Public Administration

The possible interventions of energy efficiency in the buildings of the Public Administration are multiple, depending on the purpose of use of the building and the state of the envelope and systems. From the point of view of plant engineering will be considered interventions on the production of thermal energy, which represents the largest share of consumption.

In the case of central and local PA offices, the main savings actions will focus on heating, plant thermoregulation and summer air conditioning.

In school buildings, the intervention perimeter will have to consider above all the requalification of the heating system with the correct sizing and its regulation, in relation to the partial use of the structure in terms of hours and volumes.

In the case of sports centres, both the heating and the production of domestic hot water for swimming pools and showers should be evaluated.

We will show you the most efficient improvements

In order to identify the most efficient improvement measures, it is necessary to draw up an energy diagnosis, a technical analysis which is also necessary to access incentives.

Thermal insulation interventions and efficiency of thermal and lighting systems, are achievable if supported by incentives.

Interventions with a reduced return time

• replacement of winter air conditioning systems with high efficiency technologies;
• installation of cogeneration or regeneration plants;
• installation of solar thermal collectors, also combined with solar cooling systems;
• replacement of electric water heaters with heat pump water heaters;
• installation of zonal thermoregulation systems and heat accounting;
• redevelopment of lighting systems with time control;
• installation of photovoltaic systems integrated to the roofs;
• installation of BEMS (Building Energy Management System) systems for remote monitoring and management of services provided by technological systems;
• efficiency of management strategies with on/off, adjustment and calibration of existing plants.

Interventions with a high return time

• thermal insulation of the building envelope;
• replacement of fixtures with related shading systems.

School buildings

The Italian municipalities are owners of about 60% of the volumes of public buildings in Italy, with very diverse uses; schools represent a large number. About 52,000 facilities, of which 22,000 built before 1970, have annual consumption of about 9.6 TWh (1.4 TWh electric and 8.2 TWh thermal).

By intervening on the most energy-intensive schools, about 20% of the Italian school patrimony with 2.6 TWh/year of energy consumption, consumption could be reduced by 48% saving about 170 million euros per year and avoiding the emission of 312,000 tons CO 2.

This consumption is due to the poor state of buildings and facilities. Heat generators in schools are generally obsolete with low seasonal yields and high thermal power, failing to ensure comfort temperatures for the high thermal dispersion of the building envelope.

The regulation system, moreover, in 61% of cases has only one control zone, the distribution system has pipes in a very poor state of preservation with poor thermal insulation. Only 22% of school buildings are equipped with summer air conditioning.

The potential for efficiency and improvement of the thermo-hygrometric comfort of school buildings is considerable.

Central and local public buildings

The public management buildings, used as administrative offices, are about 13,500 of which 3,000 of the central PA with an annual consumption of 4.3 TWh of energy (1.3 TWh electric and 3 TWh thermal) and an expense of 644 million euros.

20% of these buildings are particularly energy-intensive with an annual consumption of 1.2 TWh and an expenditure of 177 million euros. Consumption that could be reduced by 40% by intervening on the building envelope and systems, with an annual saving of 73 million euros and the reduction of 130,000 tons of CO2 emitted.

Gas-fired heating systems are 62%, while oil-fired plants are about 22%. Only 34% of the buildings have a control system with thermostatic valves and only 46% of the buildings have a summer air conditioning system.