Terms used related to Steam...

Terms used related to Steam The terms used related to steam are given below. Absolute pressure – It is gauge pressure plus atmospheric pressure. Atmospheric pressure – It is the normal pressure of the atmosphere on the sea level at 0 deg C. Boiling point – It is the temperature (100 deg C) at which water boils. Water boils when its absolute pressure reaches the vapour pressure. Condensation – It is defined as the change in the physical state of water vapour to liquid water. It is reverse of vaporization. Condensate – It is the liquid phase produced by the condensation of steam. Density of steam – It is the mass of steam per unit of volume of steam at the given pressure and temperature. It is the reciprocal of the specific volume. Dry saturated steam – On heating the wet steam, the water particles, which are in suspension, starts evaporating gradually and at a particular moment the final particles just evaporates. The steam at that moment is called dry steam or dry saturated steam. The resulting volume is known as specific volume of dry steam. This steam does not obey the gas laws. Dryness fraction of saturated steam – It is a measure of quality of wet steam. It is the ratio of the mass of dry steam to the mass of total wet steam. Enthalpy – Enthalpy of a system is defined as the mass of the system (m) multiplied by the specific enthalpy (h) of the system and can be expressed as H = m h, where H is enthalpy in kJ, m is mass in kg, and h is specific enthalpy in kJ/kg. Enthalpy is the total amount of heat received by 1 kg of water from O deg C at constant pressure to convert it to...