Marine Refrigeration System Working Principle

The pressure temperature relationship is an important principle for refrigeration.

Marine refrigeration system working principle. Systems designed for the cooling of refrigerated containers employ trunkings arranged so that containers stowed in stacks between built in guide rails can be connected to the suction and delivery air ducts of the ship s refrigeration plant by bellows pieces operated. The working principle of a refrigerator and refrigeration in general is very simple. Individual containers with their own refrigeration plant are connected to the 440 or 220 a c. This principle is applied in the refrigeration system.

As pressure decreases the change of state temperature also decreases. The refrigeration plants on merchant vessels play a vital part in carrying refrigerated cargo and provisions for the crew on board. Freon gas or the refrigerant absorbs heat inside the area to be cooled in the evaporator unit and transfers that heat to the refrigerator s condenser at exterior. For example at sea level water boils at 212 f.

Refrigeration basic principle applies on all system whether it s the smallest water cooler to largest walk in freezer that ever built. When you pass a low temperature liquid close to objects that you want to cool heat from those objects is transferred to the liquid which evaporates and takes away the heat in. The compressor serves two functions. Understanding the basics is the key to properly plan the maintenance and troubleshoot the marine refrigeration system.

Basic refrigeration system fundamentals the compression cycle. At 5 000 feet water boils at 202 f. It causes refrigerant to flow and is where energy is applied to perform the work of removing heat in the evaporator. The compressor is the mechanical heart of a refrigeration system.

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. This guide describes the principle and working of marine refrigeration system along with the important components and refrigerants used. The most commonly used refrigeration machines are the household refrigerator and deep freezer though these machines are available in many other forms. The basic components of any refrigeration system working on the vapour compression cycle are the compressor condenser expansion valve evaporator and the refrigerant fluid which is alternatively vapourized and liquefied during the refrigeration cycle.