
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Transcribed Image Text:Problem #2:
A mass of ice at -4°C is needed to cool 115 kg of vegetables in a bunker for 24
hours. The initial temperature of the vegetables is assumed to be 29°C. It is also
assumed that, within the 24-hr period, the average temperature inside the
bunker is 7°C. If the heat gained per hour in the bunker is 30% of the heat
removed to cool the vegetables from 29°C to 7°C, what would be the required
mass of ice in kg?
Use:
Specific heat of water 4.2292 kJ/kg-°C
• Specific heat of ice 1.9387 kJ/kg-°C
Specific heat of vegetables 3.35 kJ/kg-°C
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