On a hot day, the freezers in a particular ice cream shop maintain an average temperature of Tc = -11° C while the temperature of the surroundings is Th = 25° C. Calculate the maximum coefficient of performance COP for the freezers. Which of the options below would be more effective in increasing the coefficient of performance? If the power input to the freezer is P = 3.8 kW and the freezer actually removes Qc = 12.3 × 103 J from the ice cream each second, what is the real coefficient of performance?
On a hot day, the freezers in a particular ice cream shop maintain an average temperature of Tc = -11° C while the temperature of the surroundings is Th = 25° C.
Calculate the maximum coefficient of performance COP for the freezers.
Which of the options below would be more effective in increasing the coefficient of performance?
If the power input to the freezer is P = 3.8 kW and the freezer actually removes Qc = 12.3 × 103 J from the ice cream each second, what is the real coefficient of performance?
An employee puts m = 2.1 kg of melted ice cream at T0 = 3.5° C into the freezer. Assuming that the ice cream freezes at T1 = -1.0° C, how long in seconds will it take for the ice cream to reach its freezing temperature? Take the specific heat capacity of the melted ice cream as c = 4,000.0 J/(kg⋅K).
Assuming a latent heat of fusion of Lf = 280 kJ/kg, how long, Δt2, in seconds does it take to freeze the ice cream?
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