Answered: Fruit is impeded from ripening when it…

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

See similar textbooks

Related questions

Question

Fruit is impeded from ripening when it reaches high temperatures (>32°C). Farmer Joe is
worried that Deleware's summer heat wave will affect the ripening of his ground cherries.
The spherical fruit (1 cm in diameter) is surrounded by a spherical papery husk (λhusk = 0.3
W/m K) with an inner diameter of 2 cm and an outer diameter of 2.1 cm. The air in between
the fruit and the husk is stagnant (λair = 0.03 W/m K). On a calm day in July, the deleware
air (outside of the husk) is very warm, with a temperature of ~38°C and a heat transfer
coefficient of h _{deleware,calm} = 10 W/m ²K.

(a) Sketch the system, labeling all temperatures, dimensions, and proportionality constants.

(b) sketch the electrical analogy tothis system, labeling all temperatures, resistances, and heat flows

Expert Solution

Step 1: Given

The thermal conductivity of of husk is $k subscript 1 equals 0.3 space W divided by m K$

The radius of fruit is $r subscript 1 equals 1 half space c m equals 0.005 space m$ .

The inner radius of husk is $r subscript 2 equals 2 over 2 space c m equals 0.01 space m$ .

The outer radius of husk is $r subscript 3 equals fraction numerator 2.1 over denominator 2 end fraction space c m equals 0.0105 space m$ .

The thermal conductivity of air between fruit and husk is $k subscript 2 equals 0.03 space W divided by m K$ .

The conductive heat transfer coefficient is $h equals 10 W divided by m squared K$

The outside temperature is $T subscript o equals 38 degree C$

Step by step

Solved in 4 steps with 16 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions