Effect of Pv Shadow on Cooling Load and Energy Consumption of Zone Toward Achieving NZEB

Abstract

Development strategy offers us the resources required to investigate the connection between today’s environmental challenges and the possibility of their progress tomorrow. Currently, the world is facing the greatest surge of population expansion in modern history, which Forced governments to expand urbanization and establishing new cities to accommodate the massive population increase. As a result, the building sector’s CO2 emissions have proceeded to grow by almost 1% a year since 2010, So there is an urgent need to find untraditional solutions to overcome upcoming energy, emissions problems and facing the expected increase of electricity prices. Nearly zero-energy buildings (NZEB) is one of the emerging technologies in the building sector which depend on enhancing building’s energy performance and its extremely low energy demand is met with aid of renewable energy sources as PV solar panels. Via a study made on a conditioned zone located on the last floor of a university building belonging to Arab academy located in Alexandria, Egypt. The effect of the shadow caused by PV panels placed on the roof was studied. A 3D model of the zone was built, then a CFD analysis using the K-epsilon turbulence model was carried out to realize the essence of the shadow effect on this zone. For further clarity and using the DesignBuilder simulation tool the zone cooling load was calculated for both cases with and without PV on the roof, it was found that the zone cooling load reduced by 11.5% in case PV panels are installed on the roof.