In this article we will discuss about:- 1. Formation of Steam 2. Conditions of Steam 3. Properties 4. Enthalpy. Formation of Steam: Generation of One Kg of Steam at a Given Pressure from Water Initially At 0°C: Let us decide upon the pressure under which one kg of water is to be heated. After fixing the pressure we can know [...]
There are four methods of determining the dryness fraction of steam. They are as mentioned below: 1. Bucket Calorimeter: This method of determining the dryness fraction of steam is not exact. The value of dryness fraction obtained by this method is lower than the actual value. The apparatus shown in fig. 3-21 consists of a copper calorimeter which is placed [...]
Liquids are heated and evaporated at constant pressure. The vapours are also superheated at constant pressure in superheaters. For this reason the entropy of vapours can be calculated from the formula for the change of entropy at constant pressure. We consider the entropy of vapour in three phases of formation. In the following topic the entropy of steam and the [...]
In this article we will discuss about how to measure dryness fraction of steam. Barrel Calorimeter: To get the approximately dryness fraction of steam, a very simple ape called Barrel Calorimeter is used. This consists of a wooden barrel containing cold water. Steam is taken from the pipe through which it is flowing and is condensed in the cold water. [...]
In this article we will discuss about:- 1. Conditions of Steam 2. Properties of Steam 3. Steam Tables 4. Internal Energy and Entropy 5. Phase Diagram for a Pure Substance 6. The P – V and T – S Diagrams for H2O (Vapours) 7. Mollier Diagram or Total-Heat-Entropy or Enthalpy-Entropy Diagram (h-s Diagram). Contents: Conditions of Steam Properties of Steam [...]