The municipality of Albino

The municipality of Albino

Energy refurbishment and efficiency

What we are doing for the municipality

Albino is an Italian municipality of 18,218 inhabitants in the Seriana Valley, in the province of Bergamo, Lombardy. With an area of 31.32 km² and an average altitude above sea level of 342 metres, the town extends along the bottom of the valley on both sides.

Through a methodological approach dictated by a natural predisposition to managing issues connected to energy refurbishment and efficiency, in the municipality of Albino we are carrying out interventions on the buildings’ energy systems, and introducing a remote control monitoring system, creating a smart network spread across the local area capable of gathering information from the facilities managed that, in addition to ensuring sound energy management and optimisation, encourage the creation and management of energy efficiency measures based on the analysis of all the available data. The data network set up within the urban area of Albino enables us to perform real-time monitoring and the remote management of all of the heating functions that have been streamlined within the perimeter of the service.

Objectives:

  • Refurbishment of the systems in question, or their modification in compliance with current regulations in terms of security, technologies and performance;
  • Increasing the energy efficiency of the systems, i.e. the reduction of energy consumption while respecting established comfort levels.

In numbers:

  • Interventions carried between May 2014 and October 2015
  • Five buildings made energy-efficient
  • Intervention time: 14 months
  • Co2 emissions avoided: 78.53 tonnes/year
  • Trees planted: 7,853
  • Tonnes of Oil Equivalent (TOE) avoided: 37.4

Scopri i dettagli dei nostri progetti di riqualificazione ed efficientamento energetico

ANALYSIS OF THE CURRENT SCENARIO

The building is situated in the area of Desenzano, in the northeast of the town towards the neighbouring municipality of Cene; the primary school is housed within a historic building consisting of two floors above ground plus a semi-basement that is used as a deposit, as well as an attic space that is not heated.

The heating unit, used solely for heating the building, is located in a building separate from the main structure and is accessible from the school courtyard. The heating plant is powered by two pairs of modular boilers for an overall capacity of 316.8 kW. The building’s hot water is provided by two electric storage boilers installed in the disabled toilets and in the kitchen on the ground floor.

In relation to the current legal requirements and regulations, the following irregularities were identified:

  • The regulating thermostat, the thermostat switch, the pressure switch, the thermometer and the pressure gauge were all in need of replacement;
  • Minimum pressure switch to be determined.

 

PROJECT HIGHLIGHTS

  • Refurbishment of the heating unit
  • Dismantling of the generators and current chimney flue
  • Installation of a modern modulating condensation chimney flue with the appropriate flue pipe
  • Upgrading of the pipes and insulation in the heating plant
  • Installation of an inverter pump, which is also indispensable for the thermostat valves mounted on the radiators in the spaces
  • Redesign of the circuit board in the heating unit and the creation of a new board suited to the new capacity and features of the unit that will also include a switchboard for climate thermoregulation and remote control
  • Installation of a climate switchboard equipped with external sensor and system outlet capable of providing a 0-10 Volt signal to the boiler to establish the temperature for producing hot water based on the external climatic conditions
  • Setting of a climate curve that is optimal both for the type and exposure of the building, keeping the unit’s use of cold water under control.

ANALYSIS OF THE CURRENT STATE

The building that houses the municipal library is located in the historic centre of Albino; the heating unit is situated in a dedicated underground space and is accessible from the courtyard through a hatch that can be accessed by lifting a grate. The four boilers manufactured by Hydrother are now obsolete. With a heating capacity of 300 kW, they heat a system equipped with radiant floor panels and radiators.

In relation to the current legal requirements and regulations, the following irregularities were identified:

  • The signs indicating security exits and escape routes are in need of upgrading
  • The regulating thermostat, the thermostat switch, the pressure switch, the thermometer and the pressure gauge were all in need of replacement
  • Minimum pressure switch to be determined

 

PROJECT HIGHLIGHTS

  • Installation of a condensation heating system to better exploit the low temperature of the floor heating system
  • New climate regulation also for the boiler through a new external sensor
  • Refurbishment of the extraction system for combustion bi-products
  • Installation of a dirt separator at the return inlet of the boiler in order to ensure the continuous cleaning of the fluid circulating in the plant once it has entered into service
  • Refurbishment of the circuit board and installation of regulating switchboard and remote control
  • Remote control of the unit’s load in order evaluate potential leaks through the installation of an impulse counter that interfaced with the remote control system
  • Installation of a new pump to transport the water to the floor on which the heating unit is situated.

ANALYSIS OF THE CURRENT STATE

The building, which is situated in Bondo Petello, is used for educational activities and consists of one floor above ground and one semi-basement with the main entrance situated on the northern side.

The heating unit is located in a dedicated room on the basement level, which can be accessed by an open-air stairway. The heating unit consists of three 68kW heat generators, only one of which is currently functioning. The group of generators is used only for heating interior spaces; the production of sanitary hot water takes place through a 20.9kW boiler.

In relation to the current legal requirements and regulations, the following irregularities were identified:

  • The signs indicating security exits and escape routes were in need of upgrading.
  • The security valve, the fuel interception valve, the closed expansion tank, the regulating thermostat, the thermostat switch, the pressure switch, the thermometer and the pressure gauge all needed replacing.
  • Minimum pressure switch to be determined.

 

PROJECT HIGHLIGHTS

In view of the poor conditions of the current state and the energy inefficiency of the plant, we decided to completely overhaul the heating unit with the installation of a new freestanding condensation heat generator:

  • Replacement of old circulators with new electronic permanent magnetic circulators equipped with inverters capable of working at variable speeds
  • Installation of thermostat valves on radiators in order to control temperatures in each space and to distribute the thermal load in each space in a uniform way across the building
  • As for the production of sanitary hot water, the replacement of the existing instantaneous production system with an innovative heat pump integrated in the storage tank. All of which is thermo-regulated and remote-controlled by a brand new system installed on the circuit board
  • Monitoring of the automatic load of cold water in the system with a new impulse counter interfaced with the remote management system to detect any leaks in the system 

ANALYSIS OF THE CURRENT STATE

The building consists of two floors above ground, the main part is used for educational activities, while the canteen, which was constructed at a later date, occupies a block adjacent to that containing the classrooms, located at a lower level and connected via an internal stairway.

For the heating of the spaces and the production of hot water, there are six hot water generators (only two of which function) providing a total capacity of 527.3 kW, and a 34.8 kW boiler. The generators and boiler occupy two different underground spaces, each of which is directly accessible from outside.

In relation to the current legal requirements and regulations, the following irregularities were identified:

  • The safety valve, the fuel interception valve, the regulating thermostat, the thermostat switch, the pressure switch, thermometer and pressure gauge need replacing
  • Minimum pressure switch to be determined.

 

PROJECT HIGHLIGHTS

The school has undergone a refurbishment that saw the installation of an exterior insulation finishing system. The refurbishment led to a reduction in the thermal capacity required to heat the building. Furthermore, seeing as the existing radiators were designed to work in conditions of greater dispersion, meaning that these are now oversized. These observations lead us to draw two important conclusions:

  • The reduction in the necessary heating capacity enables us to install a new condensation boiler with a lower capacity than the current unit
  • The oversized radiators enable us to set a lower temperature and therefore enable more efficient use of the condensation boiler

The interventions:

  • Refurbishment of the unit and installation of a condensation boiler with a modulating burner, variable-speed circulators and thermostat valves on the radiators. All of which is carried out following a thorough cleaning of the existing pipes and the installation of a dirt separator
  • Complete reconstruction of the thermoregulation and the circuit board at the heating unit with the installation of remote control equipment  
  • Remote control of the plant load to identify leakages of water in the circuit
  • Replacement of the gas boiler in the substation with a boiler with an instantaneous external heat exchanger using the existing flow collector.

ANALYSIS OF THE CURRENT STATE

The Abbazia secondary school is spread across four floors above ground. The heating unit is located in a specific room with direct access from outside. The heating plant is powered by three old generation boilers with an overall capacity of 204kW, and is used solely for heating the building; while for hot water there is a 21.2kW gas-powered storage water heater, which is also installed in the same space as the heating unit.

In relation to the current legal requirements and regulations, the following irregularities were identified:

  • The signs indicating emergency exits and escape routes are in need of upgrading
  • The safety valve, the fuel interception valve, the closed expansion tank, the regulating thermostat, the thermostat switch, the pressure switch, thermometer and pressure gauge need replacing.
  • Minimum pressure switch to be determined

 

PROJECT HIGHLIGHTS

  • Complete refurbishment of the heating unit with the installation of a condensation boiler, related chimney flue with climate regulation and modulating burner
  • Replacement of circulators with new variable-speed versions (electronic with inverters)
  • Installation, in the rooms, on radiators of thermostat valves in order to provide temperature control for each space and to distribute the heat load to each space in a uniform way throughout the building
  • Production of sanitary hot water with an innovative heat pump integrated into the storage tank, installed in the heating unit in such a ways to recover the heat dispersed in that space
  • All of the above is thermo-regulated and remotely controlled by a new system installed on the brand new circuit board
  • Monitoring the automatic load of cold water in the system with a new impulse counter interfaced with the remote control system to identify any leaks

Resources

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SHOWCASE FOR CITIES

The Enel X project in Bologna

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