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Calculate the ideal power in kW to make 1 Ton (=1000 kg) of ice at 0...

Calculate the ideal power in kW to make 1 Ton (=1000 kg) of ice at 0 deg.C per hour from water at 20 deg.C. Surroundings at 20 deg.C.   

Use the expression for Wideal to calculate the power.   

The total enthalpy change of the water = [(enthalpy change of the water cooled from 20 to 0 deg.C) + (enthalpy change of water to ice at 0 deg.C, this is the heat of fusion of water)].   

The total entropy change of the water = [(entropy change of water cooled from 20 to 0 deg.C) + (entropy change of ice at 0 deg.C = (heat of fusion of water)/(temperature of fusion of water to ice)].   

You can find enthalpy and entropy changes of the water from a steam table. Be sure to keep the signs of the terms correct. The answer is about 12 kW.   

engineering   Mechanical-Engineering   
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