A food product to be produced in the form of a small round (pellet) by the way frozen in the freezer air blast freezer. Air freezer operates at a temperature of -30 °C. Temperature the initial product is 25 °C. Pellet has a diameter of 1.2 cm, and the density of 980 kg/m³. Temperature frozen beginning is -2.5 °C. Latent heat of freezing of products is 280 kJ/kg. Conductivity thermal frozen products is 1.9 W/(m °C) Coefficient of convective heat transfer is 50 W/(m² K) Calculate the freezing time a. tf =.... h
A food product to be produced in the form of a small round (pellet) by the way frozen in the freezer air blast freezer. Air freezer operates at a temperature of -30 °C. Temperature the initial product is 25 °C. Pellet has a diameter of 1.2 cm, and the density of 980 kg/m³. Temperature frozen beginning is -2.5 °C. Latent heat of freezing of products is 280 kJ/kg. Conductivity thermal frozen products is 1.9 W/(m °C) Coefficient of convective heat transfer is 50 W/(m² K) Calculate the freezing time a. tf =.... h
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.
Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.52P
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A food product to be produced in the form of a small round (pellet) by the way frozen in the freezer air blast freezer. Air freezer operates at a temperature of -30 °C. Temperature the initial product is 25 °C. Pellet has a diameter of 1.2 cm, and the density of 980 kg/m³. Temperature frozen beginning is -2.5 °C. Latent heat of freezing of products is 280 kJ/kg. Conductivity thermal frozen products is 1.9 W/(m °C) Coefficient of convective heat transfer is 50 W/(m² K) Calculate the freezing time
a. tf =.... h
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