heat exchanger, cooler, heater, barnacles, plates, tubes, scales, marine growth, temperature controller, ship, temperature, controls

Heat Exchanger

Home Registrar Newsletter Courses E-book References Shopping Seafaring About
Marine Links Glossary Skills Calculation Tools Ship

heat exchanger, cooler, heater, barnacles, plates, tubes, scales, marine growth, temperature controller, ship, temperature, controls


Heater tube nest for heating fuel oil


Shell and tube cooler on the left


Plate heat exchanger fluid flow


Boiler tubes used for producing steam

Main Diesel Engine Cooling System

Heat Exchangers

Heat exchangers is a term used for transferring heat from one medium to another. Seawater is used to cool another medium. The other medium may be fresh water, for engine cooling or oil for engine lubrication. Steam is used to heat up fuel oils.

For a tubular heat exchanger, seawater is passed through tubes internally, while fresh water or oil is led through the tubes externally. The heat from the fresh water or oil is conducted through the walls of the tubes to the seawater and is discharged overboard. 

In winter months, it is usual to re-circulate back some of the seawater instead of discharging it. This ensures a better control on the temperatures in the systems.

Other designs make use of plates instead of tubes, but the principle of the heat exchanger remains the same.

Despite the use of seawater strainers, after a period of use, the tubes or plates tend to choke up with barnacles, scales and other marine growth. Periodic cleaning of the tubes is necessary to improve on the cooling effect.

The purpose of the heat exchangers is to cool. However, the sea waters temperature changes in different climatic regions and the engine load can also change. The heat exchangers have to work together with temperature controllers in order to be effective.

There is another type of heat exchanger - the electrical tankless heater. Mostly found in homes, they may be used in the galleys for hot water. They are very economical and saves energy.

  Training Job Leisure Skills Engrg Articles Places Links Ships  
Home Registrar Newsletter Courses E-book Articles References Shopping Seafaring About Us
Pleasure Sensations Advertise with Us E-book Design Web Design Survival Soviet Orient Travel Aids Seascape Cartoons
Marine Treasure Chest Navy Forex Trading Contact Us Link to Us Boating Safety Posters Story Telling Products
Search Flag Digital Fun 2002 - 2011 Thomas Yoon   Safety A-ware Offshore Surveys Search Colleges