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Unformatted text preview: assume that there is no conduction from the grass to the dew or from the ground to the grass. Take the emissivity as unity for the water. (ANSWERS: 280.8 K) 3. It is not uncommon for the night sky temperature in desert regions to drop to -40ºC. If the ambient air temperature is 20ºC and the convection coefficient for still air condition is approximately 5 W/m 2 K, can a shallow pan of water freeze? The emissivity of water at 300 K is 0.96. (ANSWER: 268.5K) 4. Show that the view factor of the inclined parallel plates of equal width, w , and a common edge with angle α is ) 2 / sin( 1 12 − = F 1 w 2 w 5. Find F 12 and F 21 for the sphere lying on infinite plane. (ANSWER: 0.5 and 0) A 1 A 2...
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This note was uploaded on 07/30/2011 for the course ME 324 taught by Professor Nezihtopaloglu during the Spring '11 term at Yeditepe Üniversitesi.
- Spring '11
- Heat Transfer