Formation of steam : Changing of state ( liquid to gaseous )
How to generate Steam :
steam that
occurs when the liquid and gaseous phases of water exist simultaneously at a
given temperature and pressure. In simpler terms, the steam is in equilibrium
with the heated water. During the saturated condition, the rate at which water
is vaporized is equal to the rate at which it is condensed.
When heat
is applied to water, its temperature continues to rise until it reaches its
boiling point at that pressure. As further heat is added, the water vaporizes
and converts to steam. The steam that exists at the same temperature as the
water from which it is formed is known as saturated steam. In other words,
saturated steam exists at approximately 100°C (212°F) at atmospheric pressure.
Formation Process Chart :
Formation Start from point
1> A to B
Point A consider Ice temp approximate -15 degree, when heat
added to ice and it temp increase -15 degree to 0 degree at a particular of
time but still Ice not melt because of
its freezing point of ICE . Heat apply during this process is A-B is called sensible heat of ice .
Sensible Heat : when heat apply only temp increasing
and decreasing but no changing in face is called sensible of heat .
2 > B to C
After point B if more
heat apply to ice it start melting
at constant temp. till whole ice melted and convert into water . This heat is called latent heat of fusion of ice .
Latent Heat :
During heat apply temp remain constant
at a particular of time and there is change of face is called Latent Heat .
Heat Apply A to B & B to C is called total heat of Water .
3> C to D
Further addition of heat at point C , it increase the temp
of water 0 to 100 º C know as the
boiling temp of water . This process C –
D is know as sensible heat of water .
3> D to E’ and E’ to E
& E to F
Further heat apply beyond point D , heat utilized for water
of vaporization and state changing liquid to vapour without change in temp or
constant temp. The amount of heat added during this process is called latent
heat of vaporization . The wet
steam contain some water particles in suspended foam , it represented E’ in TH
diagram or heat apply beyond the point E’ carries sufficient amount of heat
energy to convert all the water in gaseous state is know as dry saturated steam , it
represented point E in TH diagram . Now superheated steam obtained by heating
dry saturated steam at constant pressure , it represented by E-F and amount of
heat apply during is process is called heat of superheat.
This is the total process of formation of steam ( Ice to Superheated steam )
Also watch on you tube
https://youtu.be/bmwCRC9V3co
