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Contenuto archiviato il 2022-12-27

HEATING AND SANITARY WATER PROVISION FROM GEOTHERMAL RESOURCE

Obiettivo

To heat and provide domestic hot water to a group of existing buildings and a hotel using a low temperature geothermal resource.
Expected annual energy savings are 770 TOE. Payback is projected at up to 20 years.
The geothermal water will be taken from an existing spring producing 20 m3/h at 45 deg. C, and three production wells drilled to between 80 and 200 m which will supply 90 m3/h at 32 deg. C. All the warm water will be used by electrically driven heat pumps (460 kW). Two gas driven motors are also planned which will produce 770 kVA.
This will be used to drive the heat pumps and the surplus distributed to consumers. It may be possible to recover heat generated by the motors to increase the water temperature by using a heat pump circuit.
Phase 1 (geological study and experiments with the downhole exchanger) have been completed. Completion of Phases 2 and 3 (teleheated network connection to consumers and completion of heat station) is also due. Tests of the pilot downhole exchanger have demonstrated that the forecasted thermal power is produced.
Energy savings of about 76 TEP (1987-1988) are to be compared with the 770 TEP expected in 1983. The heat consumption of the connected consumers is much lower than expected (the practice of burning wood is still common) and the installation is running at only 20% of its capacity.
The well BR 3 produces 90 m3/h of water at 32 deg.C. The heat of the well BR4 is exploited through a geothermal convector. The hydrogeological study showed the necessity of placing the down-hole exchanger at a depth of 41 - 44m. This is a stainless steel exchanger of 180mm diameter. The heat produced by the geothermal convector is passed to a ventilating convector.
The primary circuit is made of two heat pumps with a total power of 1,680 Mcal/h. The electricity needed by the heat pumps is produced by a cogeneration station of 0.6 MW fed by natural gas. The total installed power is 7,100 Mcal/h supplying 7 hotels, public buildings, one swimming pool and 157 private dwellings representing a theoretical overall consumption of about 5,000 Mcal/h.

Argomento(i)

Invito a presentare proposte

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Meccanismo di finanziamento

DEM - Demonstration contracts

Coordinatore

Comune di Bagno di Romagna
Contributo UE
Nessun dato
Indirizzo
Via Cesare Battisti 69
47026 Bagno di Romagna
Italia

Mostra sulla mappa

Costo totale
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