Steam table - thermodynamics, Mechanical Engineering

Steam table - Thermodynamics:

Sol.: Steam table offers various physical data regarding the properties of saturated water and steam. This table is very helpful in solving the problem on properties of steam. It should be kept in mind that the pressure in this table is absolute pressure.

In this table, the symbols used to indicate various data are as follows:
(1)  'P' indicates theabsolute pressure in bar

(2)  't' indicates saturation temperature equivalent to any given pressure. This has been denoted by 'ts'.

(3)  'vf'signify specific volume of water in m3/kg which corresponds to any given pressure.

(4)  'vg'signify specific volume of dry saturated steam which corresponds to any given pressure.

(5)  'hf'signify heat of the liquid in kJ/kg which corresponds to any given pressure.

(6)  'hfg'signify latent heat of evaporation in kJ/kg which corresponds to any given pressure.

(7)  'hg'signify enthalpy of dry saturated steam in kJ/kg which corresponds to any given pressure.

(8)  'Sf'signify entropy of water in kJ/kg.K which corresponds to any given pressure.

(9)  'Sg' signify entropy of dry saturated steam in kJ/kg.K which corresponds to any given pressure.
(10)  "Sfg" signify entropy of evaporation corresponds to any pressure. There are two types of steam tables:

One steam table is on the basis of absolute pressure of steam and the other steam table is on basis of saturation temperature. Extracts of two types of steam tables are stated below.

584_Steam table.png

Posted Date: 10/15/2012 6:40:28 AM | Location : United States







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