Q: Hot air is to be cooled as it is forced to flow
Hot air is to be cooled as it is forced to flow through the tubes exposed to atmospheric air. Fins are to be added in order to enhance heat transfer. Would you recommend attaching the fins inside or o...
See AnswerQ: What is the reason for the widespread use of fins on surfaces
What is the reason for the widespread use of fins on surfaces?
See AnswerQ: Consider heat transfer between two identical hot solid bodies and the air
Consider heat transfer between two identical hot solid bodies and the air surrounding them. The first solid is being cooled by a fan while the second one is allowed to cool naturally. For which solid...
See AnswerQ: What is the difference between the fin effectiveness and the fin efficiency
What is the difference between the fin effectiveness and the fin efficiency?
See AnswerQ: Oranges of 2.5-in diameter (k = 0
Oranges of 2.5-in diameter (k = 0.26 Btu/h⋅ft⋅°F and α = 1.4 × 10−6 ft2/s) initially at a uniform temperature of 78°F are to be cooled by refrigerated air at 25°F flowing at a velocity of 1 ft/s. The...
See AnswerQ: Some engineers have developed a device that provides lighting to rural areas
Some engineers have developed a device that provides lighting to rural areas with no access to grid electricity. The device is intended for indoor use. It is driven by gravity, and it works as follows...
See AnswerQ: The fins attached to a surface are determined to have an effectiveness
The fins attached to a surface are determined to have an effectiveness of 0.9. Do you think the rate of heat transfer from the surface has increased or decreased as a result of the addition of these f...
See AnswerQ: White potatoes (k=0.50 W/m⋅
White potatoes (k=0.50 W/m⋅K and α=0.13 × 10−6 m2/s) that are initially at a uniform temperature of 20°C and have an average d...
See AnswerQ: An experiment is to be conducted to determine the heat transfer coefficient
An experiment is to be conducted to determine the heat transfer coefficient on the surfaces of tomatoes that are placed in cold water at 7°C. The tomatoes (k = 0.59 W/m⋅K, α = 0.141 ×10−6 m2/s, ρ = 99...
See AnswerQ: Explain how the fins enhance heat transfer from a surface. Also
Explain how the fins enhance heat transfer from a surface. Also, explain how the addition of fins may actually decrease heat transfer from a surface.
See Answer
