Cold salt brine at -2°C is used in a packing plant to chill food slabs from 40°C to 3.4°C in 18 hours. Determine the mass of brine required to cool 100 food slabs of 225 kg each if the final temperature of the brine is 1.7°C.

Cold salt brine at -2°C is used in a packing plant to chill food slabs from 40°C to 3.4°C in 18 hours. Determine the mass of brine required to cool 100 food slabs of 225 kg each if the final temperature of the brine is 1.7°C.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.3P

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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

Problem 2
Cold salt brine at -2°C is used in a packing plant to chill food slabs from 40°C to 3.4°C in 18 hours.
Determine the mass of brine required to cool 100 food slabs of 225 kg each if the final temperature of
the brine is 1.7°C. Given:
Specific gravity of brine = 1.05
Specific heat of brine =. 3.77 kJ/kg.K
Specific heat of food slabs = 3.15 kJ/kg.K

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