what is steam?
why is steam used?
How do we create steam?
a Btu--British thermal unit1Btu is the amount of heat energy required to raise the temperature of 1pound of water by 1F
the degree of hotness with no implication of the amount of heat energy available.
a measure of energy available with no implication of temperature .to illustrates the one Btu that raises one pound of water from 39 0 f to 40 F could come from the surrounding air at a temperature of 70 F from a flame at a temperature of 1000 F.
the heat energy required to create steam is:
is the amount of heat energy required to raise the temperature of water from 32oF to boiling point(saturated liquid)at a given pressure
-sensible heat raises the temperature of the water and can be sensed with a thermometer
is the amount of heat energy required to transform water at the boiling point (saturated liquid )to steam
-adding latent heat does not raise the temperature saturated liquid and steam have the same temperature for a given pressure remember:
the latent heat added at the boiler is what we have available to do work in our equipment but when we remove latent we create condensate