Dear EarthTalk: How are heating, cooling and electrical energy produced by geothermal energy? I never comprehend how it functions.
Flash power plants – Some geothermal reservoirs generate mostly hot water (‘hot water-dominated reservoirs’) with a temperature ranging amongst 150 and 370 oC. This water can be brought up to the surface and ‘flashed’ into steam (see Figure above) for use in a generator to produce electrical energy. No pollution is made, and no fuel is required to energy the station (energy to run pumps in residential household systems can be captured by the energy it creates), it is definitely a renewable clean energy.
The speakers contain HECO Senior Vice President Jim Alberts, HECO Vice President Colton Ching, Hawaii Gas President & CEO Alicia Moy, Hawaii Public Utilities Commission Commissioners Mike Champley and Lorraine Akiba and former Public Utilities Commission Chair Hermina Morita. At present, two sorts of geothermal resources can be used in binary cycle power plants to create electrical energy: enhanced geothermal systems (EGS) and low-temperature or co-produced sources.
In 2010, the hot water production started when 3 thermal power plants have been put online, reaching a production of 133 Megawatts. At the end of the year 2011, two higher pressure 45 Megawatts turbine were added to Hellisheidarvirkjun energy station, this addition becoming the final stage of the expansion of the power plant. The Department of Land and Organic Resources (Division) supports this measure and offers the following comments.
A geothermal firm wanting to secure the rights to a thermal deposit would have to compete with oil and gas corporations for the subsurface permit, since there is no separate program for geothermal, says Dunn. The Shepard natural gas energy plant in Calgary started operating this year with a total cost of $1.4 billion for 800 megawatts of electrical energy In this comparison, the geothermal facility fees three times as considerably per megawatt of energy.