1. An electric boiler can be modeled as a large tank of water with an electric h
ID: 1863256 • Letter: 1
Question
1. An electric boiler can be modeled as a large tank of water with an electric heating element that is a thin flat plate with dimensions of 3m by 1m immersed in water at the boiler temperature. The convective coefficient on either side of the plate is 30,000 (W/m^2 x K). The boiler is operated at a pressure of 1500 kPa. What is the max amount of steam this boiler can make in kg/s if the surface temp of heating element can not exceed 500 C assuming water enters boiler as saturated liquid and leaves at saturated vapor at the boiler pressure? (Remember both sides are transferring an equal amount of heat to the water in the boiler)
a. 27.9
b. 10.1
c. 49
d. none of the above
An electric boiler can be modeled as a large tank of water with an electric heating element that is a thin flat plate with dimensions of 3m by 1m immersed in water at the boiler temperature. The convective coefficient on either side of the plate is 30,000 (W/m^2 x K). The boiler is operated at a pressure of 1500 kPa. What is the max amount of steam this boiler can make in kg/s if the surface temp of heating element can not exceed 500 C assuming water enters boiler as saturated liquid and leaves at saturated vapor at the boiler pressure? (Remember both sides are transferring an equal amount of heat to the water in the boiler) 27.9 10.1 49 none of the aboveExplanation / Answer
the correct answer is option b 10.1
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