کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6679970 1428065 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An optimized Monte Carlo ray tracing optical simulation model and its applications to line-focus concentrating solar collectors
ترجمه فارسی عنوان
یک مدل شبیه سازی نوری ردیابی مونت کارلو بهینه شده و برنامه های کاربردی آن به تمرکز بر تمرکز بر مجموعه های خورشیدی تمرکز دارد
کلمات کلیدی
مدل بهینه شده روش ردیابی مونت کارلو، ویژگی نوسانات، تعداد تصادفی، تمرکز خط تمرکز جمع کننده خورشیدی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
The Monte Carlo Ray Tracing (MCRT) method has been confirmed flexible and efficient in the optical simulation of Concentrating Solar Collectors (CSCs), but it usually needs higher computing cost and longer runtime or its results fluctuate in multiple runs. The parameters of the way of random number generation, the number of rays, running times, grid numbers, and random number generation times all exerted effects on the simulation results. It was found that running the MCRT model with less number of rays for several more times could mitigate the fluctuation of results and decrease the total runtime simultaneously. Taken the Line-focus CSC with a metal-glass receiver and a parabolic reflector as an example, the maximum (emax) and average (eavg) relative errors of the MCRT method with 1 × 108 rays running for once, 2 × 107 rays running for once and 3 × 106 rays running for five times were all lower than the threshold values (Emax = 5% and Eavg = 0.5%), but the total runtime was about 410 s, 82 s and 63 s respectively. On these bases, an optimized MCRT model was proposed by combining the MCRT method with the iteration method, where the minimum running times (tmin) and the maximum running times (tmax) were introduced, and they could be changed conveniently to meet the requirements of different optical simulations. By applying the proposed model to the Line-focus CSC with a more complex cavity receiver or compound parabolic reflector, the total runtime varied in the range of 268-413 s and 26-102 min respectively, indicating that the runtime reduction was significant when the limit of relative errors were acceptable. The proposed model is beneficial to mitigate the fluctuation, improve the accuracy and reduce the runtime of the MCRT method. It can also be further used to the optical simulation of various kinds of CSCs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 225, 1 September 2018, Pages 769-781
نویسندگان
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