Geothermal energy electricity generation

DiPippo, R. 1991. Geothermal energy - Electricity generation and environmental impact. Energy Policy, October 1991, 798-807. 

What are two potential pollution problems that accompany the use of geothermal energy to generate electricity ... 

Fig ure 3-10. One of eight generator-loaded Rotoflow expanders used to convert geothermal energy to electricity. 

Renewable electricity (RES-E) Electricity generated from renewable non-fossil energy sources, i.e., wind, solar, geothermal, wave, tidal, hydropower, biomass, landfill gas, sewage treatment plant gas and biogas (this corresponds to the definition in Directive 2001/77/EC on renewables, Article 2). 

The water in rivers and streams can be captured and turned into hydropower (HP), also called hydroelectric power. HP currently provides about 17% of the world s electricity supply, virtually all of Norway s electricity and more than 40% of the electricity nsed in developing countries. However, there is great potential in hydropower worldwide. Norway produces more than 99% of its electricity with hydropower. New Zealand nses hydropower for 75% of its electricity. HP provides more than 97% of all electricity generated by renewable sources. Other sources, biomass, geothermal, solar and wind account for less than 3% of renewable electricity production. When the electricity share of total energy consumption is considered, the increase becomes even more dramatic. 

Utilization of geothermal energy is of two types, electric power generation and direct use of the heat. In geothermal electric power plants, steam is used to drive turbines in much the same way as in conventional fossil fuel plants. The main difference is that in fossil fuel plants the steam is generated by boiling water by... 

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