Municipality of Desenzano del Garda

Municipality of Desenzano del Garda

Energy Refurbishment and efficiency

What we are doing for the municipality

Today Desenzano del Garda is a lively town of around 28,000 inhabitants located at the southwest end of Lake Garda. The municipal area of Desenzano del Garda is located in the province of Brescia in the region of Lombardy. It spans an area of 60.1km2 and is located at an average altitude of 67m above sea level. Its location offers views of the full length of what is considered one of Europe’s most beautiful lakes. The local area is almost entirely cultivated excluding some hills that are features of the landscape, including Monte Corno, which is a protected area.

Using a methodological approach dictated by a natural predisposition for the management of issues linked to energy refurbishment and efficiency, in the town of Desenzano del Garda we are carrying out interventions on the building’s energy systems, the public lighting network and we are introducing a system of monitoring and remote control. We are creating a smart network across the area capable of gathering data from a combination of managed facilities that, in addition to ensuring sound management and energy optimisation, encourage the creation and successive management of energy efficiency measures based on the analysis of available data. The data network for the entire urban area of Desenzano del Garda enables us to monitor in “real time,” and manage remotely, each of the lighting units in the public lighting system and all of the managed heating systems within the specified area.

Objectives:

  • Refurbishment of the systems, i.e. the adaptation of these to the current standards in terms of security, technology and performance
  • Increasing the energy efficiency of the systems, i.e. the reduction of energy consumption while respecting established comfort levels.

Numbers:

  • Six buildings made energy efficient
  • Co2 emissions avoided: 390 tonnes/year
  • Trees planted 10,000
  • Tonnes of Oil Equivalent (TOE) avoided: 190

Find out the details of our energy refurbishment and efficiency projects


ANALYSIS OF THE CURRENT STATE

The general heating unit at the Via Carducci complex powers the substations of the town hall, the secondary schools, the auditorium, gym, Villa Manenti and the former technical institute and is located in a dedicated space in the courtyard of the latter building. The state of conservation is adequate and the unit will be maintained for the exclusive use of the former technical institute building.

Downstream from the main unit is the substation for the town hall: the space is located on the ground floor of the same building and directly accessible from outside. Inside the substation are two heat exchangers that power the internal circuits of the building. The unit has a summer/winter changeover and cold storage of 500 litres. Almost all of the circuits have climate regulation for the discharge temperature. A part of the building is air-conditioned through a special hot/cold VRV system. The metal framed circuit board houses both the capacity and regulating sections.

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

D.P.R. 59/09 Building energy performance

  • Disconnector switch not present
  • An adequate water inlet treatment system not present

 

PROJECT HIGHLIGHTS

In light of the irregularities discovered, the following remedial interventions are planned:

  • Installation of new components for the treatment and conditioning of inlet water and water in the system

As a result of an energy analysis, the following energy refurbishment and efficiency interventions have been planned:

  • Installation of a new heat generator (in an outdoor cabinet) with a capacity of around 380kW consisting of a number of parallel generators
  • Installation of a heat exchanger to support the new generator
  • Installation of a magnetic dirt separator for cleaning the circuit
  • Installation of heat meters.
  • Replacement of a three-way valve on the circuit served by the P3 pump with a new electric valve controlled based on the detected external temperature
  • Installation of a new remote control and supervision system that enables the accurate control of all main parameters and all the main components in order to ensure the maximum energy efficiency of the system

ANALYSIS OF THE CURRENT STATE

The heating unit for the Via Carducci complex powers the substations of the town hall, the secondary schools, auditorium, gym, Villa Manenti and the former technical institute and is located in a dedicated space within the courtyard of the latter building. The current state of conservation is adequate and the unit will be maintained to serve exclusively the building of the former Technical Institute.

Downstream from the main unit is the substation for the secondary schools: the space is located on the ground floor of the same building with direct access from outside. Inside the substation there is a heat exchanger that powers the various circuits and is characterised by climatic thermoregulation through a three-way valve. The circuits also include one for the auditorium. The metal-framed circuit board houses both the capacity section and the regulating section.

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

D.P.R. 59/09 Building energy performance

  • The disconnector switch is not present
  • The appropriate system of inlet water treatment is not present

 

PROJECT HIGHLIGHTS

In view of the irregularities encountered, the following remedial interventions have been planned:

  • Installation of new components for the treatment and conditioning of inlet water and system water         

As a result of an energy analysis, the following energy refurbishment and efficiency interventions have been planned:

  • Installation of a new heat generator (in an external cabinet) with a capacity of around 480kW consisting of a combination of parallel generators
  • Installation of a heat exchanger to support the new generator
  • Installation of a magnetic dirt separator for cleaning the circuit
  • Installation of heat meters
  • Installation of a new remote control and supervision system that will enable the accurate control of all the main parameters and the principle components in order to maximise the system’s energy efficiency

ANALYSIS OF THE CURRENT STATE

The heating unit for the Via Carducci complex powers the substations of the town hall, the secondary schools, auditorium, gym, Villa Manenti and former technical Institute and is located in a dedicated space within the courtyard of the latter building. The current state of conservation is adequate and the unit will be maintained to serve exclusively the building of the former technical institute.

 

Downstream from the main unit are located the substations of the gym and Villa Manenti; the technical space in the gym is situated on the ground floor. Directly accessible from outside, it houses, in addition to the heat exchanger, a wall-mounted methane gas boiler with a capacity of < 35kW for the production of hot water during the summer and equipped with its own gas meter. The two floor panel circuits are thermo-regulated through three-way valves while the changing room circuit is direct. The production of hot water is delegated to a 1,000 litre boiler powered both by a piaster heat exchanger and a wall-mounted boiler. The circuit board governs both the power capacity and the regulation of the system.

The technical room in Villa Manenti, on the other hand, is located on the underground floor of the building and is accessible through a hall on the side with an opening onto the gym courtyard. Inside the substation is the heat exchanger that powers a single heating circuit including climatic thermoregulation through a three-way valve mixer. The primary pipes for powering the substation are mounted along the stretch of the wall that serves to contain the adjacent embankment. An electric boiler for providing hot water is also present but not connected.

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

D.P.R. 59/09 Building energy performance

  • The disconnector switch is not present
  • The appropriate system of inlet water treatment is not present

 

PROJECT HIGHLIGHTS

In view of the irregularities encountered, the following remedial interventions have been planned:

  • Installation of new components for the treatment and conditioning of inlet water and system water

As a result of an energy analysis, the following energy refurbishment and efficiency interventions have been planned:

  • Installation of a new external cabinet heat generator with a capacity of around 230kW consisting of a combination of generators in parallel that will power both end uses
  • Installation of heat generator to support the new generator
  • Installation of magnetic dirt separator for cleaning the circuit.
  • Installation of heat meters
  • Installation of a new circulation pump to serve the Villa Menenti circuit and the replacement of a three-way valve on the circuit served by pump P2 with a new electric valve controlled based on the external temperature detected
  • Installation of a new remote control and supervision system that will enable the accurate control of all the main parameters and the principle components in order to maximise the system’s energy efficiency

ANALYSIS OF THE CURRENT STATE

The Rivoltella infant school is situated on one floor and has a heated volume of 3,943 m3.

The heating unit is located in a dedicated room on the ground floor that is separate from the main building. It is directly accessible from outside. The circuit board is housed in three metallic cabinets that contain the electric equipment for capacity and regulation. The heating unit is powered by methane gas from the network: outside the unit are located the manual interception valves (one for each generator).

The two heat generators present interface with a distribution collector that leads to two mixed circuits that serve the heating systems and a direct circuit serving the boiler for the production of hot water. The overall capacity is 158kW and the circuit is a closed tank expansion system.

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

D.M. 12/04/96 Technical regulations for fire prevention at gas powered systems

The dielectric joint from the ground is not present

The self-closing mechanism for the door is not present

D.P.R. 59/09 Building energy performance

The disconnector switch is not present

The appropriate system of inlet water treatment is not present

 

PROJECT HIGHLIGHTS

In view of the irregularities encountered, the following remedial interventions have been planned:

  • Installation of a dialectic joint on the gas pipe that emerges from the ground
  • Installation of a self-closing system on the access door to the heating unit
  • Installation of new components for the treatment and conditioning of inlet water and system water

As a result of an energy analysis, the following energy refurbishment and efficiency interventions have been planned:

  • Installation of a new high-performance and low-emission condensation heating system with a capacity of around 140kW
  • Installation of a heat exchanger to support the new generator
  • Installation of magnetic dirt separator for cleaning the circuit
  • Installation of heat meters
  • Installation of a new boiler for the production of sanitary hot water
  • Replacement of a manual three-way valve on the circuit served by the P1 pump with a new electric valve controlled based on the detected outside temperature.
  • Installation of a new remote control supervision system that enables the accurate control of the main parameters and the principle components in order to maximise the system’s energy efficiency.

ANALYSIS OF THE CURRENT STATE

The heating unit is located in a room used for this purpose on the ground floor that is separate from the building and is directly accessible from outside. The unit includes two heat generators powered by methane gas. The generators interface with a distribution collector that feeds six circuits. Regulation takes place through a three-way valve mounted upstream from the distribution collector and connected to the relevant thermoregulation circuit board. The heating unit is powered by methane gas from the network: outside the unit, the manual interception valve is situated in a position that is difficult to access. The state of conservation of the unit is poor with evident and serious problems.

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

D.M. 12/04/96 Technical regulations for fire prevention at gas powered systems

  • Only one fire extinguisher is present
  • The self-closing mechanism is not present
  • The dielectric joint is not present

D.Lgs. 81/08 Safety in the workplace

  • Emergency lighting system not present
  • The unit’s signs and indications are not complete L

D.P.R. 59/09 Building energy performance

  • Disconnector switch not present
  • Inlet water treatment system not present

 

PROJECT HIGHLIGHTS

In view of the irregularities encountered, the following remedial interventions have been planned:

  • Installation of dielectric joint on the gas pipe that comes out of the ground
  • Modification of the number of extinguishers
  • Installation of a self-closing system on the access door to the heating unit
  • Installation of emergency lighting equipment
  • Completion of the security signs and indications
  • Installation of new components for the treatment and conditioning of inlet water and system water

As a result of an energy analysis, the following energy refurbishment and efficiency interventions have been planned:

  • Installation of two new high-performance and low-emission condensation heaters with a capacity of 185kW
  • Installation of a heat exchanger to support the new generators
  • Installation of a magnetic dirt separator for cleaning the circuit
  • Installation of a heat meter
  • Replacement of the circulation electro-pumps for all circuits
  • Installation of a new remote control and supervision system that enables the accurate control of all the main parameters and the principle components in order to maximise the unit’s energy efficiency

ANALYSIS OF THE CURRENT STATE

The heating unit is located in a dedicated space separate from the building and on the ground floor; it is directly accessible from outside. The heating unit is powered by methane from the gas network: outside of the heating plant is a manual interception valve. The heat generators interface in a substation with two collectors that lead to the various heating circuits.

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

D.M. 12/04/96 Technical regulations for fire prevention at gas-powered systems

  • Self-closing device not present

D.Lgs. 81/08 Safety in the workplace

  • The signage is not complete

D.P.R. 59/09 Building energy performance

  • Disconnector switch not present
  • Appropriate inlet water treatment system not present

 

PROJECT HIGHLIGHTS

In view of the irregularities encountered, the following remedial interventions have been envisaged:

  • Installation of self-closing system for the access door to the heating unit
  • Completion of the security signs and indications
  • Installation of new components for the treatment and conditioning of inlet water and system water

As a result of an energy analysis, the following energy refurbishment and efficiency interventions have been planned:

  • Installation of two new high-performance and low-emissions condensation heaters with a capacity of 230 kW
  • Installation of a heat exchanger to support the new generators
  • Installation of a magnetic dirt separator for cleaning the circuit
  • Installation of a heat meter.
  • Replacement of the circulation electro-pumps for all circuits
  • Installation of a new remote control and supervision system that enables the accurate control of all the main parameters and the principle components in order to maximise the system’s energy efficiency

Resources

Articles, case studies and videos to use Enel X energy in the most efficient way

SHOWCASE FOR CITIES

The Enel X project in Bologna

Bologna's street lighting has gone smart

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