4. A car engine with the dimensions 0.6 m high, 0.50 m-wide, and 0.8-m- long. The bottom surface of the engine block is at a temperature of 80°C and has an emissivity of 0.95. The ambient air is at 20°C, and the road surface is at 25°C. Determine the rate of heat transfer from the bottom surface of the engine block by convection and radiation as the car travels at a velocity of 80 km/h. Assume the flow to be turbulent over the entire surface. k = 0.02735 W/m.°C L= 0.8 m v =1.798×10$ m²/s Engine block Pr = 0.7228 Air T; = 80°C ɛ = 0.95 V½ = 80 km/h T = 20°C
4. A car engine with the dimensions 0.6 m high, 0.50 m-wide, and 0.8-m- long. The bottom surface of the engine block is at a temperature of 80°C and has an emissivity of 0.95. The ambient air is at 20°C, and the road surface is at 25°C. Determine the rate of heat transfer from the bottom surface of the engine block by convection and radiation as the car travels at a velocity of 80 km/h. Assume the flow to be turbulent over the entire surface. k = 0.02735 W/m.°C L= 0.8 m v =1.798×10$ m²/s Engine block Pr = 0.7228 Air T; = 80°C ɛ = 0.95 V½ = 80 km/h T = 20°C
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.
Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.31P: A spherical communications satellite, 2 m in diameter, is placed in orbit around the earth. The...
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