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Refrigeration machinery space operations on board cargo ship
Safety precautions for refrigeration plant and refrigerated compartments:
Adequate information should be available on each vessel, laying
down the operation and maintenance safeguards of the refrigeration plant,
the particular properties of the refrigerant and the precautions for its safe
No one should enter a refrigerated compartment without first
informing a responsible officer.
The compartment or flat in which refrigeration machinery is fitted
should be adequately ventilated and illuminated. Where fitted, both the supply
and exhaust fans to and from compartments in which refrigeration machinery
is situated should be kept running at all times. Inlets and outlets should be
kept unobstructed. When there is any doubt as to the adequacy of the
ventilation, a portable fan or other suitable means should be used to assist in
the removal of toxic gases from the immediate vicinity of the machine.
Should it be known or suspected that the refrigerant has leaked
into any compartments, no attempt should be made to enter those
compartments until a responsible officer has been advised of the situation. If it
is necessary to enter the space, it should be ventilated to the fullest extent
practicable and the personnel entering should wear approved breathing
apparatus. A person should be stationed in constant attendance outside the
space, also with breathing apparatus .
Personnel charging or repairing refrigeration plants should fully
understand the precautions to be observed when handling the refrigerant.
When refrigerant plants are being charged through a charging
connection in the compressor suction line, it is sometimes the practice to
heat the cylinder to evaporate the last of the liquid refrigerant. This should be
done only by placing the cylinder in hot water or some similar indirect
method and never by heating the cylinder directly with a blow lamp or other
flame. Advice on the handling and storage of gas cylinders is given in section
If it is necessary for repair or maintenance to apply heat to vessels
containing refrigerant, appropriate valves should be opened to prevent build-
up of pressure within the vessels.
Refrigeration system components Centrifugal,reciprocating, or screw compressors. Modern Shell and tube type condensers.Various refrigerant types, refrigerant flow control valves & Ancillary fittings etc.....
Modern refrigerants for cargo ships
In all refrigeration, heat is collected in a suitable fluid and this fluid is removed from the space substance being cooled carrying the heat with it. Such fluid known as refrigerant. All refrigerants using on board might be sub-divided into primary and secondary refrigerants.....
Choice of refrigerants
Theoretically, almost any liquid can be used as a refrigerant if its pressure/temperature relationship is suitable for the conditions. Although no perfect refrigerant is known, there are certain factors which determine a refrigerant's desirability for a particular duty and the one selected should .....
Cargo refrigeration procedure Refrigerated cargo vessels usually require a system which provides for various spaces to be cooled to different temperatures. The arrangements adopted can be considered in three parts: the central primary refrigerating plant, the brine circulating system, and the air circulating system for cooling the cargo in the hold.....
How to troubleshoot refrigeration system faults
It is important that gas losses are minimized in systems. Gas used in this system is both expensive and a danger to health. The system is therefore to be kept in an absolutely gas-tight condition. On no account should the refrigerant be blown off to atmosphere. Before carrying out repairs the refrigerant should be pumped down to the liquid receiver or the condenser. The remaining gas should be vented off and the area well ventilated.....
Safety precautions for refrigeration plant and refrigerated compartments Adequate information should be available on each vessel, laying down the operation and maintenance safeguards of the refrigeration plant, the particular properties of the refrigerant and the precautions for its safe handling.....
Reefer container Individual containers with their own refrigeration plant are connected to the 440 or 220 a.c. sockets provided on deck. 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 pneumatically......
Marine machineries - Useful tags
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Various refrigerants ||
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