NARNI (TR) M U N I C I PA LI TY A DM I N I S TR A TI ON - C OM BI N E D S C H OOL
INS TITUTE L U I G I V A L L I - N A R N I S C A L O ( TR )
NARNI MUNICIPALITY (TR)
REGENERATION OF THE TECHNOLOGICAL AND ENERGY
HEATING SYSTEMS PERFORMED
CLIENT
Narni (TR) Municipality Administration - Combined School Institute Luigi Valli Narni Scalo (TR)
S P ECIFIC P ROBLE M S
SEDE LEGALE
Via del Rivo, 40
05100 TR (Italy)
L’Istituto Comprensivo Luigi Valli, è un complesso di tre edifici adiacenti tra loro.
Tel. +39 0744.402359
Gli edifici ospitano le seguenti scuole: Scuola Media Luigi Valli, Scuola
Fax +39 0744.402359
Elementare Sandro Pertini e Scuola Materna Rodari.
The Luigi Valli School Institute complex consists of three buildings that are
SEDE AMMINISTRATIVA
situated next to one another. The buildings house the following schools: Scuola
Via Armando Cingolani, 3
Media Luigi Valli [High School], Scuola Elementare Sandro Pertini [Primary
62019 Recanati, MC (Italy)
Tel. +39 071.7578011
School] and Scuola Materna Rodari [Infant School].
Fax +39 071.7578777
Three separate Central Heating Units supply the three buildings.
C.P.M. GESTIONI TERMICHE
Partita IVA 01014090433
Codice fiscale 01014090433
[email protected]
The main problems identified included:
outdated heat generator: in particular, the apparatus dated back to the
early 90s and gave a fairly low output which worsened the average
seasonal performance of the building;
the distribution of the circuits and, in particular, the lack of control
devices for each individual area made heat distribution and control of the
various areas considerably inefficient;
the electric ventilation pumps on the individual circuits did not comply
completely with the new ErP directive, according to which the use of
electronic controls on each electric motor is mandatory, or in any event
the pumps must comply with the directive.
CP M S OLUTION
The following interventions were carried out in compliance with the Ministerial
Decree of 12.04.1996 on fire prevention, with the Ministerial Decree 01.12.1975
INAIL (formerly ISPESL) and the Presidential Decree 412/96 and subsequent
amendments and supplements. The above mentioned interventions were the
result of the interventions performed on the technological regeneration aspect,
such as the centralisation of the heating system, for which a single central
heating unit was built serving the school complex, a pumping sub-station was
built in the former central heating units, a co-generator was installed and a
district heating line was created to transport the thermal carrier fluid to the
pumping substation.
The existing heat generators were replaced with an YGNIS Varino condensation
heat generator with a power of 511 kW. The new top-of-the-range generator
guarantees excellent efficiency and limited maintenance, apart from the regular
maintenance required by the manufacturer.
A TEDOM Micro T25 co-generator was installed, with a thermal potentiality of 47
kW and an electrical potentiality of 25 kW. The school buildings use the electric
energy produced by the “heat tracing” co-generator to supply the electrical
system in the buildings, whereas the heat produced by the motor is recovered
and sent to the heating system to supplement the heat produced by the heat
generator. The district heating system, that transports the thermal carrier fluid,
connects the central heating unit and the relevant sub-stations.
RESULTS
SEDE LEGALE
Regeneration of the system by replacing the boiler gave the following advantages:
Via del Rivo, 40
05100 TR (Italy)
Tel. +39 0744.402359
Functional benefits;
Fax +39 0744.402359
energy-saving benefits;
technical-economic benefits;
ecological benefits;
SEDE AMMINISTRATIVA
Via Armando Cingolani, 3
This translates into
62019 Recanati, MC (Italy)
Tel. +39 071.7578011
Increased system efficiency and reliability;
Fax +39 071.7578777
Reduced maintenance costs;
C.P.M. GESTIONI TERMICHE
The new generator enables optimum use, thanks also to a complete, flexible
Partita IVA 01014090433
burner,
Codice fiscale 01014090433
[email protected]
with an oxygen probe for flame control, with a subsequent reduction in the
maintenance required.
The energy benefits obtained are due to the reduction in thermal energy and
electricity consumption. The achievable figures show 1 TOE/year, 80,000 kWh,
which corresponds to a reduction in primary energy of 15%/year.
ECO- ENERGE TI C R E S U L TS - TOTA L
3 5 7 . 6 TON
15 2 . 2 TE P
191140 0 kW h
SEDE LEGALE
Via del Rivo, 40
05100 TR (Italy)
Tel. +39 0744.402359
Fax +39 0744.402359
SEDE AMMINISTRATIVA
Via Armando Cingolani, 3
62019 Recanati, MC (Italy)
Tel. +39 071.7578011
Fax +39 071.7578777
C.P.M. GESTIONI TERMICHE
Partita IVA 01014090433
Codice fiscale 01014090433
[email protected]