Abstract
<jats:p>Various methods and systems are used on ships to remove heat from operating power plants. The main objective of designing these cooling systems is to ensure the necessary heat removal during different operating modes of the power plants. During the operation of ships, it was observed that the mechanisms and devices cooled by seawater experienced rapid wear and tear, leading to frequent repairs, especially in coastal and marine areas. This resulted in significant costs for shipowners due to the need for expensive maintenance. As a result, there was a need to reduce the harmful effects of saltwater. One solution is to install a heat exchanger in the outboard box. The purpose of its installation is to reduce the harmful corrosive effect of water on critical structures and mechanisms of the cooling system of main and auxiliary engines, as well as to reduce the harmful effect of electrochemical corrosion on critical components and mechanisms, while improving environmental safety. This is the main reason for using box coolers as a cooling system on modern ships. When producing domestic products to replace imported ones, it is necessary to consider the specific features of the ship's operation and the movement of the medium in the heat exchange space. The article discusses the features of calculating and designing ship box coolers. It proposes methods for preliminary determination of the hydraulic characteristics of a channel in which a free-flowing heat exchanger is installed. The results of calculating a ship box cooler are presented.</jats:p>