1.0 A mass of ice at -7 °C is needed to cool 224 kg of vegetables (Cp = 3.35 KJ kg.K )ir a bunker for 24 hours . The initial temperature of the vegetables is assumed to be 29 °C . It is also assumed that the average temperature in the bunker is 7°C within the 24 hour period . If the heat gained per hour in the bunker is 25% of the heat removed to the vegetables from 29 °C to 7°C, what would be the required mass of ice ?

1.0 A mass of ice at -7 °C is needed to cool 224 kg of vegetables (Cp = 3.35 KJ kg.K )ir a bunker for 24 hours . The initial temperature of the vegetables is assumed to be 29 °C . It is also assumed that the average temperature in the bunker is 7°C within the 24 hour period . If the heat gained per hour in the bunker is 25% of the heat removed to the vegetables from 29 °C to 7°C, what would be the required mass of ice ?

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter1: Heat, Temperature, And Pressure

Section: Chapter Questions

Problem 6RQ: One British thermal unit will raise the temperature of _____ 1b of water _____F.

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

1.0 A mass of ice at -7 °C is needed to cool 224 kg of vegetables (Cp = 3.35 KJ /kg.K )in
a bunker for 24 hours . The initial temperature of the vegetables is assumed to be 29
°C . It is also assumed that the average temperature in the bunker is 7°C within the 24 -
hour period . If the heat gained per hour in the bunker is 25% of the heat removed to the
vegetables from 29 °C to 7°C, what would be the required mass of ice ?

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