A 5 cm-thick beef steak is being frozen in a -30°C room. The product has 73% moisture content, a density of 970 kg/m 3, and thermal conductivity (frozen) of 1.1 W/(m K). Estimate the freezing time using Plank’s equation. The product has an initial freezing temperature of -5°C, and the movement of air in the freezing room provides a convective heat-transfer coefficient of 5 W/(m 2 K).

A 5 cm-thick beef steak is being frozen in a -30°C room. The product has 73% moisture content, a density of 970 kg/m 3, and thermal conductivity (frozen) of 1.1 W/(m K). Estimate the freezing time using Plank’s equation. The product has an initial freezing temperature of -5°C, and the movement of air in the freezing room provides a convective heat-transfer coefficient of 5 W/(m 2 K).

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 8.13P

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