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High temperature energy storage, ship propulsion

We have been designing and installing  initial applications for high temperature power storage, ranging from 110 MW, up and down.  These can be charged with electricity from power supplies, or other heat options.  They operate at approximately 1,800. C, and we also have heat tubs to replace steam transmission at up to 6,000.C at around a 5 MW rate.  The power density of these units is greater than coal be by approximately 3x. 


We intend to use these units in shipping by interfacing flash steam units and then entering turbines or existing steam engines.  No additional modifications of vessels is needed, and the units can be placed throughout the ship- connected by heat transfer units,  or in one location.


The intention is to 100% replace fossil fuels for ship propulsion with energy generated by sources such as solar, windmill, or water. Our current designs are for a 6,000. ton, 400' transfer vessil to run approximately 400 miles/charge unit at 5MW/hr and a speed of approximately 15 knots.


What practical problems do you forsee for this kind of application?  


We anticipate that the storage units will last for 50 years, and the power generation cost will depend upon the generation source used.  The transfer efficiency from power source to storage units is a bit over 98%.  


What do you think.  Would Cat be interested?