Chapter 10 Boiling and Condensation10-31Cold water enters a steam generator at 20°C and is boiled, and leaves as saturated vapor at boiler pressure. The boiler pressure at which the amount of heat needed to preheat the water to saturation temperature is equal to the heat of vaporization is to be determined.Assumptions1 Steady operating conditions exist. 2 Heat losses from the steam generator are negligible. PropertiesThe properties needed to solve this problem are the heat of vaporization hfgand the specific heat of water Cpat specified temperatures, and they can be obtained from Table A-9. Water, 100°CSteam generator Water, 20°CSteam 100°CAnalysisThe heat of vaporization of water represents the amount of heat needed to vaporize a unit mass of liquid at a specified temperature, and represents the amount of heat needed to preheat a unit mass of water
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This note was uploaded on 01/24/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.