Exercise 7 3-34 The wall of a refrigerator is constructed of fiberglass insulation (k=0.035 W/m K) sandwiched between two layers of 1-mm-thick sheet metal (k = 15.1 W/m-K). The refrigerated space is maintained at 2°C, and the average heat transfer coef- ficients at the inner and outer surfaces of the wall are 4 W/m²-K and 9 W/m²K, respectively. The kitchen temperature aver- ages 24°C. It is observed that condensation occurs on the outer surfaces of the refrigerator when the temperature of the outer surface drops to 20°C. Determine the minimum thickness of fiberglass insulation that needs to be used in the wall order to avoid condensation on the outer surfaces. Kitchen air 24°C 1 mm Sheet metal Insulation Refrigerated space 2°C mm
Exercise 7 3-34 The wall of a refrigerator is constructed of fiberglass insulation (k=0.035 W/m K) sandwiched between two layers of 1-mm-thick sheet metal (k = 15.1 W/m-K). The refrigerated space is maintained at 2°C, and the average heat transfer coef- ficients at the inner and outer surfaces of the wall are 4 W/m²-K and 9 W/m²K, respectively. The kitchen temperature aver- ages 24°C. It is observed that condensation occurs on the outer surfaces of the refrigerator when the temperature of the outer surface drops to 20°C. Determine the minimum thickness of fiberglass insulation that needs to be used in the wall order to avoid condensation on the outer surfaces. Kitchen air 24°C 1 mm Sheet metal Insulation Refrigerated space 2°C mm
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.
Chapter7: Forced Convection Inside Tubes And Ducts
Section: Chapter Questions
Problem 7.17P: Determine the rate of heat transfer per meter length to a light oil flowing through a 2.5-cm-ID,...
Related questions
Question
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
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.Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi…
Mechanical Engineering
ISBN:
9781305387102
Author:
Kreith, Frank; Manglik, Raj M.
Publisher:
Cengage Learning
Principles of Heat Transfer (Activate Learning wi…
Mechanical Engineering
ISBN:
9781305387102
Author:
Kreith, Frank; Manglik, Raj M.
Publisher:
Cengage Learning