Municipality of Casteggio

Municipality of Casteggio

Energy refurbishment and efficiency

What we are doing for the municipality

Casteggio is an Italian municipality of around 7,000 inhabitants in the province of Pavia. Situated in the Oltrepò Pavese area on the right bank of the Coppa River, a tributary of the Po, near where it joins the larger river on the plain. It is a municipality of more than 5,000 inhabitants with the highest average age (47.8) of the entire Lombardy region.

Through a methodological approach dictated by a natural predisposition for the management of issues linked to the energy refurbishment and efficiency, in the municipality of Casteggio we are carrying out interventions on the building-facilities systems and on the public lighting network.

Objectives:

  • Reduction of electric energy end heating consumption
  • Modifications of plants in line with current regulation
  • Maintenance of components for security purposes

In numbers:

  • Five Buildings made energy-efficient 

Find out the details of our refurbishment and energy efficiency projects

ANALYSIS OF THE CURRENT STATE

The heating unit is at the service of the buildings in question and located in the area behind the building, housed inside a room that is used exclusively for that purpose; it is directly accessible from outside.

The heating unit houses a 291 kW (heating capacity) STEP boiler powered by methane gas from the network. Outside the heating unit is a manual interception valve (with the related signage) on the pipe that connects the meter to the boiler.

The stretch of pipe that leads out of the meter, under the ground, emerging outside the heating unit is made of galvanised steel. It is not visible in the stretch below ground, nevertheless if it were made of tarred steel the tar would still be visible outside of the ground for a short stretch. Underground the laying of pipes with threaded joints (such as those that are galvanised) is not permitted but in order to be certain that these joints are present it is necessary to carry out a direct control in the field.

Outside the heating unit is positioned a fire extinguisher equipped with the appropriate signs and indications.

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 interception valve with a lateral pressure lever positioned upstream from the meter is not present
  • The casing for passing the pipe through the masonry is not present
  • The dielectric joint prior to the entrance and after the exit of the underground pipes is not present

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

  • The inlet water treatment system is not present

UNI 11528: 2014

  • The condensate neutraliser not present, neither for the boiler nor the chimney flue

EN 13384-1/08 Chimney dimensions and assessments

  • An adequate chimney flue in terms of height and structural supports is not present.

 

PROJECT HIGHLIGHTS

Interventions in line with regulations

  • Installation of interception valve with lateral pressure lever downstream from the meter
  • Installation of casing for the pipe’s passage through the masonry
  • Installation of dielectric joint on the gas pipe as it emerges from the ground
  • Installation of a release button
  • Installation of new components for the treatment of sewage and plant water
  • Installation of condensate neutraliser
  • Refurbishment of external chimney flue

Energy refurbishment and efficiency interventions

  • Installation of a new condensation generator
  • Installation of a magnetic dirt separator for cleaning the circuits
  • Installation of a heat meter
  • Installation of a boiler inlet tap
  • Pipe insulation.

ANALYSIS OF THE CURRENT STATE

Heating unit 1 (Casteggio Football Club– Changing rooms)

The heating unit serving the building in question is located in a room that is currently not used exclusively to house the unit but is, in actual fact, used as a storeroom by the football club. It is directly accessible from outside.

The unit is powered by methane gas from the network. Two DN32 pipes exit from the meter, one towards the heating unit in question and another to another unit. Both pipes, as they pass below ground, are made from galvanised steel and neither have dielectric joints.

The heating unit in question is composed of a floor-mounted boiler with an aspirated burner, which provides poor seasonal performance, and two autonomous gas boilers, both of which are aspirated.

The thermal capacity, in total exceeds 35 kW and therefore requires that the room in which the unit is located corresponds to the appropriate fire prevention regulations (D.M. 12/04/1996 e s.m.i.).

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 interception valve with a lateral pressure lever downstream from the meter is not present
  • Dielectric joints not present.
  • The room needs to be for the exclusive use of the heating unit

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

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

UNI 11528:2014

  • Condensate neutraliser not present either in the boiler or the chimney flue

D.P.R. n. 551 of 21/12/1999

  • The insulation of the pipes in the unit is either inadequate or not present

Heating plant 2 (Casteggio Football Club)

The heating plant serving the building in question is located on the ground floor and is adjacent to the building, inside a room that is currently used solely to house the unit; it is directly accessible from outside.

The heating unit is powered by methane gas from the network. A single pipe exits the meter and then leads to the two end uses.

A pipe in galvanised steel serves the kitchen. The other pipe, which is also in galvanised steel, enters a prefabricated box in which is located an autonomous gas boiler that serves the three showers.

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

  • Interception valve with lateral pressure lever downstream from the meter is not present
  • Dielectric joints not present

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

  • Appropriate water treatment system not present

D.P.R. n. 551 of 21/12/1999

  • The insulation of the pipes in the unit is either inadequate or not present

 

PROJECT HIGHLIGHTS

Interventions to bring the system into line with regulations

In this case alignment with the appropriate regulations was not considered in so far as the room currently housing the heating was not fit for purpose. Therefore the solution proposed during the refurbishment phase should correspond to the current regulations on this front.

Refurbishment and energy efficiency interventions

  • Installation of a new external wall-mounted condensation boiler
  • Installation of a condensate neutraliser
  • Installation of a magnetic dirt separator for cleaning the circuits
  • Installation of a diaphragm expansion tank
  • Installation of a water adduction system (softener and anti legionnaire’s disease treatment)
  • Installation of a solar boiler
  • Installation of a solar station
  • Installation of a solar panel
  • Installation of a heat meter
  • Installation of a boiler inlet tap
  • Pipe insulation

ANALYSIS OF THE CURRENT STATE

The heating unit serving the building in question is located in an external building separate from the Mairano elementary school, inside a room used exclusively to house the unit; it is directly accessible from outside. The heating unit is powered by methane from the gas network. Two pipes exit the meter compartment: one in steel that is entirely visible and serves the boiler in the heating unit, the other leads underground and, at the point in which it goes underground, is made of galvanised steel. The latter pipe is currently not being used.

Outside the heating unit there is neither an extinguisher nor adequate signage and the access door is overgrown with plants.

The heating unit consists of a floor-mounted boiler for the production of hot water (an open-chamber boiler with cast iron elements, presumably with poor seasonal performance). It is probable that the room previously housed a far more powerful boiler.

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

  • The interception valve with lateral pressure lever downstream from the meter is not present;
  • Dielectric joint not present
  • The pipes are in galvanised steel
  • Casings from the passage of the pipes through masonry not present

D.Lgs. 81/08 Security in the workplace

  • Release button not present
  • Signs and indications not present

UNI 11528:2014

  • Condensate neutraliser for the chimney flue not present

D.P.R. n. 551 of 21/12/1999

  • In adequate insulation of the pipes in the unit and those leading from the unit

 

PROJECT HIGHLIGHTS

Interventions for alignment with regulations

  • Installation of interception valve with lateral pressure valve downstream from the meter
  • Installation of dielectric joint on the gas pipe that emerges from the ground
  • Upgrading of the signs
  • Installation of new components for the treatment of inlet water and system water

Energy refurbishment and efficiency interventions

  • Installation of a new wall-mounted condensation boiler
  • Creation of a new methane gas connection
  • Installation of condensate neutraliser

ANALYSIS OF THE CURRENT STATE

The heating unit serving the building in question is located in a room used for exclusively this purpose with direct access from outside. It is adjacent to the Primary School.

Inside the unit are two heat generators powered by methane gas:

  • The first is a HOVAL condensation boiler, model ULTRAGAS AM-C (300) with a capacity equal to 300kW
  • The second is a BALTUR, which is not a condensation type generator, model D170 with a capacity of 288kW

The two burners for the heat generators are connected to two different gas meters.

The expulsion of fumes occurs through a single-walled (Ø 300 mm) steel connection, which joins a chimney made of reinforced concrete.

The thermo vector fluid produced is then sent to the heating elements through three different circuits, and each of these is propelled by an individual fixed speed GRUNDFOS electro-pump, the circuits as follows:

  • Circuit 1: Infant School;
  • Circuit 2: Canteen-Nursery;
  • Circuit 3: Elementary School.

The expansion of the thermo vector fluid caused by the temperature variation is compensated by a series of closed expansion tanks. The thermal insulation of the pipes occurs in part through PVC finished elastomer. There is no treatment system for the water in the plant.

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 interception valve with lateral pressure lever downstream from the meter is not present
  • Dielectric joints not present
  • Casings for the passage of pipes through the masonry not present

D.Lgs. 81/08 Security in the workplace

  • Release button not present;

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

  • Water inlet treatment system not present

EN 13384-1/08 Dimensions and assessments of the chimney flue

  • An adequate double-walled stainless steel chimney flue with insulation material is not present;

UNI 11528:2014

  • Condensate neutraliser for the chimney flue not present

 

PROJECT HIGHLIGHTS

Interventions to achieve compliance with regulations

  • Installation of interception valve with lateral pressure lever downstream of the meter
  • Installation of dielectric joint on the gas pipe that emerges from the ground
  • Casing for gas pipe as it passes through the wall
  • Installation of adequate double-walled stainless steel insulated chimney flue, equipped with features to extract fumes, thermometer and inspection window for the collection of condensate
  • Installation of manual water softener;
  • Installation of condensate neutraliser;

ANALYSIS OF THE CURRENT STATE

The heating unit serving the building in question is located on the semi-basement floor of the court building, inside a room used exclusively for the that purpose; it is directly accessible from outside.

The heating unit is powered by methane gas from the network. Outside the heating unit is the manual interception valve on the connection pillar but there is no interception valve on the gas pipes that feed the boilers. This type of layout is usually avoided for two reasons:

1 – In the case of it being closed, it would interrupt the gas flow to both devices

2 – The valve is not a type that can be moved quickly with a lever and therefore does not permit rapid intervention.

Outside the heating unit is a fire extinguisher but this lacks the appropriate signs and indications.

The unit contains a hot water generator, which serves the court building, and a wall-mounted boiler, which serves the voluntary association for the elderly. Both are powered by gas.

The expulsion of exhaust fumes takes place through single-walled steel pipes measuring respectively Ø 100 mm for the condensation boiler and Ø 80 mm for the wall-mounted boiler. It should be noted that at the top of the roof are two stainless steel pipes, and this gives the impression that these are entirely made of stainless steel from the heating unit right up to the outlet on the roof.

With respect 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 position of the external interception valve is not correct
  • The interception valve with lateral pressure lever downstream from the meter is not present
  • Casing for the passage of pipes through the masonry not present.

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

  • The system of inlet water treatment is not present

UNI 11528:2014

  • The condensate neutraliser is not present either for the boiler or the chimney flue

D.M. of 12/04/1996

  • The ventilation of the heating unit is inadequate

D.P.R. n. 551 of 21/12/1999

  • The insulation of the pipes in the unit should be assessed

 

PROJECT HIGHLIGHTS

Interventions to achieve compliance with regulations

  • Installation of a general fuel valve
  • Installation of an interception valve with lateral pressure lever downstream from the meter
  • Upgrading of the fume channels and installation of an element to extract fumes and a thermometer
  • Casing for the gas pipe as it passes through the masonry
  • Installation of a manual water softener
  • Installation of a condensate neutraliser
  • Upgrading of the ventilation surfaces

ANALYSIS OF THE CURRENT STATE

The heating unit serving the building in question is located on the semi-basement floor of the school building inside a room used exclusively for that purpose; it is directly accessible from outside.

The heating unit is powered by methane gas from the network. Two pipes lead out of the meter, one is a DN80 and leads to the main heating unit, the other is a DN50 that leads to an external combustion unit. Each stretch is buried and in tarred steel. Neither of the pipes in these stretches have dielectric joints.

Outside the heating unit is a fire extinguisher but this lacks the adequate signs and indications.

Inside the unit there is a gas-powered HOVAL hot water boiler that serves the school building.

The expulsion of exhaust fumes takes place through a steel single walled Ø 300 mm channel with an S-bend at the bottom.

At the Middle school there is an external heat generator serving the gym with a presumed capacity of 35kW (internal battery water/air: 32kW) and an air heater.

With respect 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

  • The interception valve with lateral pressure lever downstream from the meter is not present;
  • Dielectric joints not present

UNI 11528:2014

  • Condensate neutraliser not present for either the boiler or the chimney flue

D.P.R. n. 551 of 21/12/1999

  • Insulation of the pipes at the unit to be assessed

 

PROJECT HIGHLIGHTS

Interventions for alignment with regulations  

  • Installation of an interception valve with lateral pressure lever downstream from the gas meter
  • Installation of dielectric joint on the gas pipe as it enters the ground
  • Installation of dielectric joint on the gas pipe as it emerges from underground
  • Installation of dielectric joint on the gas pipe as it enters the ground
  • Installation of dielectric joint on the gas pipe as it emerges from underground
  • Installation of double-walled fume lines with insulating material, equipped with an element to extract the fumes, thermometer and inspection window for the collection of condensate
  • Installation of a condensate neutraliser.

ANALYSIS OF THE CURRENT STATE

The Certosa Museum complex (inc. Auditorium) has a heating unit (06A-Museum heating unit) that serves the museum and the wing of the restaurant, for both heating and cooling and an absorber (06B-Certosa - Auditorium heating unit) located outside within the walled perimeter that should serve the library, the custodian’s quarters and the Auditorium.

The 06A-Museum heating unit that serves the museum and the restaurant wing with heating and cooling is located on the ground floor inside a room used exclusively for that purpose; it is directly accessible from outside.

The heating unit is connected to an Air Treatment Unit positioned on the first floor of the museum area.

The heating unit includes a UNICAL boiler for hot water that serves the buildings in question, and this is gas-powered. Alongside the heating unit is a CLIMAVENTA evaporator.

The external absorber 06B- Certosa – Auditorium, which serves the library, the custodian’s quarters and the auditorium, is located outside behind the wall of the Certosa museum complex; it is fenced off with direct access from outside. The heating unit is connected to five Air Treatment units located:

  • Two in the basement;
  • Three in the attic space.

Near the ATU in the basement is located a substation with water softener

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 interception valve with lateral pressure lever downstream from the meter is not present
  • Dielectric joint not present
  • Casing for the passage of pipes through the masonry not present

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

  • The inlet water treatment system is not present (06A - Museum)

EN 13384-1/08 Dimensions and assessments of chimney flue

  • A double-walled stainless steel insulated chimney flue is not present

UNI 11528: 2014

  • Condensate neutraliser not present

D.P.R. n. 551 of 21/12/1999

  • The insulation of the pipes in the unit is not adequate (06A - Museum).

 

PROJECT HIGHLIGHTS

Interventions to achieve compliance with regulations

  • Installation of interception valve with lateral pressure lever downstream from the meter
  • Installation of dielectric joint on the gas pipe as it leaves the ground
  • Casing for the gas pipe as it passes through the masonry;
  • Installation of an adequate double-walled stainless steel insulated chimney flue equipped with an element to extract fumes, thermometer and inspection window for collecting the condensate
  • Installation of a manual water softener
  • Installation of a condensate neutraliser

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