The Earth may contain abundant geothermal resources, but the process of obtaining them and converting them into electricity is challenging and expensive. In the early 1970's, scientists studied hot water and hot dry-rock deposits as sources of geothermal power. Unfortunately, the high salt concentration of many reservoirs can easily corrode machinery, rendering it useless. We talked to researchers at the Lawrence Livermore Laboratory about a possible method for producing electricity from even the most concentrated brines. A mechanism called the "total-flow impulse turbine" would spray a mixture of brine and vapor against the turbine vanes to power the generator.
Read the full story in "Geothermal Energy....The Prospects Get Hotter"