Liquid Air Powered Ships

I had previously proposed ideas to use liquid air as a clean energy source alternative to some battery and hydrogen systems. I also had proposed ways to generate liquid air directly from the wind turbines.

Liquid air can be used as a direct propulsion for ships as well. Especially short-range ones. Liquid air at room temperature expends up to 700 times its liquid volume. This expansion can be used to propel a ship at sea. There is no need to use propellers. Jet stream of air would propel the ship silently. The lack of propellent noise is also environment friendly for the sea life. High thrust levels can also be achieved. The range would be limited but it would still beat the battery powered alternatives. Additionally, as the liquid air is consumed, the ship would get lighter. This is not the case with batteries. This design also allows high efficiency side thrusters for fast maneuvering.

This technology can be ideal applied to autonomous supply ships for islands. They would be refiled using the offshore wind farm. It would reduce the cost of supplying islands and produce no air, sea or noise pollution to the environment. Most importantly, it would require almost no exported raw materials to implement it.