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Consider a hot automotive engine, which can be ap- proximated as a 0.5-m-high, 0.40-m-wide, and 0.8-m-long rec- tangular block. The bottom surface of the block is at a temperature of 80°C and has an emissivity of 0.95. The ambi- ent 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 veloc- ity of 80 km/h. Assume the flow to be turbulent over the entire surface because of the constant agitation of the engine block.

Consider a hot automotive engine, which can be ap- proximated as a 0.5-m-high, 0.40-m-wide, and 0.8-m-long rec- tangular block. The bottom surface of the block is at a temperature of 80°C and has an emissivity of 0.95. The ambi- ent 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 veloc- ity of 80 km/h. Assume the flow to be turbulent over the entire surface because of the constant agitation of the engine block.

Elements Of Electromagnetics
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
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Consider a hot automotive engine, which can be ap- proximated as a 0.5-m-high, 0.40-m-wide, and 0.8-m-long rec- tangular block. The bottom surface of the block is at a temperature of 80°C and has an emissivity of 0.95. The ambi- ent 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 veloc- ity of 80 km/h. Assume the flow to be turbulent over the entire surface because of the constant agitation of the engine block.
Transcribed Image Text:Consider a hot automotive engine, which can be ap- proximated as a 0.5-m-high, 0.40-m-wide, and 0.8-m-long rec- tangular block. The bottom surface of the block is at a temperature of 80°C and has an emissivity of 0.95. The ambi- ent 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 veloc- ity of 80 km/h. Assume the flow to be turbulent over the entire surface because of the constant agitation of the engine block.
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