Thermodynamics HW Solutions 854

# Thermodynamics HW Solutions 854 - Chapter 10 Boiling and...

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Chapter 10 Boiling and Condensation 10-77 Water is boiled at T sat = 100 ° C by a chemically etched stainless steel electric heater whose surface temperature is maintained at T s = 115 ° C. The rate of heat transfer to the water, the rate of evaporation of water, and the maximum rate of evaporation are to be determined. Assumptions 1 Steady operating conditions exist. 2 Heat losses from the heater and the boiler are negligible. Properties The properties of water at the saturation temperature of 100 ° C are (Tables 10-1 and A-9) Water, 100 ° C 115 ° C Steam 100 ° C ρ σ l v l = = = = 957 9 060 0 0589 175 . . . . kg / m kg / m N/m Pr 3 3 h fg l pl =⋅ ° 2257 10 0 282 10 4217 3 3 J/kg kg m / s C J / k g C μ . Also, 0.0130 and n = 1.0 for the boiling of water on a chemically etched stainless steel surface (Table 10-3). Note that we expressed the properties in units specified under Eq. 10-2 in connection with their definitions in order to avoid unit manipulations.
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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.

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