Liquid Air – Just Another Energy Storage

Liquid air is more of an alternative energy storage than an alternative fuel source.

In liquid air technology, air is cooled into cryogenic temperatures to transform it into liquid state, stored in a cryogenic tank for transport and use in liquid air cycle engines.

Table 1 - Energy Storage Capacity Comparison
Technology Energy Storage Capacity
Watt-hours/kg
Remarks
Gasoline 3000 Base Case
Lithium-Ion Battery 100 - 250 3.3% - 8.3%
Liquid Air 97 3.2%

Source: http://en.wikipedia.org/wiki/Liquid_nitrogen_vehicle
Note: As air is almost 80% nitrogen, liquid nitrogen was used as the basis in this comparison.

From table 1, it could easily be assessed that liquid air energy storage is lower than the lower value of lithium-ion storage battery. For this technology to fly, it should surpass existing technologies.

About the Author

Ver Pangonilo
A Filipino Engineer, Registered Professional Engineer of Queensland (RPEQ) - Australia and Professional Electrical Engineer (PEE) - Philippines with extensive experience in concept select, front-end engineering, HV & LV detail design, construction and commissioning of Hazardous and Non-Hazardous Area electrical installations in water and waste water pipeline and pumping facilities, offshore platforms, hydrocarbon process plants and pipelines including related facilities. Hazardous area classification and design certification (UEENEEM015B, UEENEEM016B, UEENEEM017B).
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