Validation of a Monte Carlo Integral Formulation Applied to Solar Facility Simulations and Use of Sensitivities

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Cyril Caliot ◽  
Hadrien Benoit ◽  
Emmanuel Guillot ◽  
Jean-Louis Sans ◽  
Alain Ferriere ◽  
...  
Keyword(s):  
Inverse Problem ◽  
Monte Carlo ◽  
Spatial Distribution ◽  
Ray Tracing ◽  
Optical Model ◽  
Experimental Validation ◽  
Solar Flux ◽  
Integral Formulation ◽  
Complex Geometries ◽  
Multiple Reflections

The design of solar concentrating systems and receivers requires the spatial distribution of the solar flux on the receiver. This article presents an integral formulation of the optical model for the multiple reflections involved in solar concentrating facilities, which is solved by a Monte Carlo ray-tracing (MCRT) algorithm that handles complex geometries. An experimental validation of this model is obtained with published results for a dish configuration. The convergence of the proposed algorithm is studied and found faster than collision-based algorithms. In addition, an example of the use of the sensitivity of the power on a target to the mirror rms-slope is given by treating an inverse-problem consisting in finding the equivalent rms-slope of mirrors that best match the flux map measurements.

Comparative and sensitive analysis for parabolic trough solar collectors with a detailed Monte Carlo ray-tracing optical model

2014 ◽  
Vol 115 ◽  
pp. 559-572 ◽  
Author(s):  
Z.D. Cheng ◽  
Y.L. He ◽  
F.Q. Cui ◽  
B.C. Du ◽  
Z.J. Zheng ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Ray Tracing ◽  
Optical Model ◽  
Solar Collectors ◽  
Parabolic Trough ◽  
Sensitive Analysis

A Solar Trough Concentrator for Pill-Box Flux Distribution Over a CPV Panel

2010 ◽  
Vol 132 (1) ◽  
Author(s):  
R. Bader ◽  
A. Steinfeld
Keyword(s):  
Monte Carlo ◽  
Analytical Solution ◽  
Ray Tracing ◽  
Focal Plane ◽  
Flux Distribution ◽  
Solar Flux ◽  
Target Area ◽  
Mirror Surface ◽  
Surface Imperfections ◽  
Flux Concentration

An integral methodology is formulated to analytically derive the exact profile of a solar trough concentrator that delivers a uniform radiative flux distribution over a flat rectangular target area at the focal plane. The Monte Carlo ray-tracing technique is applied to verify the analytical solution and investigate the effect of sun shape and mirror surface imperfections on the radiation uniformity and spillage. This design is pertinent to concentrating photovoltaics at moderate mean solar flux concentration ratios of up to 50 suns.

scholarly journals Oil Droplet Clouds Suspended in the Sea. Can they be Remotely Detected?

2016 ◽  
Author(s):  
Zbigniew Otremba
Keyword(s):  
Monte Carlo ◽  
Visible Light ◽  
Ray Tracing ◽  
Layer Thickness ◽  
Optical Model ◽  
Microwave Spectrum ◽  
Sea Surface ◽  
Oil Droplet ◽  
Sea Area ◽  
The Impact

Oil floating on the sea surface can be detected by both passive and active methods using the ultraviolet-to-microwave spectrum, whereas oil immersed below the sea surface can signal its presence only in visible light. This paper presents an optical model of a sea area deeply polluted by an oil suspension (10 ppm) located in a layer (thickness 5 m) separated from the sea surface by a clear layer (thickness 1 m). The impact of wavelength and state of the sea surface on reflectance changes is shown based on the results of Monte Carlo ray tracing. A two-wavelength index of reflectance is proposed to detect oil suspended in the water column (645-469 nm).

Monte Carlo-based calculation of imaging plate response to 90Sr in teeth: experimental validation of the required correction on sample thickness

2007 ◽  
Vol 46 (3) ◽  
pp. 215-220 ◽  
Author(s):  
Kenichi Tanaka ◽  
Satoru Endo ◽  
Shin Toyoda ◽  
Eldana Tieliewuhan ◽  
Alex Romanyukha ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Experimental Validation ◽  
Sample Thickness ◽  
Imaging Plate

Analysis of a Hybrid PV/T Concept Based on Wavelength Selective Films

2013 ◽  
Author(s):  
Tejas U. Ulavi ◽  
Jane H. Davidson ◽  
Tim Hebrink
Keyword(s):  
Thin Film ◽  
Monte Carlo ◽  
Total Energy ◽  
Ray Tracing ◽  
Solar Spectrum ◽  
Photovoltaic Module ◽  
Optical Performance ◽  
Technical Performance ◽  
Compound Parabolic Concentrator ◽  
Pv Modules

The technical performance of a non-tracking hybrid PV/T concept that uses a wavelength selective film is modeled. The wavelength selective film is coupled with a compound parabolic concentrator to reflect and concentrate the infrared portion of the solar spectrum onto a tubular absorber while transmitting the visible portion of the spectrum to an underlying thin-film photovoltaic module. The optical performance of the CPC/selective film is obtained through Monte Carlo Ray-Tracing. The CPC geometry is optimized for maximum total energy generation for a roof-top application. Applied to a rooftop in Phoenix, Arizona USA, the hybrid PV/T provides 20% more energy compared to a system of the same area with independent solar thermal and PV modules, but the increase is achieved at the expense of a decrease in the electrical efficiency from 8.8% to 5.8%.

Uncertainties evaluations in the ray-tracing algorithm based on Monte Carlo method

2014 ◽  
Author(s):  
Guojin Feng ◽  
Ping Li ◽  
Yingwei He ◽  
Yu Wang ◽  
Houping Wu
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Ray Tracing ◽  
Tracing Algorithm
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