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 2 Machinery and Engineering Systems - Part 11 Support Systems - Chapter 2 Heating, Ventilation and Cooling Arrangements - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 2 Heating, Ventilation and Cooling Arrangements

1.1 General

1.1.1 This Chapter states the requirements for heating, ventilation and cooling arrangements (HVAC) systems installed in naval ships.

1.1.2 The requirements in this Chapter cover arrangements, equipment, and control systems necessary for effective heating, ventilation and cooling arrangements on board a naval ship.

1.2 Scope

1.2.1 HVAC systems included in this Chapter cover the following as applicable.

  1. Crew and embarked personnel spaces.

  2. Magazines and stores and spaces containing flammable liquids and gases.

  3. Storerooms, workshops, sewage handling spaces.

  4. Galleys

  5. Medical spaces

  6. Welldecks

1.2.2 This Chapter also includes requirements for smoke clearance.

1.2.3 Machinery space ventilation systems are to comply with Vol 2, Pt 1, Ch 3, 5.9 Ventilation.

1.2.4 Pump room ventilation systems are to comply with Vol 2, Pt 7, Ch 4, 3 Pump rooms as applicable.

1.2.5 Vehicle, helicopter and aircraft space ventilation arrangements are to comply with Vol 2, Pt 9, Ch 5, 4.10 Requirements for oil supply ships intended for the carriage of oil cargoes in bulk as applicable.

1.2.6 CBRN Protection guidance for ventilation is contained in Vol 2, Pt 1, Ch 3, 4.12 Guidance for CBRN protection, detection and monitoring.

1.2.7 The requirements of Vol 2, Pt 7, Ch 5 Ship Type Piping Systems are also applicable where a chilled water system is used for cooling purposes.

1.2.8 Battery room ventilation arrangements are to comply with Vol 2, Pt 9, Ch 2, 7.5 Thermal management and ventilation.

1.3 Documentation required for design review

1.3.1 Three copies of the plans and information stated in Vol 2, Pt 11, Ch 2, 1.3 Documentation required for design review 1.3.2 to Vol 2, Pt 11, Ch 2, 1.3 Documentation required for design review 1.3.6 are to be submitted to Clasifications Register (hereinafter referred to as 'LR') as applicable.

1.3.2  System Design Description. A System Design Description of the HVAC systems. See Vol 2, Pt 1, Ch 3, 3.5 System design description and Vol 2, Pt 11, Ch 2, 2.4 Refrigerant systems for cooling 2.4.1, Vol 2, Pt 11, Ch 2, 2.5 Heating plant 2.5.1, Vol 2, Pt 11, Ch 2, 2.6 Filtration units for air intakes 2.6.1, Vol 2, Pt 11, Ch 2, 3.1 General 3.1.2.(d), Vol 2, Pt 11, Ch 2, 3.1 General 3.1.4, Vol 2, Pt 11, Ch 2, 3.3 Galleys 3.3.1, Vol 2, Pt 11, Ch 2, 3.6 Smoke clearance 3.6.1 and Vol 2, Pt 11, Ch 2, 5.3 Trials 5.3.1 for specific references to the System Design Description.

1.3.3  Systems. Plans in diagrammatic form showing air intake/exhaust/distribution arrangements, control systems and safeguards and electrical systems covered by this Chapter. Plans are to show trunk/pipe sizes, air/water flows and terminal locations. The capacities of fans, pumps and heating/cooling/filtration plants are to be included. A sizing calculation summary containing the loads, margins, assumptions and calculation method is to be provided. Capacity tables for different operating conditions for the refrigeration compressors are also to be included.

1.3.4  Compartments. Plans showing the general arrangement of compartments, together with a description of the equipment and arrangements installed for isolation, heating/ cooling/filtration 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.

1.3.5  Testing and trials procedures. A schedule of testing and trials to demonstrate that systems are capable of operating as described in Vol 2, Pt 11, Ch 2, 3 System arrangements.

1.3.6  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.

Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.