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Geothermal

U.S. Geothermal Resources Could Replace Coal 10 Times Over


A new map of geothermal energy potential released by Southern Methodist University is the result of years of research funded by Google.org.  The map (click here to download and view in Google Earth) shows that there are enough viable geothermal resources in the U.S. to replace the current coal power capacity ten times over.

Last year, SMU gave us a sneak peak of the research they've been doing by releasing a geothermal energy potential map for West Virginia.  Surprisingly, the state is a hot spot for geothermal energy recovery, a wonderful development in an area where coal power has dominated for a long time.

The study limited its analysis to the top 6.5 km of the earth's crust to accurately portray what was actually drillable, recoverable energy.  When the researchers applied limits to depth and excluded areas that were inaccessible due to being in large urban areas or national parks, the technical potential versus theoretical potential for geothermal energy production was revealed.  The technical potential was about 14 percent of the theoretical potential, yet still enough to crush our current coal power capacity ten times over.

via Climate Progress

 

Canada's Geothermal Resources Could Power the Country One Million Times Over


Canada's federal Geological Survey Commission has released a report stating that the country's geothermal resources are so vast that they could power the country one million times over.

Heavy concentrations of geothermal stores near the surface in the Northern and Western parts of Canada (including British Columbia, Alberta, the Yukon and Northwest Territories) are the stars of the new report, though resources exist across the country.  A team of scientists from the agency said that as little as 100 projects could completely power the country while generating very few greenhouse gas emissions.

Geothermal has its downsides, like high upfront costs and long construction times because of the tricky nature of drilling miles into the earth, but once a geothermal plant is operational, the energy is practically unlimited and -- unlike wind and solar -- constant.

Countries like Iceland, Indonesia and St. Lucia have started relying on and even exporting energy from their large geothermal resources.  Canada could easily be next.

via Montreal Gazette

 

Big Island of Hawaii Gets 20% of Its Electricity from Geothermal Plant


A geothermal plant on Hawaii's Big Island is providing 20% of that islands electricity needs, with additional capacity in the works.

The Puna Geothermal Venture is run by Ormat Technologies and is located in the Mt. Kilauea East Rift zone.  The plant has five wells that bring up 650-degree geothermal fluids to the surface where the steam is separated out and used to drive generators.  The plant also captures waste heat from the primary circuit with fluid pentane to increase power output and efficiency.

The plant is currently contracted to provide 30 MW of electricity to Hawaii Electric and Light through 2030, but is looking to add another 8 MW of capacity soon, as well as building new reservoirs off the coast of Maui and near Mt. Hualalai to expand its electricity coverage across the islands.

With the vast amount of geothermal energy in the area, Hawaii could easily get most of their electricity from these sources within the near future.

via Cleantechnica

 

Google Data Center Cooled with Ocean Water

Google has opened a new data center in Finland where all of the cooling is done with sea water rather than compressors and refrigerants. The building, which was originally built as a paper mill, is located on the Gulf of Finland and using cool sea water is a way to save money while keeping the building cooled with a readily available resource.

Cooling is one of the biggest expenses for data centers. Servers, especially when many of them are stacked close together, generate a great amount of heat, and that heat must be dissipated to keep the equipment running. The Google data center brings in sea water through granite tunnels and into heat exchangers where the water absorbs the heat to keep the equipment cool.

The heated water is further tempered with cool sea water in a separate building before it is returned to the ocean to minimize the impact the heated water might have on the natural environment.

hat tip: @SomeChum

 

Portland, ME Airport to Use Geothermal Heating

Portland, Maine is expanding its airport and with the renovation comes a new geothermal system for heating and cooling. The builders estimate the system will save the airport 50,000 gallons in heating oll a year.

The system will consist of a 120 wells and a series of fluid-filled pipes running about 500 feet under an employee parking lot. The parking lot will act as a heat sink and underground temperatures should stay at around 55 degrees year-round. In the summers, the fluid in the pipes will help provide cooler air to the airport, while in the winter, the fluid will help heat the air to 55 degrees before the building's heating system takes over.

The reduction in heating oil use will amount to a significant energy bill savings for the airport --about $200,000 a year and over $8 million over the life of the system.

The airport funded the installation of the heating system with a $2.5 million grant from the Federal Aviation Administration's Voluntary Airport Low Emission program.

via U.S. DOT Blog

 
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