Section 1 General requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 3 Additional Class Notations - Part 1 Ship Type Capability - Chapter 2 Provision Refrigeration - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 2 Provision Refrigeration

1.1 General

1.1.1 This Chapter states the requirements for ships having centralised refrigeration systems, designed to reject heat from provision refrigerated stores and are in addition to the relevant requirements of the Rules and Regulations for the Classification of Naval Ships (hereinafter referred to as the Rules for Naval Ships) contained in Volumes 1 and 2.

1.1.2 The requirements, which are optional, cover arrangements, equipment, and systems necessary for effective provision refrigerated stores arrangements on board a naval ship.

1.1.3 Ships complying with the applicable requirements of this Chapter will be eligible for the optional machinery class notation PRM (Provision Refrigeration Machinery).

1.2 Documentation required for design review

1.2.1 Three copies of the plans and information stated in Vol 3, Pt 1, Ch 2, 1.2 Documentation required for design review 1.2.2 are to be submitted to Lloyd’s Register (hereinafter referred to as ‘LR’) as applicable.

1.2.2  System Design Description. A System Design Description, see Vol 2, Pt 1, Ch 3, 3.5 System design description, of the refrigeration system(s) that details system capability and functionality under defined operating and emergency conditions within the normal concept of operation role of the ship. The arrangements for refrigerated stores for the ship are to be agreed between the designer and the Owner and are to be specified in the System Design Description.

1.2.3  Systems. Plans in diagrammatic form showing refrigerant and cooling systems, control systems and safeguards and electrical systems covered by this Chapter. Plans are to show pipe sizes, flows and terminal locations. The capacities of fans and pumps are to be included. Capacity tables for different operating conditions for the refrigeration compressors are also to be included.

1.2.4  Compartments. Plans showing the general arrangement of refrigeration plant compartments, together with a description of the equipment and arrangements installed for isolation and distribution of ventilation air and the electrical power supply systems. The plans are to indicate segregation and access arrangements for compartments and associated control rooms/stations.

1.2.5  Testing and trials procedures. A schedule of testing and trials to demonstrate that systems are capable of operating as described in Vol 3, Pt 1, Ch 2, 3 Refrigerating machinery and refrigerant storage compartment arrangements and as required by Vol 3, Pt 1, Ch 2, 6 Testing and trials.

1.2.6  Operating manuals. Operating manuals are to be provided on board and submitted for information where requested by LR. The manuals are to include the following information:

  1. Particulars and a description of the systems.

  2. Operating instructions for the equipment and systems (including fire isolation aspects).

  3. Maintenance instructions for the installed arrangements.

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