Energy Potential Estimation of the Region’s Solar Radiation Using a Solar Tracker

Abstract— Research results are yielded proving the great potential of renewable and alternative energy sources of the Republic of Tajikistan, including solar energy, equal to 25 billion kW h per year. The limited use of “green energy” will impose to periodic blackouts of electric consumers in the autumn-winter period. For remedy the emerging lack of energy, a more complete idea of the potential of solar energy is required. The paper provides the estimation of the energy potential of solar radiation in the Pamir regions and the south of Tajikistan. The mathematical model for definition of maximum value of the azimuth angle for the Pamir region is presented. Expressions for an assessment of functioning of two systems and increments of solar radiation and energy potential, by taking into account duration of daylight are offered. Measurements and calculations of monthly, seasonal and annual levels of solar radiation were performed based on the use of two technical systems. It was shown that the energy efficiency of the dual axis solar tracker (DAST) significantly exceeds the efficiency of the static solar system (SSS) especially in the autumn, spring and summer seasons. A comparative analysis of solar energy production and the efficiency of two systems with the use of a solar tracker for a biaxial tracking system and a fixed system is given. It is shown that the annual productivity of the DAST compared with the SSS is on average by 30% higher. In the autumn, the movable system can generate 80% more energy relative to the stationary arrangement of solar panels. Assessment of the solar potential of the regions of Tajikistan proves the feasibility of using this potential as suitable resource for the development of energy, complementing hydrogeneration.