Calculate the Biot Number to determine if the Lumped Parameter Analysis can be used. If the Biot Number is greater than 0.10, use the Temperature-Time charts in Appendix F to calculate an answer and compare the result to the answer based on lumped capacitance. appendix F in this textbook https://drive.google.com/file/d/145Cbs8i465qUq9JhBFhia58fnPkuhU3k/view?usp=sharing A few apples are put into a freezer at -15°C to cool then quickly for guests who are about toarrive. Initially, the apples are at a uniform temperature of 20°C, and the convective heattransfer coefficient is h = 8 W/m².K. Consider the apples as 9.0 cm diameter spheres, and eachapple has a density of p = 840 kg/m², heat capacity of Cp = 3.81 kJ/kg:K, and thermalconductivity of k = 0.418 W/m· K. Determine the center and surface temperatures of theapples after 1 hour.

Given: Initial temperature of apples (To)= 20 oC Temperature of freezer (T∞) = -15 oC Convective…

Answered: A few apples are put into a freezer at…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Calculate the Biot Number to determine if the Lumped Parameter Analysis can be used. If the Biot Number is greater than 0.10, use the Temperature-Time charts in Appendix F to calculate an answer and compare the result to the answer based on lumped capacitance.

appendix F in this textbook https://drive.google.com/file/d/145Cbs8i465qUq9JhBFhia58fnPkuhU3k/view?usp=sharing

A few apples are put into a freezer at -15°C to cool then quickly for guests who are about to
arrive. Initially, the apples are at a uniform temperature of 20°C, and the convective heat
transfer coefficient is h = 8 W/m².K. Consider the apples as 9.0 cm diameter spheres, and each
apple has a density of p = 840 kg/m², heat capacity of Cp = 3.81 kJ/kg:K, and thermal
conductivity of k = 0.418 W/m· K. Determine the center and surface temperatures of the
apples after 1 hour.

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