Classification of Steam

Classification of Steam Points : Classification of Steam, Wet steam, Dry saturated steam, Superheated steam Steam may be classified a wet steam, dry saturated steam & super heated steam. 1. Wet steam When the steam contains moisture or particles of water in suspension, it is aid to be wet steam. It means that the evaporation of water is not complete, and the whole of the latent heat has not been absorbed. 2. Dry saturated steam When the wet steam is further heated, and it does not contain any suspended particles of water, it is known as dry saturated steam. The dry saturated steam has absorbed its full latent heat and behaves practically in the someway as a perfect gas. 3. Superheated steam When the dray steam is further heated at a constant pressure, thus raising its temperature, it is said to superheated steam. Since the pressure is constant, therefore the volume of superheated steam increases. It may be noted that one Kg of superheated steam is considerably greater than the volume of one Kg of dry saturated steam at the same pressure. In actual fraction the superheated steam is produced in a separate apparatus known is superheated, so that it is out of contact with water from which it was formed.