside the borehole. Before the entering fluid travelled to the bottom of the U-tube, the borehole was only partly-loaded. The difference in the simulated fluid leaving temperatures between the long- and short-time-step approaches could be up to 3 °C when a periodic intermittent load, common during the low-load season, was applied. This implied that a short-time-step model should be used in a long-term dynamic system simulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Renewable Energy - Volume 87, Part 1, March 2016, Pages 618-627
نویسندگان
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