Influence of dweelings roofs geometry in order to incorporate active solar technologies BIPVTa [Influencia de la geometría de techumbres de vivienda unifamiliar para integración de energía solar activa (BIPVTA)]

Abstract

Architectural integration of active solar energy systems (hybrid collectors with air) on dwelling´s roofs is reviewed, in recent single housing of Concepcion, Chile. Influence of volumetric configuration of roof and sides is identified. Also roof azimuth incidence was reviewed establishing that considerable deviations are allow without losing high irradiation rates. It is concluded that irradiation levels between 73% and 39% of the domestic demand in a winter day is available on average Largest Roof Section (LRS) or Second Larger Roof Section (SLRS) indexes. Then, Building Integration Photovoltaic & Thermal with Air Cooling technology was hypothetically displayed in the highest LRS house and in the lower SLRS house. These analysis showed that, LRS case production reach a 585% of the electricity demand an average day of summer and 41% in winter. Considering the SLRS case, energy production of 185% of the electricity demand is expected an average day of summer, but in a winter day only 10%. Finally, a relationship between long sides of building to get larger roof sections for active solar potential was found.