Basic Marine Refrigeration System

This course covers the theory of refrigeration and teaches you how to repair troubleshoot and commission these systems.

Basic marine refrigeration system.

The ammonia gas condenses into ammonia liquid dark blue at high pressure. The compressor is the mechanical heart of a refrigeration system. The term tons of refrigeration is also used to refer to the cooling load on a room or building. It causes refrigerant to flow and is where energy is applied to perform the work of removing heat in the evaporator.

In reefer ships the temperature of the perishable or temperature sensitive cargo such as food chemical or liquefied gas is controlled by the refrigeration plant of the ship. The compressor compresses the ammonia gas. Drop in units that run on 12 volts and look like something you d find in a house or an rv. For an air conditioning system to operate with economy the refrigerant must be used repeatedly.

Liquids absorb heat when changed from liquid to gas. Cold plates that are installed in an existing refrigerator or ice box and run on 12 volts. Refrigerant is a substance that acts as a cooling agent by absorbing and giving off heat. One ton of refrigeration is the amount of latent heat absorbed when one ton of ice at 32 f melts to water at 32 f during 24 hours.

There are three basic types of marine refrigeration systems. Isotherm marine refrigeration by indel webasto marine features marine refrigerators and freezers for boats yachts and sail including built in and travel boxes wine cellars water heaters safes as well as customized solutions for more comfort on board. Namely the vapor. Isotherm compact marine refrigeration systems are designed to provide reliable cooling and low power consumption for ice box conversion from 2 to 21 cubic feet.

For this reason all air conditioners use the same cycle of compression condensation. The coils on the back of the refrigerator let the hot ammonia gas dissipate its heat. The compressed gas heats up as it is pressurized orange. Usually there are two types of refrigeration systems commonly encountered.

A marine refrigeration course for engineers working on superyachts merchant navy vessels oil and gas platforms jackups semi subs ferries and cruiseships. Basic refrigeration system fundamentals the compression cycle. Latent heat is explained later in this article one ton of refrigeration equals 12 000 btu per hour btuh. The objective of any refrigeration system is to collect heat from a low temperature area and move it to a high temperature area.

The compressor serves two functions. Gases give off heat when changed from gas to liquid. The high pressure ammonia liquid flows through the expansion valve you can think of the expansion valve as a small hole.