The engine that is powered by liquid nitrogen that is stored in a tank is known as liquid nitrogen tank. Traditionally, the heat exchanger that is inside the tank heats the liquid nitrogen helps to operate the liquid nitrogen tank. Liquid nitrogen tanks are not used commercially. The pressurized gas that is formed helps the rotator motor to work. The force produced by liquid nitrogen can also be used in hybrid systems like fuel tanks to recharge the batteries, electric force etc. This type of system is also known as cross liquid nitrogen-electric force. In combination with this system, regenerative brakes can also be added.