Question

11. A 100 BHP diesel engine has a brake thermal efficiency of 30% and jacket water loss of 34%. The engine is to be cooled by means of a cooling tower having a range of 27oC. Find the mass of water leaving the tower.

Answer 1

$Q_{Out} = \eta \times Q_{in}=0.3\times 74 .57 = 22.37 kW$

 mass of water leaving the tower.

$Q_{out}= m\times C_p\times \triangle T$

$m = \frac{22370}{1\times300}=74.56kg$