Underwater Fuel Storage 



Another Eavy need is fuel storage for underwater facilities. A 

 system can be envisioned whsrs an underwater facility is s-.-pplled by two 

 hoses: one carrying hydrogen and the other carrying oxygen or air. 

 Small metal hydrida units could te used to supply and store hydrogen for 

 nobile units and for the container itself. Other methods would be used 

 to store the oxygen or air. Fuel cells could supply any necessary 

 electric power to the facility, and the heat given off during hydrogen 

 absorption could be used to heat the facility. A small hydride contain- 

 er could be carried (along with an oxygen bottle, perhaps) to provide 

 the hydrogen and oxygen for a fuel cell which would generate power for a 

 nobile unit. In the case of a breakage in the umbilical tube, the 

 facility co*ild continue to function on stored oxygen and hydrogen. 



Heat and Fuel Storage for a Closed-Cycle Engine 



One solution to the problem of energy storage and.waste heat 

 disposal for installations such as in Project Sanguine is the use of 

 hydrogen for fuel and metal hydrides for storage. Since the metal 

 hydrides must absorb heat during the generation of hydrogen, this heat 

 can be supplied by the exhaust products of combustion. The products of 

 combustion of hydrogen and oxygen are just heat and water, thus the 

 additional problem of toxic gases is eliminated. Metal hydrides can be 

 chosen to absorb sost of the excess heat so that only a small asount 

 would have to be disposed of in other ways. 



Mobile Heat and Fuel Storage 



For mobile systems which have access to ataospheric oxygen, only 

 the metal hydride would need to be carried. Such systems could generate 

 hydrogen using the exhaust heat from the engine itself or if fuel cells 

 were being used, a small amount of the hydrogen produced could be burned 

 to produce the needed heat for the desorption of the hydrogen. During 

 recharoe the heat released by the absorption of the hydrogen could be 

 used to heat buildings or water or to run an absorption cooling process. 

 In tnis way the available energy would be used -ore completely, first by 

 heating the buildings or water during the absorption step and second by 

 producing h/drogen to power engines during the desorption step. 



Heat Pump 



As shown in Appendix A, an analysis indicates that metal hydrides 

 may provide a Beans to pump heat nore efficiently than present-day heat 

 pumps. One method of accomplishing this is with two hydride containers. 



Navy's underground communication system. 



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