scholarly journals Simulation and Experimental Study on the Optical Performance of a Fixed-Focus Fresnel Lens Solar Concentrator Using Polar-Axis Tracking

Energies ◽  
2018 ◽  
Vol 11 (4) ◽  
pp. 887 ◽  
Author(s):  
Hai Wang ◽  
Jin Huang ◽  
Mengjie Song ◽  
Yanxin Hu ◽  
Yunfeng Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Polar Axis ◽  
Fresnel Lens ◽  
Solar Concentrator ◽  
Optical Performance

scholarly journals Two-Axis Solar Heat Collection Tracker System for Solar Thermal Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Tsung-Chieh Cheng ◽  
Wei-Cheng Hung ◽  
Te-Hua Fang
Keyword(s):  
Experimental Study ◽  
Focal Length ◽  
Polar Axis ◽  
Fresnel Lens ◽  
Heat Energy ◽  
Power Measurement ◽  
Solar Irradiation ◽  
The Sun ◽  
Solar Heat ◽  
Solar Thermal Applications

An experimental study was performed to investigate the effect of using a continuous operation two-axes tracking on the solar heat energy collected. This heat-collection sun tracking which LDR (light dependent resistor) sensors installed on the Fersnel lens was used to control the tracking path of the sun with programming method of control with a closed loop system. The control hardware was connected to a computer through Zigbee wireless module and it also can monitor the whole tracking process information on a computer screen. An experimental study was performed to investigate the effect of using two-axes tracking on the solar heat energy collected. The results indicate that sun tracking systems are being increasingly employed to enhance the efficiency of heat collection by polar-axis tracking of the sun. Besides, the heating power was also measured by designed power measurement module at the different focal length of Fresnel lens, and the design of shadow mask of LDR sensors is an important factor for solar photothermal applications. Moreover, the results also indicated that the best time to obtain the largest solar irradiation power is during 11:00 –13:00  in Taiwan.

Design and Evaluation of the Fresnel-Lens Based Solar Concentrator System Through a Statistical-Algorithmic Approach

2018 ◽  
Author(s):  
Hassan Qandil ◽  
Weihuan Zhao
Keyword(s):  
High Temperature ◽  
High Efficiency ◽  
Incident Light ◽  
Thermal Analyses ◽  
Solar Spectrum ◽  
Chromatic Aberration ◽  
Fresnel Lens ◽  
Optimum Number ◽  
Solar Concentrator ◽  
Receiver System

A novel non-imaging Fresnel-lens-based solar concentrator-receiver system has been investigated to achieve high-efficiency photon and heat outputs with minimized effect of chromatic aberrations. Two types of non-imaging Fresnel lenses, a spot-flat lens and a dome-shaped lens, are designed through a statistical algorithm incorporated in MATLAB. The algorithm optimizes the lens design via a statistical ray-tracing methodology of the incident light, considering the chromatic aberration of solar spectrum, the lens-receiver spacing and aperture sizes, and the optimum number of prism grooves. An equal-groove-width of the Poly-methyl-methacrylate (PMMA) prisms is adopted in the model. The main target is to maximize ray intensity on the receiver’s aperture, and therefore, achieve the highest possible heat flux and output concentration temperature. The algorithm outputs prism and system geometries of the Fresnel-lens concentrator. The lenses coupled with solar receivers are simulated by COMSOL Multiphysics. It combines both optical and thermal analyses for the lens and receiver to study the optimum lens structure for high solar flux output. The optimized solar concentrator-receiver system can be applied to various devices which require high temperature inputs, such as concentrated photovoltaics (CPV), high-temperature stirling engine, etc.

Fresnel lens solar concentrator design and spectral distribution on focus surface

2011 ◽  
Vol 18 (5) ◽  
pp. 398-402 ◽  
Author(s):  
Zuo Chun Shen ◽  
Yu Lu ◽  
Jian Ye Lu
Keyword(s):  
Spectral Distribution ◽  
Fresnel Lens ◽  
Solar Concentrator

Effect of Solar Brightness Profiles on the Performance of Parabolic Concentrating Collectors

2009 ◽  
Author(s):  
Daniel J. Chapman ◽  
Diego A. Arias
Keyword(s):  
Analytical Methods ◽  
Meteorological Data ◽  
Uncertainty Propagation ◽  
Gaussian Function ◽  
Analytical Models ◽  
The Sun ◽  
Solar Concentrator ◽  
Optical Performance ◽  
Optical Surface ◽  
Solar Brightness

Solar brightness profiles were used to model the optical performance of a parabolic linear solar concentrator. A sensitivity analysis of the sun size on collector performance was completed using analytical methods. Ray traces were created for solar brightness profiles having circumsolar ratios from 0–40%, slope errors of the optical surface from 2–5 mrads, and angles of incidence varying from 0–60 degrees. Using typical meteorological data for two locations, the optical performance was calculated and averaged over a year. Intercept factors of these simulations were compared to simpler analytical models that cast the sun shape as a Gaussian function. Results showed that collector performance is relatively insensitive to solar profile, and that using a representative Gaussian solar profile will tend to underestimate collector performance compared to using exact weighted solar profiles by about 1%. This difference is within the uncertainty propagation of the intercept factor calculated with analytical methods.

scholarly journals An experimental study of solar cooker performance with thermal concentrator system by spot Fresnel lens

2020 ◽  
Vol 5 (8 (107)) ◽  
pp. 31-41
Author(s):  
Asrori Asrori ◽  
Sudjito Suparman ◽  
Slamet Wahyudi ◽  
Denny Widhiyanuriyawan
Keyword(s):  
Experimental Study ◽  
Fresnel Lens

Enhancing the performance of a single-basin single-slope solar still by using Fresnel lens: Experimental study

2019 ◽  
Vol 239 ◽  
pp. 118094 ◽  
Author(s):  
Lei Mu ◽  
Xuesong Xu ◽  
Thomas Williams ◽  
Claire Debroux ◽  
Rocio Castillo Gomez ◽  
...  
Keyword(s):  
Experimental Study ◽  
Fresnel Lens ◽  
Solar Still

Optical Analysis of a Heliostat Array With Linked Tracking

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
M. T. Dunham ◽  
R. Kasetty ◽  
A. Mathur ◽  
W. Lipiński
Keyword(s):  
Concentration Ratio ◽  
Tracking System ◽  
Average Concentration ◽  
Solar Concentrator ◽  
Optical Performance ◽  
Optical Analysis ◽  
Optical Efficiency ◽  
The North ◽  
The Individual ◽  
East West

The optical performance of a novel solar concentrator consisting of a 400 spherical heliostat array and a linked two-axis tracking system is analyzed using the Monte Carlo ray-tracing technique. The optical efficiency and concentration ratio are compared for four different heliostat linkage configurations, including linkages of 1 × 1, 1 × 2, 2 × 2, 4 × 4, and 5 × 5 heliostats for 7-hour operation and the selected months of June and December. The optical performance of the concentrator decreases with the increasing number of heliostats in the individual groups due to increasing optical inaccuracies. In June, the best-performing linked configuration, in which 1 heliostat in the east-west direction and 2 heliostats in the north-south direction are linked, provides a monthly-averaged 7-hour optical efficiency and average concentration ratio of 79% and 511 suns, respectively. In December, the optical efficiency and the average concentration ratio decreases to 61% and 315 suns, respectively.

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