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Foras & Enel Green Power: A Long-Standing Partnership Driving Geothermal Innovation in Tuscany

Location: Italy

Year: 2016

Application: Geothermal Energy

Foras & Enel Green Power: A Long-Standing Partnership Driving Geothermal Innovation in Tuscany

In the heart of Tuscany, Italy, lies one of the most advanced geothermal energy districts in the world—operated by Enel Green Power, the national leader in renewable energy. This region is home to over 70 geothermal power stations, generating around 1.5 GW of electricity, which meets nearly 30% of Tuscany’s total energy demand. At the core of this green revolution, Foras plays a vital role by providing robust and reliable industrial pumping solutions tailored to the extreme conditions of geothermal applications.


With over 20 years of experience in the geothermal sector and a 15-year collaboration with Enel Green Power, Foras has developed a unique line of pumps capable of handling highly challenging conditions such as chemically aggressive fluids and extreme temperatures. Our solutions are the result of hands-on experience and a continuous drive for innovation in the renewable energy industry.

Production Well and Injection Well Foras
Once the process of energy production is completed, about 60% of the geothermal steam is re- condensate into water and collected to be re-inject underground, to feed the wells for news team production. Multistage Foras pumps are used to feed the wells with that re-condensed water.


Customized Pumping Solutions for Geothermal Energy

The geothermal energy process in Tuscany involves drilling wells up to 6,000 meters deep to access high-temperature underground steam—typically ranging from 160°C to 200°C and pressures between 5 and 10 bars. This steam is transported via stainless steel pipelines to the power stations, where it is converted into electricity using steam turbines. Foras pumps are integrated into several critical phases of this energy conversion cycle:

1. Boosting Steam Pressure

When steam pressure drops below turbine requirements, Foras End-Suction Pumps are used to re-pressurize the steam, ensuring optimal turbine performance.

2. Re-Injection of Condensed Water

After energy production, around 60% of the steam is condensed into water and re-injected into the underground wells to maintain sustainable steam extraction. Foras Multistage Pumps are responsible for this high-pressure re-injection process.

3. Chemical Cleaning Process (AMIS Phase)

During specialized cleaning operations, Foras pumps handle condensed water mixed with high concentrations of caustic soda, demonstrating excellent chemical resistance and durability.

This pump is part of the pumping system made of 3 units which re-inject the condensate water
Foras pump model HP 100-4 is part of the pumping system made of 3 units which re-inject the condensate water, at about 85°C into the feeding wells.

Foras Pumping Systems in Action

  • Material: Cast stainless steel AISI 316

  • Flow rate: 250 m³/h

  • Head pressure: 200 m

  • Motor power: 160 kW

  • Purpose: Part of a 3-pump unit for condensate water re-injection at 85°C

  • Pumps: 3 x End-Suction CAX150-400 (75 kW), 2 x Multistage HPR 125/5 (90 kW)

  • Capacity: 1200 m³/h at 150 m head

  • Material: AISI 316 stainless steel

  • Feature: All pumps are managed by Variable Speed Controllers for precision

Case 3: Lago Boracifero Re-Injection Station

  • Location: Larderello geothermal field

  • Setup: 4 x HP125-2 pumps

  • Motor power: 315 kW each

  • Flow rate: 350 m³/h per pump at 220 m head

  • Advantage: Stable operation for over 10 years, supported by annual maintenance and no critical failures


pumping station for well re-injection, located in Lago Boracifero into the Larderello area
The picture shows another pumping station for well re-injection, located in Lago Boracifero into the Larderello area. In this site there are about 180 suction wells which are used to feed 26 local power stations.

pumping station made of 3 End-Suction pumps model CAX150-400 with 75Kw motor and 2 multistage pumps model HPR 125/5 with 90Kw motors
Below picture shown a Foras pumping station made of 3 End-Suction pumps model and 2 multistage pumps model HPR 125/5 with 90Kw motors. All the pumps are controlled with Variable Speed Controllers




Bring Foras Innovation to Your Energy Projects

At Foras, we bring proven expertise, reliability, and innovation to every project we touch. Whether you're working in geothermal energy, industrial water treatment, or other complex fluid handling applications, our pumps are engineered to perform under pressure.


Ready to power your project with precision and performance?

Contact us today to discuss your needs and discover the Foras difference.




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