An electric windshield defroster is used to remove 0.25-in
Chapter 7, Problem 58P(choose chapter or problem)
Problem 58P
An electric windshield defroster is used to remove 0.25-in of ice from a windshield. The properties of the ice are Tsat = 32°F, uif = hif =144 Btu/lbm, and v =0.01602 ft3/lbm. Determine the electrical energy required per square foot of windshield surface area to melt this ice and remove it as liquid water at 32°F. What is the minimum temperature at which the defroster may be operated? Assume that no heat is transferred from the defroster or ice to the surroundings.
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