Dry saturated steam Vs wet or super heated steam

In steam-using industries, two commonly referred to types of steam are dry steam (also called

Saturated steam) and wet steam.

Dry steam applies to steam when all its water molecules remain in the gaseous state. It's a transparent gas.

Wet steam applies to steam when a portion of its water molecules have given up their energy (latent heat) and condense to form tiny water droplets. Take the example of kettle boiling water. Water is first heated using an element.
As water absorbs more and more heat from the element, its molecules become more agitated and it starts to boil. Once enough energy is absorbed, part of the water vaporizes, which can represent an increase as much as 1600X in molecular volume.

In a boiler, energy from the fuel is transferred to liquid water in order to create steam. At first, cold water gets warmer and receives energy in the form of “sensible heat”, right until the boiling point.

If water is heated beyond the boiling point, it vaporizes into steam, or water in the gaseous state. However, not all steam is the same. The properties of steam vary greatly depending on the pressure and temperature to which it is subject. Steam is then called saturated steam.

Advantages of saturated steam

• Improved product quality and productivity
• Temperature can be quickly and precisely established
• Smaller required heat transfer surface area, enabling reduced initial equipment outlay
• Safe, clean, and low-cost

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Dry saturated steam Vs wet or super heated steam