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Inappropriate space allocation for concentrator photovoltaic (CPV) systems in the solar farm causes optical losses via shadowing between adjacent CPV systems, which leads to the deterioration of the overall electrical generation of solar power plant (SPP). The deterioration of the overall electrical generation can be reduced by increasing the separation distance between adjacent CPV systems. However, it causes an increase in land-related costs due to ineffectiveness in land utilization. Therefore, it is important to focus on the layout design optimization in the SPP to attain the best trade-off between land usage and energy generation. In order to captivate the interest of investors in the future development of solar energy, levelized cost of electricity (LCOE) of the SPP needs to be competitive. A newly developed computational algorithm has been introduced to perform the optimization of the CPV field layout system by utilizing the local weather data with the consideration of shadowing effect, edge effect, land aspect ratio (LAR) and land cost. A case study has been conducted in Kota Kinabalu, Malaysia to evaluate the performance of CPV system in the SPP based on different conditions such as D-ew/L ratio, D-ns/L ratio, spacing angle, LAR and land cost for both square array and staggered array configuration. From the case study, the results show that the optimized field layout for the CPV systems for LAR of 1 is a staggered array layout configuration with D-ew/L ratio of 2.50 at spacing angle of 45 degrees, which accommodates the lowest value of LCOE.

A multi-segment plate (MSP) concentrator for solar concentration photovoltaic (CPV) system is described. The optical model of the concentrator is established and the Monte Carlo Ray Tracing approach is employed to conduct the solar concentrating simulation. A prototype of the concentrator is built for the experimental study. The comparison of the numerical and experimental results show a good agreement on the energy flux density distribution on solar cells. The test results reveal that the concentrator has a relatively high solar concentrating uniformity of 0.8. The I-V test is carried out and the results indicate that the photo-electric transformation efficiencies of solar cell monomer and module are both higher than those of the CPV system with a parabolic trough concentrator. The optical analyses of the concentrator are also carried out. The results show that the geometric concentrating ratio increases with the increasing of solar cell installing height. When the solar cell installing height is fixed, the peak value of geometric concentrating ratio exists as the slope angle of focal plane increases from 0 to 90 degrees. The sun-tracking error effect analysis results indicate that the relative optical efficiency of the CPV system could be 0.8 or even higher under normal sun-tracking condition. (C) 2018 Elsevier Ltd. All rights reserved.