EGN3433 Simulink Exercise; Modeling and Analysis of Engineering Systems
(1) The clothes iron described in class has a sole plate weighing 1.75 kg with an exposed
area of 0.05 m2
. The sole plate is made of steel, which has a heat capacity of 450 J/kg∙oC,
and the heat transfer coefficient for convection from the iron to the surrounding air
(which is at 25 oC) is 20 J/s∙m2
∙
oC. The iron is rated at 150 W and is initially at the
temperature of the air.
(a) Use SIMULINK to a plot of temperature of the iron versus time. Go out to 5000
seconds in time. Submit the block diagram and the scope.
(b) Using the plot, estimate the steady state temperature of the iron and the time needed
for the iron to reach 100 oC. Compare these to the values obtained analytically in
class.
DETAILED ASSIGNMENT
