A one-shell pass and six-tube passes heat exchanger in a factory is used to decrease the temperature of Hot Oil(Cp=1900 J/kg. oC , Temp=200 oC flowing through tube with the help of water(Cp=4195 J/kg. oC) from nearbylake. Water initially at 16 oC leaves the heat exchanger at 90 oC by flowing at the rate of 0.3 kg/sec. Thevalues of the Ui and Uo should be 2200 W/m2 oC and 1500 W/m2 oC, respectively.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k