2011年9月22日星期四

Automobiles Have Been Designed Which Operate On Liquid Hydrogen

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The solution apt the hydrogen cache problem, in automobiles at fewest, may well be interstitial metalline hydrides (Sit%9).Hydrogen, creature a small molecule, may be preoccupied into the cavities in the crystal lattice (111 $J )of metals in much the same direction for a absorb absorbs water. By accommodating the temperature and/or pressure of the metal hydride, the preoccupied hydrogen may be readily unloaded by a appropriate combustion rate to oil one engine.

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The thermal insulation is provided by twenty-five wafers of aluminum foil separated at cup fabric and twenty-five wafers of aluminized mylar.The multilayer insulations is evacuated and contains permeable. The use of liquid hydrogen as a fuel for larger turbine engines which operate aeroplane and navy containers has likewise been intended. (64)While some experimental hydrogen powered aircraft have made it from the painting embark to the airways, sparing and technical difficulties have prevented numerous designs from approaching practical evolution.lt may in truth rotate out, as some experts have suggested, that the use of liquid hydrogen, particularly for automobile use, is simply technically unrealistic merely period will provide the response.

Automobiles have been charted which operate ashore fluid hydrogen, but these systems give ascend to seemingly inevitable problems arising from the handling of a cryogenic liquid. For example, liquid hydrogen is expensive, results in considerable fuel loss due to hydrogen evaporation and creates substantial engineering problems. In counting, the liquefaction process requires significant vigor input, up to 60% of the hydrogen' s energy content. Current research is above some of the limitations of j liquid hydrogen. One particular district of learn is directed at efficient insulation of storage tanks to reduce hydrogen losses. Generally, liquid hydrogen is cached in vacuum jacketed, multilayer isolated tanks. For example, automobiles converted to operate aboard liquid hydrogen have utilized storage tanks with an inner and outer aluminum shell.

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