A piece of electrical equipment is cooled by a labyrinth (Figure 17.6) of 1.0-cm ID water tubes

Question:

A piece of electrical equipment is cooled by a labyrinth (Figure 17.6) of 1.0-cm ID water tubes made of 15 straight sections, each 0.6 m long joined at the ends by 90° connectors and 0.1-m straight bridging pieces. The cooling water enters the labyrinth from a large header and discharges to another large header such that the velocity at both ends is negligible. If the water velocity in the tubes is 0.8 m/s, determine the pressure drop and heat removal capacity of the labyrinth with 30°C water temperature rise.

Figure 17.6