In this paper, the daily, monthly, seasonally and yearly optimum slope angles of solar collectors are determined for 20 Iranian cities and then new correlations are developed to calculate the monthly, seasonally and yearly optimum slope angles for any latitude in Iran. To achieve this purpose, the values of monthly optimum slope angles at different locations of Iran are needed. Thus, the slope and surface azimuth angles of solar collectors for receiving maximum solar radiation are determined in 20 Iranian cities in different days, months, seasons and the whole year. According to the optimum slope angles predicted in this paper, the correlations are obtained. The results showed that the optimum azimuth angle is zero for receiving maximum solar energy, so the maximum daily or monthly solar energy is independent of the azimuth angle. In addition, the results of the monthly optimum slope angles achieved using these correlations show more accurate results when compared with reference data.
Keywords. Solar energy; Slope angle; Azimuth angle; Solar collectors; Correlations
How to cite this article
Abdolzadeh, M., Talebizadeh, P., Mehrabian, M.A. and Keshavarz, S.A. (2011). 'Developing New Models to Predict Optimum Slope Angle of Solar Collectors for Any Latitude in Iran'. SET Proceedings, 10, pp. 1-6. https://doi.org/10.65582/set.2011.138
