Unformatted text preview: = 888 kg/m 3 , k = 0.145 W/mºC, p c = 1880 J/kgºC and = 0.0009 m 2 /s. 4. Water at 20ºC enters a 1cmdiameter tube at a velocity of 2 m/s. The tube wall temperature is constant at 50ºC and the tube is 3.0 m long. Calculate the exit water temperature. Use the following properties of water: = 997 kg/m 3 , k = 0.61 W/mºC, p c = 4180 J/kgºC and = 0.00086 Ns/m 2 . 5. Air at 300 K and 50 kPa flows over the upper side of a 1msquare plate. The upper plate is maintained at a constant temperature of 400 K. (1) If air flows at a velocity of 50 m/s, calculate the heat lost by the upper plate. (2) If air flows at a velocity of 1 m/s, calculate the heat lost by the upper plate. (3) If no air flows over the horizontal plate, calculate the heat lost by the upper plate. (4) If the emissivity of the upper plate is 0.2 and the temperature of the surroundings is 300 K, what will be the heat loss of the upper plate by radiation?...
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 Spring '11
 koraykadirsafak
 Thermodynamics, Heat, Heat Transfer, upper plate, tube wall temperature

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