Member state ITALY
Case study Pomarance
Description Pomarance has 8 DH. They use steam at 60t/h to heat the city. The total networks are 60 MWth and supplies buildings and one industry. A flow rate regulating system saves 30 % of energy.
Region>City>location Tuscany>Municipality of Pomarance
Installed capacity
( MWth)
60MWth, referred to all GeoDH networks installed in the municipality of Pomarance
Installed geothermal capacity 60 MWth
DH length
100000m, referred to all GeoDH networks installed in the municipality of Pomarance
Inhabitants connected 2500
 Operating Temperature of the DH 120°C – 80°C
Temperature of the geothermal ressource
(production – injection)
Superheated steam at 190-220°C
Production of heating and/or cooling Heating only: 49,7 GWh/year in 2012
Investement for
geothermal well
Wells were already existing, since geothermal heat is provided from Enel Green Power wells dedicated to electricity generation 
Investement for
geothermal heating station
2,0Mio €
Investement for
DH network and substation
28,0Mio €
(banks, funds, PPP…)
“European funds: 20 Mio €
Local institutions funds: 1,5Mio €
Own funds / bank: the remaining amount”
Cost of the MWh sold 53-63€/MWh
Comparison with fossil energies  110-120€/MWh
Innovation if any Flow rate regulating on utilities. In intermediate seasons, the installation of regulating valves on 60% of the network, resulted in 30% of energy saving
Remote control: the system can be managed (including failure displaying) via smartphone, tablet, pc remote. This allows to have lower management costs.

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