Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3/min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately
A pipe of diameter 10 cm is maintained at 170°C and exposed to air at 30°C. The length of the pipe is 2 m and it is kept horizontal. Find out the heat lost by the pipe per hour.
Air at temperature 523 K flows over a flat plate 0.3 m wide and 1m long at velocity of 8 m/s, if the plate is maintained at 351 K, The average convective heat transfer coefficient is 3.06W/m2K. The rate of heat flow from both sides of the plate is,