Image and Ray Tracing Analysis of a Parabolic Dish Collector to Achieve High Flux on a Solar Volumetric Reactor

MRS Advances ◽  
2020 ◽  
Vol 5 (50) ◽  
pp. 2545-2553
Author(s):  
Nidia Aracely Cisneros-Cárdenas ◽  
Rafael Enrique Cabanillas-López ◽  
Ramiro Alberto Calleja-Valdez ◽  
Ricardo Arturo Pérez-Enciso ◽  
Carlos Alberto Pérez-Rábago ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Ray Tracing ◽  
Focal Point ◽  
Operating Conditions ◽  
Normal Operating ◽  
University Of Arizona ◽  
Parabolic Dish ◽  
Parabolic Dish Concentrator ◽  
The University ◽  
Ray Tracing Simulation

ABSTRACTThe need to achieve a uniform distribution of concentrated solar flux in the photovoltaic, thermal or any other receivers is a common problem; therefore, the optical characterization of the concentration system is necessary to determinate the physical characteristics of the receptors. In this work, a parabolic dish concentrator of 1.65x1.65 m2, developed by research from the University of Arizona, is optically characterized under normal operating conditions, also known as environmental conditions that refer to non-controlled conditions as solar radiation, environmental temperature and wind velocity that could affect slightly, by thermal and mechanical efforts, the distribution profiles of the concentrated solar radiation. The set used for the evaluation consisted of the parabolic mirror and Chilled Lambertian Flat Surface installed in the focal point on the optical axis of the mirror. The evaluation was divided into two parts: a theoretical part that consist on using ray tracing simulation and an experimental part that corresponds to image analysis. The used methodology in this work has been stablish in many researches, so this is a reliable method. The global optical error was 2.3 mrad under normal operating conditions.

scholarly journals Ray Tracing Study of Optical Characteristics of the Solar Image in the Receiver for a Thermal Solar Parabolic Dish Collector

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Saša R. Pavlovic ◽  
Velimir P. Stefanovic
Keyword(s):  
Ray Tracing ◽  
Low Cost ◽  
Optical Design ◽  
Solar Concentrator ◽  
Solar Collectors ◽  
Focal Distance ◽  
Medium Temperature ◽  
Parabolic Dish ◽  
Parabolic Dish Concentrator ◽  
Temperature Levels

This study presents the geometric aspects of the focal image for a solar parabolic concentrator (SPC) using the ray tracing technique to establish parameters that allow the designation of the most suitable geometry for coupling the SPC to absorber-receiver. The efficient conversion of solar radiation into heat at these temperature levels requires a use of concentrating solar collectors. In this paper detailed optical design of the solar parabolic dish concentrator is presented. The system has diameter D=3800 mm and focal distance f=2260 mm. The parabolic dish of the solar system consists of 11 curvilinear trapezoidal reflective petals. For the construction of the solar collectors, mild steel-sheet and square pipe were used as the shell support for the reflecting surfaces. This paper presents optical simulations of the parabolic solar concentrator unit using the ray tracing software TracePro. The total flux on the receiver and the distribution of irradiance for absorbing flux on center and periphery receiver are given. The goal of this paper is to present the optical design of a low-tech solar concentrator that can be used as a potentially low cost tool for laboratory scale research on the medium-temperature thermal processes, cooling, industrial processes, polygeneration systems, and so forth.

Design and Analysis of a Novel Hybrid Solar/Gas Dish Stirling System (HS/GDSS)

2013 ◽  
Vol 479-480 ◽  
pp. 575-579 ◽  
Author(s):  
Wen Bei Zhan ◽  
Guo Qiang Xu ◽  
Yong Kai Quan ◽  
Xiang Luo ◽  
Ting Ting Li
Keyword(s):  
Power Plant ◽  
Solar Radiation ◽  
Thermodynamic Models ◽  
Design Capacity ◽  
System Parameters ◽  
Parabolic Dish ◽  
Electricity Power ◽  
Overall Efficiency ◽  
Parabolic Dish Concentrator

In this paper, a 20kW design capacity solar parabolic dish concentrator hybrid solar/gas dish Stirling system (HS/GDSS) is proposed. To ensure a steady operation of an electricity power plant, HS/GDSS uses gas as complement when solar radiation is weak. Thermodynamic models were made to conduct design of system parameters. After detail characteristics were chosen, analysis was carried out to evaluate this system. The results show that within design condition, overall efficiency of the system is 27.58% at daytime and 33.94% at night, which has advantages over single-energy solar dish Stirling electricity power plant.

Design Considerations for Heat-Pipe Solar Receivers

1990 ◽  
Vol 112 (3) ◽  
pp. 169-176 ◽  
Author(s):  
Douglas R. Adkins
Keyword(s):  
Solar Energy ◽  
Heat Pipe ◽  
Focal Point ◽  
Liquid Sodium ◽  
Working Fluid ◽  
Concentrated Solar Energy ◽  
Stirling Engines ◽  
Parabolic Dish ◽  
Parabolic Dish Concentrator ◽  
Solar Receiver

Heat pipes are being developed to transfer solar energy from the focal point of a parabolic dish concentrator to the working fluid of Stirling engines. With these receivers, concentrated solar energy that is absorbed on the concave surface of a dome is removed by the evaporation of liquid sodium on the convex side of the dome. Vaporized sodium then condenses on an engine’s heater tubes and transfers energy to the working fluid of the engine. The condensed sodium returns to the absorber surface where it is redistributed across the dome by the capillary action of a wick. Issues concerning the flow of sodium in a heat-pipe solar receiver are investigated in this paper. A comparison is made between various wick options, and general issues concerning the design of heat-pipe receivers are also discussed.

scholarly journals Optical analysis and performance evaluation of a solar parabolic dish concentrator

2016 ◽  
Vol 20 (suppl. 5) ◽  
pp. 1237-1249 ◽  
Author(s):  
Sasa Pavlovic ◽  
Darko Vasiljevic ◽  
Velimir Stefanovic ◽  
Zoran Stamenkovic ◽  
Evangelos Bellos
Keyword(s):  
Focal Point ◽  
Optical Design ◽  
Flow Analysis ◽  
Peripheral Region ◽  
Reflective Coating ◽  
Optimum Position ◽  
Parabolic Dish ◽  
Parabolic Dish Concentrator ◽  
And Performance ◽  
Point Distance

In this study, the optical design of a solar parabolic dish concentrator is presented. The parabolic dish concentrator consists from 11 curvilinear trapezoidal reflective petals made of polymethyl methacrylate with special reflective coating. The dish diameter is equal to 3.8 m and the theoretical focal point distance is 2.26 m. Numerical simulations are made with the commercial software TracePro from Lambda Research, USA, and the final optimum position between absorber and reflector was calculated to 2.075 m; lower than focus distance. This paper presents results for the optimum position and the optimum diameter of the receiver. The decision for selecting these parameters is based on the calculation of the total flux over the flat and corrugated pipe receiver surface; in its central region and in the peripheral region. The simulation results could be useful reference for designing and optimizing of solar parabolic dish concentrators as for as for CFD analysis, heat transfer and fluid flow analysis in corrugated spiral heat absorbers.

The Effects of Solar Irradiance, Reflecting Material and Intercept Factor to the Solar Power Intercepted by Receiver 1kW Parabolic Dish

2015 ◽  
Vol 785 ◽  
pp. 581-585
Author(s):  
Rosnani Affandi ◽  
Liaw Geok Pheng ◽  
Mohd Ruddin Ab Ghani ◽  
Chin Kim Gan
Keyword(s):  
Solar Radiation ◽  
Solar Irradiance ◽  
Solar Power ◽  
Focal Point ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Simulation Tool ◽  
Concentrating Solar Power ◽  
Energy Conversion Process ◽  
Parabolic Dish

Parabolic Dish (PD) system is one of the Concentrating Solar Power (CSP) technologies that converts the thermal energy from solar irradiance into mechanical energy and then to electrical energy. The concentrator in PD system works by focusing the solar radiation onto the receiver located at the focal point. The solar power that produced from the concentration process is intercepted by the receiver and then used for the energy conversion process in PD system. This study is carried out to understand the effect of the intercept factor, reflecting material and the DNI to the solar power intercepted by the receiver in PD 1kW system. Meanwhile, Matlab Simulink was used in this study as the simulation tool. The study shows that the solar power intercepted by the receiver in 1kW PD system are strongly depending on the intercept factor, DNI of the locations and reflecting material used for the concentrator. Whereas, the results from this study are useful for a better understanding especially on the effects of the intercept factor, reflecting material and the DNI to the solar power intercepted by the receiver for 1kW PD system in different locations with different DNI level.

THE USE OF GLASS SANITARY PIPES IN THE MODERN DAIRY*

1952 ◽  
Vol 15 (4) ◽  
pp. 186-188 ◽  
Author(s):  
John. J. Sheuring ◽  
H. B. Henderson
Keyword(s):  
Raw Milk ◽  
Operating Conditions ◽  
Normal Operating ◽  
University Of Georgia ◽  
Glass Pipe ◽  
The University

A permanent installation of glass pipes has been used in the University of Georgia Creamery for receiving raw milk for a period of two years. The pipes are installed in such a manner that they are washed and sterilized by continuous recirculation of the washing and sterilizing solutions. Bacteriological data were given which showed that the pipes can be adequately cleaned and sterilized by the recirculation method. After two years of daily use under normal operating conditions, the pipes contained practically no milkstone, were clean and shiny in appearance, and no breakage was experienced. A recommendation was made that milk sanitarians and health officials approve the glass pipe installations for receiving raw milk. The research is being continued.

The Effect of Solar Tracking Resolution to the Defocus of a Giant Fresnel Lens for a Solar Stove

2012 ◽  
Author(s):  
Peter Kane ◽  
Matthew Mokler ◽  
Peiwen Li ◽  
Ricardo G. Sanfelice
Keyword(s):  
Control System ◽  
Passive Control ◽  
Thermal Protection ◽  
Focal Point ◽  
Fresnel Lens ◽  
System Control ◽  
Solar Tracking ◽  
University Of Arizona ◽  
The University ◽  
Control Accuracy

A solar stove using a giant Fresnel lens has been developed in the Energy and Fuel Cell Laboratory at the University of Arizona. Solar tracking is required to control the Fresnel lens to maintain a stationary focal point on the heat transfer surface of the solar stove. A two-axis passive control system for solar tracking is adopted. Characteristics of the optical system are analyzed in order to find a reasonable tracking and adjustment frequency and overall system control accuracy. Defocus of the lens due to the angular offset (related to tracking resolution) of the lens’ axis versus the sunray and the change of the shape of the focal point on a static plate is calculated. The results of the analysis are used in the design of the control algorithm which has been implemented in the control system of the prototype solar stove. The proposed tracking scheme is expected to improve heat collection, thermal protection and thereby reduction of heat loss in the solar stove.

Electrostatic optics and aberration correction in the 1940s and today

1992 ◽  
Vol 50 (1) ◽  
pp. 6-7
Author(s):  
Gertrude F. Rempfer
Keyword(s):  
Electron Microscope ◽  
Focal Point ◽  
Focal Length ◽  
High Vacuum ◽  
Electron Optics ◽  
Applied Physics ◽  
Electrostatic Lenses ◽  
Commercial Instrument ◽  
The University ◽  
Theory And Experiment

I became involved in electron optics in early 1945, when my husband Robert and I were hired by the Farrand Optical Company. My husband had a mathematics Ph.D.; my degree was in physics. My main responsibilities were connected with the development of an electrostatic electron microscope. Fortunately, my thesis research on thermionic and field emission, in the late 1930s under the direction of Professor Joseph E. Henderson at the University of Washington, provided a foundation for dealing with electron beams, high vacuum, and high voltage.At the Farrand Company my co-workers and I used an electron-optical bench to carry out an extensive series of tests on three-electrode electrostatic lenses, as a function of geometrical and voltage parameters. Our studies enabled us to select optimum designs for the lenses in the electron microscope. We early on discovered that, in general, electron lenses are not “thin” lenses, and that aberrations of focal point and aberrations of focal length are not the same. I found electron optics to be an intriguing blend of theory and experiment. A laboratory version of the electron microscope was built and tested, and a report was given at the December 1947 EMSA meeting. The micrograph in fig. 1 is one of several which were presented at the meeting. This micrograph also appeared on the cover of the January 1949 issue of Journal of Applied Physics. These were exciting times in electron microscopy; it seemed that almost everything that happened was new. Our opportunities to publish were limited to patents because Mr. Farrand envisaged a commercial instrument. Regrettably, a commercial version of our laboratory microscope was not produced.

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