■ . - . . _ . . - , 



Finally, several uses of aetal hydrides have been suggested and 

 several conceptual designs of heating and cooling systems have been 

 aade. 



RECOMMENDATIONS 



Considering the great usefulness and applicability of hydrogen as a 

 fuel and the ability of metal hydrides to store hydrogen at low pres- 

 sures and with little energy loss, it is recommended that: 



1. Experimental work be performed to determine the thermal conduc- 

 tivities, actual densities, maximum rates of hydrogen absorp- 

 tion and desorption, and chemical properties of the hydrides 



of magnesium-nickel, iron-titanium and raischmetal-pentaaickel. 

 Containment tube materials should also be tested to determine 

 their cosspatability with the hydrides. 



2. An experimental heat-exchanger/hydride-container be designed 

 and built to demonstrate the principles and to define the 

 prcMviES of a metal-hydride/hydrogen-storage system. 



3. A prototype model be built for the application deemed most 

 useful end capable of success in operation. The applications 

 to be considered are hydrogen and heat storage for Ssnguice 

 systems, underwater facilities, remote stations, and transporta- 

 tion vehicles. 



Hydrogen is a universal fuel for all applications including heating, 

 cooling, transportation, and electric-power generation. Metal hydrides 

 presently look like the best possible hydrogen storage method but the 

 systems need further development. 



39 



