Conclusion

The impact of uncertainty in ground reflectance is practiced in this study. This value in EnergyPlus is considering as average monthly equal 0.2. However, according to literature, this value can be varied between 0.05 and 0.45. Regarding this analysis, two different scenarios are evaluated. The first scenario considers a controlled shading strategy and second one assessing the performance of a fix shedder. The total amount of incident solar radiation on the building envelope with the respect of ground radiation uncertainty is evaluated. The uncertainty in ground reflectance is propagated on the building energy model and the analysis is performed for 5 years of weather conditions. In order to propagate this uncertainty, different sets of samples are generated with Monte Carlo sampling. The results provide a better overview of the performance of each scenario, especially, on the lower and upper limits of shading performance also the frequency of incident solar radiation for each hour of a day.
This kind of analysis will be useful for designers to provide a more confidence performance of proposed shading strategies. Also, this analysis can use for analysis related to solar heat gains and inside comfort conditions. This analysis could be used to reduce the performance gap between reality and building energy simulations. As observed in scenario 2.

The future work

The future work of this study will be composed of following  tasks:     

Acknowledgements

This research is conducted by the  support of a doctoral scholarship granted by Fondazione Fratelli Confalonieri. Moreover,  the weather data using in this study is provided by Osservatorio Meteo Milano Duomo.