Design and Analysis of Heat Exchange of Subsea Cooling System for Ship Protector Motor

The purpose of this research is to design an underwater cooling system to cool the Diesel motor, determine the performance of the Diesel motor and calculate the rate of heat exchange. This study uses an experimental method. The location for obtaining data related to the problems in this paper is located at the location of the fishermen at Lampu Satu beach, Samkakai District, Merauke Regency. The amount of heat transfer that occurs in the modified cooling system is larger, which is in the range of  for stationary ships and  for road ships, when compared to the original heat exchanger which is only  for stationary ship and  for moving ship. The occurrence of heat transfer in large quantities in the modified heat exchanger because it is also influenced by the speed of the ship, so that heat can move quickly in large quantities to the open sea. The modifications made have no effect on engine performance, because from the results of calculating engine performance as a comparison to determine engine performance, it can be seen that the calculated quantities are the same value, there is only a difference in the amount of heat lost due to other losses, namely  for the original heat exchanger, while the modified heat exchanger is .