Performance evaluation of dual axis solar tracking system with photo diodes

Abstract

Continuous evolution of the technology determined a sustained increase of the conversion efficiency of PV panels, but nonetheless the most part of the commercial panels have efficiencies no more than 20%. A constant research preoccupation of the technical community involved in the solar energy harnessing technology refers to various solutions to increase the PV module conversion efficiency. Among PV efficiency improving solutions we can mention: solar tracking, optimization of solar cells geometry, enhancement of light trapping capability, use of new materials and so forth.This study is performed to investigate the performance of photovoltaic systems with photo diodes oriented solar tracking system. The result from daily analyses and two season comparative analyses shows, as expected, that in clear days the dual axis tracker photovoltaic system provides the highest performance and great performance in the summer season during higher tilt angle of the sun.

Long – term performance evaluation of a fixed and solar follow – up systems with modified astronomical positioning in Polish conditions

“…Figure 2 shows the value of annual electricity production for a fixed photovoltaic installation, on the basis of real measurements conducted between July 2014 -June 2015 and calculations using modified mathematical relationship (16) with relative error analysis, including determined correction factors and without correction. Figure 3 shows the value of annual electricity production for a 2 -axis Sun tracking construction, on the basis of real measurements conducted between July 2014 -June 2015 and calculations using mathematical formula (17). …”

“…Results of measurements, conducted between July 2014 and June 2015, were compared with values determined using formula (16) and (17).…”

“…for Texas (USA) [13], for Denizli [14] and Kahramanmaras (Turkey) [15], Almaty (Kazakhstan) [16], Gwangju (South Korea) [17], Montreal (Canada) [18], Bengaluru (India) [19].…”

Development of a Novel Spherical Light-Based Positioning Sensor in Solar Tracking

“…In the studies using LDRs, the positions where the light intensity of the sun in the sky is high are detected by specially positioning these LDR sensors within the installed systems. The positions of LDRs can be placed either in West-East or North-South directions, or in special positions [14][15][16][17][18][19]. Due to utilization of these sensors, tracking of the sun can only be made within certain limits and without producing angular outputs [20][21][22][23][24][25][26].…”