👉 Extras fluid, also known as non-condensable gases or residual gases, refers to gases that remain trapped within a closed system after normal vaporization and condensation processes have occurred. These gases, such as helium, neon, and hydrogen, do not escape easily due to their low molecular weight and high diffusivity. Unlike condensed phases (liquid and vapor), extras fluid cannot be fully removed by simply reducing pressure, as they remain in the system in small quantities. This phenomenon is significant in various industrial applications, including refrigeration cycles and gas storage, where understanding and managing these trapped gases is crucial for efficiency and safety.
