Arrays of parallel equally spaced vertical thin plates are connected to the surface of a natural convection air heater. The plates are maintained at a fixed temperature of 75°C by embedding electrical heaters. The plates are 305-mm high and 305-mm long. The whole set-up is in an area where the air temperature is 20°C. The total width of the array cannot exceed 150-mm. What is the plate spacing in millimeters that maximizes heat transfer from the array?

Arrays of parallel equally spaced vertical thin plates are connected to the surface of a natural convection air heater. The plates are maintained at a fixed temperature of 75°C by embedding electrical heaters. The plates are 305-mm high and 305-mm long. The whole set-up is in an area where the air temperature is 20°C. The total width of the array cannot exceed 150-mm. What is the plate spacing in millimeters that maximizes heat transfer from the array?

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.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.10P

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