In a fuel fired boiler, chemical energy in the fuel is converted into heat in the furnace and the function of the boiler is to transfer this heat to the water in the most efficient manner
This heat is transfer to the water in the boiler by radiation, conduction and convention
-When heat is added to water, its temperature rises at a rate of 0.56°C (1°F) for each heat input of 2.095 kJ/kg (1 Btu/lb)
-If we take water at 0°C (32°F) and we add 419 kJ/kg (180 Btu/lb) then we will increase the temperature of the water by 100°C (180°F)
-This rise in temperature can be detected and is called Sensible Heat (Specific Enthalpy -Water)
Steam Uses:
Space heating
Drying -paper mill
Process heating
Sterilization
Shipping
Power generation
Steam Quality
Steam quality relates to the quantity of moisture present in the steam
100% quality specifying no moisture content
0% quality specifying all liquid
Liquid droplets entrained in the steam leaving a boiler contain dissolved solids
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