Down-Hole Heat Exchangers: Modelling of a Low-Enthalpy Geothermal System for District Heating

Table 1

Data of the main thermal springs in the province of Viterbo [8].

Spring or group of springs	Name	Elevation (m a.s.l.)	Discharge (l/s)	Temperature (°C)
3	Bagnaccio	310–390	10	38–64
4	Monterozzo	305–319	5	27–51
7-8	Zitelle	289–308	6.5	39–65
9	Carletti	285	1.5	57
10	Bullicame	298	10.4	57
17	S. Cristoforo	245	0.1	53
21	S. Sisto	230	3	57
26	Bacucco	315–320	2	36–49
27	Urcionio	305–319	20	28–60