http://montaraventures.com/blog/2007/01/30/enormous-geothermal-canal-proposed/ Mike Harding's Blog Fri, 05 Dec 2008 01:07:48 +0000 http://wordpress.org/?v=2.6.1 http://montaraventures.com/blog/2007/01/30/enormous-geothermal-canal-proposed/#comment-5315 green.mnp » Blog Archive » New England Geothermal Thu, 01 Feb 2007 19:27:04 +0000 http://www.montaraventures.com/blog/?p=297#comment-5315 [...] atlanticgeothermal.blogspot via montaraventures Social Bookmark This Post:These icons link to social bookmarking sites where readers can share and discover new web pages. [...] [...] atlanticgeothermal.blogspot via montaraventures Social Bookmark This Post:These icons link to social bookmarking sites where readers can share and discover new web pages. [...]

]]> http://montaraventures.com/blog/2007/01/30/enormous-geothermal-canal-proposed/#comment-5097 mike Wed, 31 Jan 2007 14:23:03 +0000 http://www.montaraventures.com/blog/?p=297#comment-5097 Good point Rick, the technical challenge of getting a cavern that large at that depth is huge. Also interesting to note that it might have to be deeper - Reynolds does specify 3-5 miles in his entry as I recall. Good point Rick, the technical challenge of getting a cavern that large at that depth is huge. Also interesting to note that it might have to be deeper - Reynolds does specify 3-5 miles in his entry as I recall.

]]> http://montaraventures.com/blog/2007/01/30/enormous-geothermal-canal-proposed/#comment-5061 Rick Wed, 31 Jan 2007 00:57:34 +0000 http://www.montaraventures.com/blog/?p=297#comment-5061 A complication with Reynolds' concept is that you'd probably have to case the tunnel to keep it from collapse under lithostatic pressure - there will be, after all, a 3 miles or more of rock bearing down on the tunnel walls. This means 80-100 miles of very large diameter casing (for the oil/gas/geothermal industries). Sound pricey, compared with the EGS proposal of a few dozen wells drilled to 3 km (actually, the MIT study says you might have to go deeper on the east coast; the Conway, NH, case study says 7 km, or about 4.5 miles, for 200 C temperatures, based on existing wells surveys). A complication with Reynolds’ concept is that you’d probably have to case the tunnel to keep it from collapse under lithostatic pressure - there will be, after all, a 3 miles or more of rock bearing down on the tunnel walls. This means 80-100 miles of very large diameter casing (for the oil/gas/geothermal industries). Sound pricey, compared with the EGS proposal of a few dozen wells drilled to 3 km (actually, the MIT study says you might have to go deeper on the east coast; the Conway, NH, case study says 7 km, or about 4.5 miles, for 200 C temperatures, based on existing wells surveys).

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