:) On 10/10/18, John Ferrell wrote: > https://electronics.howstuffworks.com/gadgets/clocks-watches/clock2.htm > > Don't bother with a patent. > > > On 10/4/2018 6:32 AM, RussellMc wrote: >> Concrete weights stacked to store energy and destacked to provide output= .. >> It works (of course) but will have difficulty being cost competitive wit= h >> other storage technologies. >> >> >> https://qz.com/1355672/stacking-concrete-blocks-is-a-surprisingly-effici= ent-way-to-store-energy/ >> >> Claimed end to end efficiency is around 85%. >> LiIon efficiency said to be around 90%. (Actual figure depends on method= s >> of charge/discharge). >> >> ________________________________ >> >> A "train" (or multiple units) on a track with cable connection may allow >> improved ease of charge/discharge. >> Energy storable per mass is less per distance moved due to non-vertical >> track, but can make use of long slopes. >> The excessively enthused could move 'wagons' sideways at top and bottom >> to >> increase capacity. >> >> A single looped cable would allow multiple 'wagons' to be pulled up or t= o >> descend using existing chair-lift type coupling/decoupling. >> >> Masses & heights involved are "somewhat daunting" >> >> 1 kWh =3D 3,600,000 watt-seconds >> ~=3D 360,000 kg.m (100% efficiency) =3D eg >> 360 tonne x 1m >> 36 t x 10m >> 3.6t x 100m >> 360 kg x 100 x 10m >> 36 kg x 1000 x 10m >> ... >> >> >> >> Russell > > -- > John Ferrell W8CCW > Julian NC 27283 > It is better to walk alone, > than with a crowd going the wrong direction. > --Diane Grant > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .