Water at 15.56oC is to be heated in a 2-mm-ID tube until the exit temperature reaches 26.67oC.

Question:

Water at 15.56oC is to be heated in a 2-mm-ID tube until the exit temperature reaches 26.67oC. The tube wall temperature is maintained at 48.99oC and the inlet flow velocity is 0.3 m/s. Calculate the length of tube required in meters to accomplish this heating. Also calculate the total heating required, expressed in watts.