Hot Rocks!!! EarthCache
cachincallisters: Archiving this cache as I no longer live in the area, so cannot check on what is happening in the area.
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Rosemanowes Quarry, is a site used to experement with geothermal
energy, doing this earth cache you should find out some of the
history of the site and geothermal energy.
This site was chosen as an area to experiment with geothermal energy because the granite in the area has the highest heat flow in England (120 milliwatts per square metre).
The trials began in 1977 in the wake of the 1973 oil crisis and an earlier trial in the United States at Fenton Hill. It concluded in 1980, although studies continued until 1991. Funding for the initial project was provided by the Department of Energy (now the Department of Trade and Industry) and by the European Commission. The research facilities and staff transferred to Camborne School of Mines Associates Limited in 1992, the trading arm of the Camborne School of Mines.
The project had two aims:
1) To see if hot dry rocks could be fractured by water pressure alone, enabling a current of cold water from an inlet borehole to pass easily through the mass and to be collected at an outlet borehole some distance away. The trial proved to be successful, and showed that explosives were not required to fracture this Cornish hot granite at depth.
2)To find out if the rocks were hot enough to make steam for a turbine to generate electricity. This second aim was not achieved at the depths attained. Though the rocks did yield substantial quantities of hot water, to reach a temperature to generate steam hot enough to drive a turbine would have required drilling a further kilometer or more into the granite, an option which was too expensive to pursue at that time.
With government and EU support the expertise of the scientists and engineers at Rosemanowes was used to support the European HDR project at Soultz-sous-Forêts and a number of commercial contracts ensued exploiting HDR techniques, such as microseismic monitoring, in the oil and gas industry. Rosemanowes Quarry and the assets of CSMA, including intellectual property, were acquired by Asea Brown Boveri in 1997. In 2004 Schlumberger acquired the intellectual property and some of the staff most closely associated with microseismic monitoring and the quarry was sold off.
In 2006, the site was acquired by 3K Facilities. The company now offers deep borehole test facilities in one of the most well logged sites in the world. All the deep boreholes are now available to hire for a range of down hole testing. There are three deep boreholes (2350m, 2180m, 2800m), four uncased 300m holes and one 150m hole inclined at 30degrees, as well as micro seismic testing and a wind turbine test environment on this 20 acres (81,000 m2) site.
Although the energy has not yet been exploited commercially, the data provided by the tests has been widely used to test numerical simulation codes. The dataset contributed significantly to the geothermal power plant built with European Union sponsorship at Soultz-sous-Forêts.
To claim this cache please go to the above co-ords and:
1 Take a photo of yourself stood as close as possible to the bore hole test facility. On days when the Portuguese Connections shop is open you will be able to go right up to the bore hole, but on days when it is closed you will have to stay behind the gates to get your photo.
2 Estimate how high the bore hole tower is and e-mail us the answer.
3 Estimate the diameter of the hole bored down into the ground e-mail us the answer.
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Treasures
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