Resumen de Quantification of the reduction of the heat loss coefficient of the envelope of an energy-rehabilitated office building
Irati Uriarte Perez de Nanclares, Catalina Giraldo Soto, Koldobika Martín Escudero, Pablo Eguía López, Aitor Erkoreka González
Nowadays, a considerable performance gap is found when the design and the real energy consumption of buildings are compared. Three main sources are responsible of this gap: the users’ behavior, the buildings’ real energy systems’ performance and the buildings’ envelope performance. The envelope energy performance characterization of in-use buildings is commonly done using the Heat Loss Coefficient (HLC) as Key Performance Indicator (KPI). The HLC is the sum of the transmission heat loss coefficient through the building envelope (UA [kW/K]) and the infiltration and/or ventilation heat loss coefficient of the building Cv [kW/K]. Another important KPI is the solar aperture of the building envelope Sa [m2].
