Number 4A food product wants to be produced in a small round shape (pellet) by freezing it in a water blast freezer freezer. Airfreezer operates at a temperature of -35 ° C. The initial product temperature is 25 ° C. The pellet has a diameter of1.2 cm, and a density of 980 kg / m³. The initial freezing temperature is -2.5 ° C. The latent heat of freezing of theproduct is 280 kJ / kg. The thermal conductivity of the frozen product is 1.9 W / (m ° C). The convective heattransfer coefficient is 50 W / (m² K). Calculate the freeze time. identify :a. tf = Answer in hour

Given: A food product wants to be produced in a small round shape. The initial freezing temperature…

A food product wants to be produced in a small round shape (pellet) by freezing it in a water blast freezer freezer. Air freezer operates at a temperature of -35 C. The initial product temperature is 25 ° C. The pellet has a diameter of 1.2 cm, and a density of 980 kg / m3. The initial freezing temperature is -2.5 ° C. The latent heat of freezing of the product is 280 kJ/ kg. The thermal conductivity of the frozen product is 1.9 W/ (m° C). The convective heat transfer coefficient is 50 W / (m2 K). Calculate the freeze time. identify : a. tf = Answer in hour

A food product wants to be produced in a small round shape (pellet) by freezing it in a water blast freezer freezer. Air freezer operates at a temperature of -35 C. The initial product temperature is 25 ° C. The pellet has a diameter of 1.2 cm, and a density of 980 kg / m3. The initial freezing temperature is -2.5 ° C. The latent heat of freezing of the product is 280 kJ/ kg. The thermal conductivity of the frozen product is 1.9 W/ (m° C). The convective heat transfer coefficient is 50 W / (m2 K). Calculate the freeze time. identify : a. tf = Answer in hour

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A food product wants to be produced in a small round shape (pellet) by freezing it in a water blast freezer freezer. Air freezer operates at -25 ° C. The initial product temperature is 25 ° C. The pellet has a diameter of 0.5 cm, and a density of 980 kg / m3. The initial freezing temperature is -2.5 ° C. The latent heat of freezing of the product is 280 kJ / kg. The thermal conductivity of the frozen product is 1.9 W / (m ° C). The convective heat transfer coefficient is 50 W / (m? K). Calculate the freeze time.