Is cryogenic liquid air a clean fuel?

Clean fuel Recalling the fossil fuel analogy, cryogenic liquid air can be regarded as a kind of clean fuel. Renewable energies or other energy sources are stored in the form of clean fuel (i.e., cryogenic energy) through the air liquefaction process.

How does a cryogenic tank work?

The working air is deeply cooled down through the cryo-turbines or throttling valves, the liquid air is finally produced and stored in a liquid air tank. The cryogenic tank is designed with vacuum insulation similar to the normal liquid nitrogen tank.

How to recover cryogenic energy stored in liquid air/nitrogen?

To recover the cryogenic energy stored in the liquid air/nitrogen more effectively, Ahmad et al. [102, 103] investigated various expansion cycles for electricity and cooling supply to commercial buildings. As a result, a cascade Rankine cycle was suggested, and the recovery efficiency can be higher than 50 %.

Can a liquid air energy storage system overcome a major limitation?

Korean scientists have designed a liquid air energy storage (LAES) technology that reportedly overcomes the major limitation of LAES systems - their relatively low round-trip efficiency.

Is liquid air energy storage a promising thermo-mechanical storage solution?

6. Conclusions and outlook Given the high energy density, layout flexibility and absence of geographical constraints, liquid air energy storage (LAES) is a very promising thermo-mechanical storage solution, currently on the verge of industrial deployment.

Can liquids be used for cryogenic applications?

Apart from safety and cost considerations, a key obstacle in leveraging liquids for cryogenic applications lies in their limited temperature range in the liquid state, spanning from the temperature of liquid air (∼80 K, 1 atm) to ambient temperature (∼293 K, 1 atm).