Development of an energetic diagnosis method for the buildings: example of the Perugia University

Abstract

The paper suggests a methodology for energetic buildings diagnosis for the Perugia University [Energy Buildings 1436 (2002) 1; B. Puttinger, Guideline for implementing energy audits in public buildings, Landes Energie Verein; R. Recalcati, G. Dall’O’, Procedure for buildings energetic certification, Punto Energia, Brescia (1998)]. All of the university buildings have been put into six poles according to their geographical location. First of all, the entire area was subdivided into blocks according to didactics, office, and research areas. On the basis of this division, the utilization coefficient of the specific areas was determined for each pole. The paper suggests a method for pole electric consumption dividing into the three terms related to didactics, office, and laboratory block by the definition of the three “area indexes” C did.A, C off.A, and C lab.A which represent the specific consumption per square meter of dedicated area. Their values, and in particular C lab.A value, vary according to the nature of the activities carried out in each pole. Starting from “area indexes”, the three “user indexes” ( C stu.U, C per.U, and C res.U) were then defined considering students, personnell, and researcher, separately. Area and user indexes’s yearly evaluation, dependent on the users number per typology and the blocks area, allows to identify the increasing or decreasing characteristic of the intensity of the activities carried out in each pole, to determine if consumptions depend mainly on class activities being carried out or on the use of electric heater and air conditioning systems. Finally, thermal consumptions were analyzed by evaluating the yearly energy amount and the specific consumption of each pole according to age and state of the buildings.