Abstract
The energy requalification of the existing building heritage is one of the pillars European Union energy policy. A large part of the building heritage was built without taking into consideration the problem of energy consumption. With the aim of energy efficiency and energy savings in electrical uses, there are wide and diversified possibilities for improvement, including interventions on the building envelope and on the systems, with the introduction, where possible, of renewable energy sources. In this context, the redevelopment of historic buildings constitutes an important challenge, which involves both historical-artistic aspects and technological aspects relating to the improvement of energy efficiency and comfort. A critical analysis of every possibility is essential to preserve the balance between efficiency and architecture. The purpose of the study is the energy retrofitting of the Institute of General Physiology located within the “Sapienza” University campus. The proposed interventions include the renovation of the whole building envelope, investigated by thermographic surveys, and the installation of new heating and cooling systems. The results were analysed to identify the best intervention for a sustainable energy renovation of the historic building, taking into account the preservation of its architectural values and making it suitable for modern use.
Highlights
Energy consumption in the building sector represents around 40% of total energy consumption in the European Union [1] emitting particulates talking the citizens health [2]
A large part of the building heritage was built without taking into consideration the problem of energy consumption
The purpose of the study is the energy retrofitting of the Institute of General Physiology located within the "Sapienza" University campus
Summary
Energy consumption in the building sector represents around 40% of total energy consumption in the European Union [1] emitting particulates talking the citizens health [2]. The University City is served by a district heating network, powered by the new thermal power station, located in the former Regina Elena complex; the thermal power system has a power of 15 MW and it is used for the production of superheated water at 130 °C. As planned, this is clear opportunity to integrate at district level different kind of renewables such as wind [31], biomass [32] or solar [33] without affecting the buildings but even including the surroundings in the supply [34,35]. The average seasonal efficiency of heating system is 44.1%
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