Comments on: Gravity Energy Storage For The Electricity Grid http://cleantechnica.com/2013/04/02/gravity-energy-storage-for-the-electricity-grid/ Clean Tech News & Views: Solar Energy News. Wind Energy News. EV News. & More. Sun, 28 Dec 2014 14:06:00 +0000 hourly 1 http://wordpress.org/?v=4.0.1 By: Maik (germany) http://cleantechnica.com/2013/04/02/gravity-energy-storage-for-the-electricity-grid/#comment-202549 Wed, 08 Jan 2014 10:07:00 +0000 http://cleantechnica.com/?p=50261#comment-202549 here it is: http://eduard-heindl.de/energy-storage/

]]> By: Bob_Wallace http://cleantechnica.com/2013/04/02/gravity-energy-storage-for-the-electricity-grid/#comment-157301 Fri, 05 Apr 2013 20:04:00 +0000 http://cleantechnica.com/?p=50261#comment-157301 There’s another system being investigated in which a large concrete weight is moved in a column water. That avoids the friction loss of hauling a weighted “train” up a track.

It also requires less land. Just enough for a big hole in the ground.

]]> By: Captain Obvious http://cleantechnica.com/2013/04/02/gravity-energy-storage-for-the-electricity-grid/#comment-157101 Thu, 04 Apr 2013 00:31:00 +0000 http://cleantechnica.com/?p=50261#comment-157101 Water would seem easier and cheaper.

]]> By: Bill_Woods http://cleantechnica.com/2013/04/02/gravity-energy-storage-for-the-electricity-grid/#comment-156954 Tue, 02 Apr 2013 17:46:00 +0000 http://cleantechnica.com/?p=50261#comment-156954 “A large-scale system of this type that could provide 500 MW of power
(the energy storage capacity was not stated) would require about 8 miles
of track.”

Potential energy = mgh. Eight miles of 8% grade is an elevation difference of 1 km. A 100-tonne rail car raised an elevation of 1 km will store 1e9 W-s. Enough to generate 500 MW for 2 seconds.

]]> By: Matt Grason http://cleantechnica.com/2013/04/02/gravity-energy-storage-for-the-electricity-grid/#comment-156920 Tue, 02 Apr 2013 13:44:00 +0000 http://cleantechnica.com/?p=50261#comment-156920 Brilliant in its elegance.

]]> By: Karl-Friedrich Lenz http://cleantechnica.com/2013/04/02/gravity-energy-storage-for-the-electricity-grid/#comment-156893 Tue, 02 Apr 2013 07:58:00 +0000 http://cleantechnica.com/?p=50261#comment-156893 The London subway has operated on that principle since 1863, with stations elevated relative to tracks between stations.

One could also try to use elevators with this idea. Transport weights up in time slots where electricity is cheap, and down when it is expensive.

]]> By: geoffderuiter http://cleantechnica.com/2013/04/02/gravity-energy-storage-for-the-electricity-grid/#comment-156891 Tue, 02 Apr 2013 07:43:00 +0000 http://cleantechnica.com/?p=50261#comment-156891 Fill that train with used Li-ion or Lead acid batteries and you can have double plus energy!

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