
Enel Green Power inaugurated two geothermal power plants in Nevada (US), on April 17. The total capacity of the two plants is 65 MW, which is enough to power about 40,000 households, generating some 400 TWh annualy. The plants are also a significant move towards achieving Nevada's energy goal which is to generate 20% of electricity from renewable resources by 2015.
The addition of the new plants, Stillwater and Salt Wells, quadruples the total amount of geothermal electricity produced by Enel Green Power in the US.
Both plants are medium enthalpy plants, which means water pumped from underground is at temperatures between 130 and 150 degrees Celsius. The heat from the heated water is transferred onto a working fluid (in this case isobutane), which in turn powers steam turbine generators. Water is returned underground, and the working fluid remains in the closed loop process, eliminating the possilibility of leaking into the environment. Additional benefits of these two plants come to the local community, in form of 25 permanent jobs, after having created more than 300 temporary jobs during construction earlier.
Enel Green Power also has installations in Italy (Tuscany, about 700 MW), but also in South and Central America (Chile, El Salvador).
The new wind farm developed by
One of the major obstacles for introducing renewable energy power to general consumers is the problems that come with electric grid integration, due to the specific regime in which renewable energy sources can be exploited (intermittance, energy storage). The latest NERC (




