Energy efficiency interventions.
The purpose of this project is the energy upgrading of a center for youth gathering and cultural production located in the municipality of Novara.
The building consists of a central block consisting of three above-ground floors and two newly constructed side blocks intended for public entertainment activities.
Replacement of winter heating and summer cooling system
First of all, the energy upgrading work involves dismantling the old systems, to be replaced by a VRF (Variable Refrigerant Flow) system capable of operating in both heating and cooling. This system will consist of three outdoor units, distributors that will be able to effectively distribute refrigerant according to the operating modes of the indoor units. The emission will be through floor fan coils and ceiling cassettes. Finally, two control systems capable of managing 50 indoor units respectively will be installed to manage the system.
Replacement of the domestic hot water production system.
Domestic hot water production will take place through the installation of an air-water heat pump with a useful output of 25 kW with 800-liter storage tank.
Pressurization system design
When the pressure is insufficient to the extent that the operation of the equipment is impaired, the installation of a pressurization unit is necessary to ensure adequate pressure to even the most disadvantaged users. For proper operation of the equipment, the pressure must be not less than 1.5 bar and not more than 4-5 bar.
The system being designed includes a pressurization unit with inverter pumps. The system is supplied as a factory assembled and calibrated one-piece assembly consisting of:
- Two variable-speed electric pumps;
- Pressure detectors;
- Control panel;
- A diaphragm autoclave;
- A pressure storage tank.
The advantages of this system are certainly the maintenance of pressure at almost constant values and the compactness of the system and thus very small footprint.
Pressurization system design
The forced air extraction system has been provided in blind bathrooms to ensure the extraction of stale air. In fact, this choice is essential to ensure greater comfort and healthiness.
Exhausted air is expelled to the outside through a rooftop helicocentrifugal extractor with a three-speed adjustable single-phase motor with non-return damper.
The rigid ducts will be made of galvanized steel with a circular cross-section, while the flexible ducts will be made of fiberglass fabric coated with PVC on both sides and embedded spiral made of harmonic wire.
The terminals chosen for air return will be white-painted steel return valves with adjustable center, consist of plenum and damper.
In order not to bring the rooms into depression, transit grilles must be added both in the doors of each bathroom and in the doors to the corridors that give access to the ante-bathroom. The system is designed to turn on through presence detectors or through the light switch.
