Search results for "Frequency distribution"
showing 2 items of 12 documents
The reference frequency distributions of daily relative sunshine from different locations
1984
Abstract In some applications the relative sunshine distribution curves are very usefull. The present work tends to provide the above frequency distributions for the Italian area, using the daily data of eleven stations. A preliminary compatibility test is applied in order to verify if a dependence on location exist and it is deduced that the area referring to the various locations is statistically compatible with a few exceptions. Therefore, it is possible to give generalized frequency distributions curves which can be considered reference curves for all Italian locations. The empirical distributions are also compared with the calculated ones by the method of Bendt et al. and a good agreem…
A methodology for optimisation of solar dish-Stirling systems size, based on the local frequency distribution of direct normal irradiance
2021
Abstract In geographical areas where direct solar irradiation levels are relatively high, concentrated solar energy systems are one of the most promising green energy technologies. Dish-Stirling systems are those that achieve the highest levels of solar-to-electric conversion efficiency, and yet they are still among the least common commercially available technologies. This paper focuses on a strategy aimed at promoting greater diffusion of dish-Stirling systems, which involves optimizing the size of the collector aperture area based on the hourly frequency distributions of beam irradiance and defining a new incentive scheme with a feed-in tariff that is variable with the installed costs of…