On assessment of solar energy potential at the initial stage of designing photoelectric installations
DOI:
https://doi.org/10.31548/energiya2018.02.035Abstract
The primary task of designing generating facilities based on the solar energy conversion is the pre-project study of the solar energy resource in the places where they are supposed to be located. The purpose of the research in the article is to estimate the solar energy potential in the absence of the complete array of necessary metrological measurements for solar engineering calculations. To estimate the solar energy potential, there was used technique based on the combination of the method of applying the daily solar radiation profile to the horizontal surface under the clear sky and data from meteorological satellite measurements of the NASA database, taking into account the climatic features of the region, followed by recalculation on the surface of the certain spatial orientation and interpolation to the coordinate grid of the district. There were also conducted experimental studies to analyze the accuracy of the results obtained by this technique. The volt-ampere characteristics of the photovoltaic module and the determination of its output power were taken under natural sunlight conditions in the summer-autumn period of 2016 on the site that is not shaded by neighboring building structures and green plantations at the point with specific geographic coordinates. The results of checking the adequacy of the proposed express methodology for estimating the solar energy potential have shown that the obtained error value is acceptable and does not exceed 10%. The difference between the actual actinometric information and the calculated one is caused by the fact that the calculation model is based on data that is averaged over 22 years, and the experiment was carried out for the specific day of one year. As a further direction of research, there is considered organization of monitoring solar radiation characteristics for several years, analysis of the calculated and experimental data array to clarify the proposed methodology for express estimation of the solar energy potential.
Key words: solar energy potential, geographical coordinates, horizontal receiving surface, sums of incoming solar radiation
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