AO-100-12-F020-980002_rev01Open

HVAC TECHNICAL BUILDING SPECIFICATION

Document Number:

AO-100-12-F020-980002 Revision : 01 open Status : IFR

Rev. Date : 10-Jun-2014

Doc. Type : PHI Discipline : HVA Phase: DE Class: 1 Page 1 of 21

CTR Ref.: F10282-SSA-0TP2-HVA-PHY-980002 System / Subsystem : 09 Equipment Type :

This document is the property of TOTAL E&P Angola BLOCK32 Ltd and shall not be disclosed to third parties or reproduced

without permission of the owner

KAOMBO

Project

This document has been generated by an Electronic Document Management System. When printed it is considered as a for information only copy. The controlled copy is the screen version and it is the holders responsibility that he/she holds the latest valid version.


01 Open IFR 10-Jun-2014 Open revision for Tender Bulletin R. Moutier B. Salaun A. Douet

00 IFR 15-Apr-2014 Issued For Company Review R. Moutier A. Douet R. Moutier

HA IDC 13-Mar-2014 Case 3 LLI Period- Interdiscipline check R. Moutier A. Douet S. Dellion

Rev. Status Date Revision Description Issued by Reviewed by Approved by


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Revision list:

Rev.Nr Modifications:

01 Implementation of Company Comments

00 Chilled water system

HA First Issue

Hold list:

Hold Nr

Hold Description:

1 Page 10 : Classification Society to be nominated


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TABLE OF CONTENTS

1 INTRODUCTION ............................................................................................................... 5 1.1 KAOMBO PROJECT DESCRIPTION ........................................................................................................... 5 1.2 SCOPE OF THE DOCUMENT ...................................................................................................................... 5 1.3 REFERENCE DOCUMENTS, DEFINITIONS AND ABBREVIATIONS ........................................................ 5 1.4 CODES & STANDARDS ............................................................................................................................... 6 1.5 PROJECT DOCUMENTS .............................................................................................................................. 7 1.6 ORDER OF PRECEDENCE .......................................................................................................................... 7 1.7 DEFINITIONS ................................................................................................................................................ 8 1.8 ACRONYMS .................................................................................................................................................. 8 1.9 UNITS & LANGUAGE ................................................................................................................................... 9

2 GENERAL REQUIREMENTS ........................................................................................... 9

3 HVAC SYSTEM................................................................................................................. 9 3.1 AIR CONDITIONED AREAS ....................................................................................................................... 10 3.2 HVAC MAIN ARCHITECTURE ................................................................................................................... 10 3.2.1 Air locks ....................................................................................................................................................................... 11 3.2.2 Battery room ................................................................................................................................................................ 11 3.2.3 Laboratory .................................................................................................................................................................... 12 3.3 NON-ESSENTIAL, ESSENTIAL, EMERGENCY SYSTEMS ...................................................................... 12 3.4 SPARING & REDUNDANCY CRITERIA/PHILOSOPHY ........................................................................... 12 3.5 CONDITIONED AIR SYSTEM ..................................................................................................................... 13 3.6 PRESSURISATION CRITERIA ................................................................................................................... 13 3.7 PRESSURE MONITORING ......................................................................................................................... 13

4 POWER and CONTROL PANEL .................................................................................... 14 4.1 POWER SECTION ...................................................................................................................................... 14 4.2 CONTROL SECTION .................................................................................................................................. 14

5 SAFETY PHILOSOPHY .................................................................................................. 15 5.1 INTEGRATION WITH FIRE & GAS SYSTEM ............................................................................................ 15 5.2 FIREPROOFING .......................................................................................................................................... 15 5.3 OUTDOOR AIR INTAKES DESIGN ............................................................................................................ 15

6 NON ESSENTIAL, ESSENTIAL, EMERGENCY HVAC SPARING ................................ 17

7 HVAC EQUIPMENT ........................................................................................................ 18


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7.1 CHILLED WATER UNITS WITH AIR COOLED DRY-COOLERS.............................................................. 19 7.2 AHU AIR HANDLING UNITS ................................................................................................................... 19 7.3 EXTRACT FANS ......................................................................................................................................... 20 7.4 DUCT HEATERS ......................................................................................................................................... 20

8 HVAC SYSTEM DISTRIBUTION .................................................................................... 20 8.1 HVAC BULKHEAD/DECK PENETRATIONS ............................................................................................. 20 8.2 DUCT DISTRIBUTION (SUPPLY, RECIRCULATION& EXHAUST) ......................................................... 21 8.3 ARCHITECTURAL & LAYOUTS ................................................................................................................ 21

9 SCOPE OF WORK .......................................................................................................... 21


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1 INTRODUCTION

1.1 KAOMBO PROJECT DESCRIPTION

Refer to document AO-100-10-F020-090406 Project Presentation for details.

1.2 SCOPE OF THE DOCUMENT The purpose of document is to cover the general conditions and minimum requirements for the design, engineering, supply, fabrication, assembly, testing, inspection, packing and documentation for HVAC equipment for the Topside Technical Building

This specification provides the design description, the general philosophy, for the HVAC System of the Technical Building named P2 module, part of the FPSO conversion for ANGOLA BLOCK 32, KAOMBO Project.

The construction of the LER building will be subcontracted to a SUB-CONTRACTOR as an EPC contract.

This document is issued to help the SUB-CONTRACTOR in his offer.

The document shall be read together with last revision of following documents:

AO-100-10-F020-970006 HVAC Basis of Design Which includes the basic design assumed for sizing the HVAC system and lists the target requirements to be achieved by HVAC.

AO-100-10-F020-970085 HVAC Block Diagram, Which shows the schematic description of cooling systems, air treatment, air distribution, exhausting, and so on, for each area of the FPSO, including Module P2

AO-100-12-F020-980001 HVAC DID & PID TECHNICAL BUILDING P2 Which shows all the equipment and instruments of the HVAC systems of the module P2

AO-100-12-F020-980003 HVAC TECHNICAL BUILDING P2 EQUIPMENT SPECIFICATION Which defines the technical requirements for the supply of main equipment and instruments of the HVAC systems of the module P2

The most important topics covered in this specification are:

HVAC systems general description and architecture Equipment to be provided Sparing and redundancy criteria Electrical power supply system and load management. Pressurization criteria F&G interface and Control criteria Main equipment list summary and description (preliminary sizing)

1.3 REFERENCE DOCUMENTS, DEFINITIONS AND ABBREVIATIONS The air conditioning systems shall be designed, installed, tested and commissioned in accordance with the following standards and all associated reference documents listed in the standards or the amendments to the Standards.


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1.4 CODES & STANDARDS AMCA Air Movement and Control Association International

ASHRAE American Society of Heating, Refrigeration and Air Conditioning Engineers, Handbooks and codes

ISO 15138 International Organization for Standardization, Petroleum and natural gas industries Offshore production installations Heating, Ventilation and Air-Conditioning

SMACNA Sheet Metal and Air conditioning Contractors National Association (Duct design, testing adjusting, balancing)

ISO 9943 Ventilation and air treatment for galleys on board ships;

ISO 7547 Ships and marine technology Air-conditioning and ventilation of accommodation spaces Design conditions and basis of calculations

ISO 9614-1 Acoustics Determination of sound power levels of noise sources using sound intensity;

NS-5575 [28] Ductwork Identification

EN 14175 Fume cupboards

EN 378 Refrigerating systems and heat pumps

EN 1886 Ventilation for building-Air handling units-Mechanical performance

EN 13053 Ventilation for buildings - Air Handling Units - Ratings and performance for units, components and sections

IEC/CEI Standard for Electrical System

IEC 60529 Degree of protection provided by enclosure (IP code)

IEC 60332 Flame proof cables testing procedures

IEC 60331 Fire resisting cables testing procedures

IEC 60079 Electrical apparatus for explosive gas atmospheres

IEC Ex scheme Conformity assessment scheme for electrical equipment for use in hazardous locations based on IEC standards

Directive 94/9/EC European Directive on the approximation of the laws of the Member State concerning equipment and protective systems intended for use in potentially explosive atmosphere

Directive 96/98/EC European Council Directive on Marine Equipment (MED)

IMO International Maritime Organisation

SOLAS Safety of Life at Sea, International Maritime Organisation

MODU Code of the Construction and Equipment of the Mobile Offshore Drilling Unit

BUREAU VERITAS Rules for Classification of Ships and Offshore Units

NFPA 45 Standard on Fire Protection for Laboratories Using Chemicals

NFPA 2001 Standard on Clean Agent Fire Extinguishing Systems


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EN 50272-2 Safety Requirements for Secondary Batteries and Battery Installations Stationary Batteries

1.5 PROJECT DOCUMENTS AO-101-10-F002-101853 FPSO General arrangement (and all Layout Documents)

AO-100-10-KAFP-000043 FPSO Basis of Requirement (BOR)

AO-100-12-F020-199502 Topside Technical Building Module P2 Architectural Layout

AO-100-10-F020-410324 Topsides Technical Building Layout

AO-101-10-F020-500198 Instrument Room Layout

AO-100-10-F020-411102 Electrical Equipment List Topsides

AO-101-11-F002-002116 ITR Layout Drawings Topside P2

AO-100-10-F020-500006 Instrument Design And Installation Specification

AO-100-10-KAFP-000066 FPSO HSE Minimum requirements

AO-100-10-KAFP-000068 FPSO Functional Specification

AO-100-10-F002-001501 Electrical Equipment List

AO-100-00-KAFP-000001 B32 METOCEAN DESIGN CRITERIA AO-100-10-F020-851010, AO-100-10-F020-851011 & AO-100-10-F020-851012 FPSO Hazardous

area drawings

AO-100-10-F020-410109 Electrical Specification for package

AO-100-10-F020-500007 Package Instrumentation Specification

AO-100-10-F020-410110 Induction Motor Specification

AO-100-12-F020-980001 HVAC D&ID and P&ID for module P2

AO-100-12-F020-980003 HVAC Technical Building Equipment specification

AO-100-10-F020-970006 HVAC Basis of Design

AO-100-10-F015-971802 HVAC Design Philosophy

AO-100-12-F020-700026 Topsides accelerations and motions design values

1.6 ORDER OF PRECEDENCE Should be any conflict, discrepancy, inconsistency or ambiguity between any of the applicable documents and codes, the following order of precedence shall be applied:

1. Angola-enforced Rules and Regulations (on SITE)

2. Flag State Regulations (during Transit) and IMO (during Transit and on SITE)

3. Project technical specifications and documents from COMPANY

4. BV class and certification rules

5. CONTRACTOR Project technical specifications and documents

6. International codes, rules and regulations (including International Marine Standards and Guidelines, Industry/Oil Industry Codes and Standards)


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In case of different but not conflicting requirements, the most stringent shall be applied. In case of conflicting requirements, CONTRACTOR shall be advised in writing for settlement of the conflict.

1.7 DEFINITIONS The following definitions, shall apply to this specification, for all other detailed definitions, refer to General Project Specifications

COMPANY TOTAL E&P ANGOLA BLOCK 32 Ltd

CLASSIFICATION SOCIETY HOLD

CONTRACTOR Means the party appointed by COMPANY for the engineering, procurement, supply, construction and commissioning of two converted FPSOs

INTEGRATION YARD Means the shipyard in charge of the integration of the P2 modules on each FPSO

SUBCONTRACTOR Means the party appointed by CONTRACTOR to perform the WORK

MANUFACTURER/VENDOR Means the party which builds up/provides equipment and/or materials required for the scope of work

SCOPE OF WORK Includes all the activities related to engineering, supply, fabrication, testing, packing, commissioning and start-up, which are requested according to this specification and relevant attachments

SITE Means the position in Angola where the FPSO will be moored and operated

1.8 ACRONYMS AC/h Air Change per hour

E&I Electrical and Instrumentation

FPSO (unit) Floating, Production, Storage and Off-loading Unit;

AHU Air handling unit

CWU Chilled water unit

FCU Fan coil unit

PLC Programmable Logic Controller

HPLC HVAC Programmable Logic Controller

DCS Distributed Control System

ICSS Integrated Control and Safety System

PCS Process Control System

ESD Emergency Shut-Down

F&G Fire & Gas

FGS Fire & Gas System

UPS Uninterrupted Power System

ATEX Atmosphere Explosible.


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RH Relative Humidity

For all other detailed technical abbreviations of equipment, refer to General Project Specifications

1.9 UNITS & LANGUAGE SI units shall be used.

The English language shall be used in all correspondence, communications and Engineering document submittals

2 GENERAL REQUIREMENTS All HVAC systems and associated equipment shall be designed in accordance with Class rules

requirements as necessary (The LER being on the Topsides, above the main deck, it is not subject to Classification) international marine standards (IMO & SOLAS) and to Company Specifications FPSO HSE MINIMUM REQUIREMENTS and FPSO FUNCTIONAL SPECIFICATION for at least 20 year operational life time in a highly corrosive marine environment.

All HVAC equipment shall be designed taking into account the expected accelerations and movements of a floating marine vessel, during all the phases of its operational life, including towing phase between construction yard and site. In particular attention is to be paid to oil and lubrication systems of equipment.

The HVAC systems shall operate under all sea conditions forecasted from the conversion yard up to those which will be met on the production site. Note the temperature and environmental conditions shall not be guaranteed during transit, only final site conditions. The systems shall be designed to operate at all times however regardless of the conditions, including commissioning.

Chiller, Requirements included in EN 378 shall be strictly enforced and considered for the design of the HVAC plant rooms.

The HVAC systems shall not be used for smoke removal.

All duct penetration inside a fire-rated wall, bulkhead or deck shall be equipped with a fire damper irrespective of size.

Pressurization shall be provided in all airlocks and rooms having a direct aperture to outdoors.

When the use of a gaseous fire extinguishing agent is foreseen and when all fire & gas-tight damper are closed, a specific system shall be installed to prevent overpressure and underprerssure in the space where the gaseous fire extinguishing agent is released.

HVAC equipment on the FPSO (LQ, Hull, Topsides, Turret, etc.) shall be standardized as much as possible in order to reduce management of operation, maintenance and spare parts.

HVAC CFC and HCFC gases are not allowed in accordance with the Montreal Protocol.

3 HVAC SYSTEM The HVAC systems for Topside module P2 shall keep the internal climatic conditions required (i.e. temperature, humidity) for each served room, space or area as described in project HVAC Basis of Design AO-100-12-F020-970006.

HVAC systems shall be sized according to the local climatic referenced conditions.

Hereafter are briefly summarized the main design criteria for the sizing of HVAC:


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- to keep comfortable indoor climatic conditions within noise, air quality & velocity tolerances in accordance with ISO 15138 (temperature and relative humidity) for people on-board, in hot season / cold season condition, for all Operational Spaces/Rooms.

- to provide controlled climatic conditions within the spaces for normal and safe operation of electrical and electronic equipment into Technical Rooms & Battery Rooms etc (to remove the heat loads).

- to provide a proper ventilation and to exhaust polluted air from specific areas like Battery Room and, Laboratory.

- to keep the required overpressure (with respect the outside), in order to prevent penetration of toxic or hazardous gases from outside process areas.

- to provide an automatic operating mode without human intervention, except to repair an equipment failure and for normal maintenance.

- to provide a proper integration with the vessels F&G system, in order to perform the automatic shut-off of external air supply to specific internal spaces in case of emergency.

- to provide a selected, controlled and progressive shutdown of the HVAC loads in case of power supply failures.

3.1 AIR CONDITIONED AREAS The following areas for the Topsides P2 Building shall be air conditioned:

HVAC plant room at 25C Relative Humidity not controlled, between 40 and 65%

Laboratory (2 people), office space and airlock at 24C Relative Humidity between 40 and 60%

Battery Room at 25C Relative Humidity not controlled, between 40 and 65%

Instrument Room (2 people) and associated airlock at 25C Relative Humidity between 40 and 60%

Electrical Room (2 people) and associated airlock at 25C Relative Humidity between 40 and 60%

E & I Workshop (10 people) and associated airlock at 24C. Relative Humidity between 40 and 60%

3.2 HVAC MAIN ARCHITECTURE Air conditioning will be performed using a CHILLED WATER, system will be mainly composed of:

2 Water cooled Chilled Water Units 2 x 100% with Dry Coolers 2 x 100% to provide chilled water to the chilled water network which serves the AHU coils,

2 Chilled water pumps 2 x 100%, 2 cooling water pumps 2 x 100% and associated pipework accessories,

2 AHU(s) 2 x 100% for safe area with chilled water cooling coil, to provide conditioned air to the E&I rooms, the battery room and the laboratory, through ductwork,

In addition, the following equipment will be installed :

Duct mounted electrical reheaters for a room by room temperature control,

Exhaust fans, installed on the roof of P2 building, for battery room 2 x 100% (suitable for use in hazardous area zone 1 IIC T3), laboratory 2 x 100% (suitable for use in hazardous area zone 1 IIC T3) and HVAC Plant Room 2 x 100% (suitable for use in hazardous area zone 2 IIA T3),

Boundary Fire & Gas Tight Dampers at the envelope of the building,

Internal Fire Dampers, on partitions,


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Ductwork and pipework,

Overpressure control and monitoring system with atmospheric pressure distribution,

1 Electrical and control panel 1 x 100% with distribution, installed in HVAC Plant Room .

3.2.1 Air locks The Air lock pressure is maintained at 50 Pa using a counterweight pressure release damper manually adjustable.

Monitoring is ensured by differential pressure Transmitter (PDT) and the whole is connected to the HPLC.

3.2.2 Battery room Due to the quantity of battery cells to be installed, the battery room is composed of 2 decks in the same room volume, one at level 43 900 and one at level 45 850. Access to each level will be from outdoors.

The Battery room pressure is maintained slightly below pressure of surroundings using EXHAUST air AHUs. However it is maintained over pressured compared with OUTDOORS (30Pa).

The supply airflow is constant.

The indoor pressure is controlled by using an actuated electrical control damper installed on the exhaust duct.

No access airlock will be installed for the battery room.

The philosophy of ducting in battery rooms shall be as shown on the following sketch:


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SUPPLY air duct shall be done at 0.5 meter from the floor to dilute and lift light gases up to the ceiling. EXTRACT air ducts shall be: for 80% of the extracted airflow, for 2 x 10% for heavy gases from the battery cells electrolyte, at 0.05 meter from the floor. The battery room will have hydrogen detection system. Upon confirmed H2 detection within the room, the F&G system will stop the battery chargers to eliminate the source of gas. Ventilation will be kept on running and allow sufficient dilution of hydrogen emitted during boost charge.

3.2.3 Laboratory The laboratory is situated at level 2 of the P2 building.

The laboratory is one room with a dedicated office area inside the room, with partitions to isolate it.

No air recirculation will take place for the laboratory.

The Laboratory pressure is maintained slightly below pressure of surroundings using EXHAUST air AHUs. However it is maintained over pressured compared with OUTDOORS (30Pa).

The office will be over pressurized at 50 Pa, a little bit over the pressure of the laboratory.

The air supply will be done by the main AHU.

Temperature inside the laboratory will be controlled using a duct mounted electrical heater, situated on the supply duct.

Air will be extracted by 4 fume cupboards with mobile sash and 3 hood above gas chromatographs.

Airflow delivered to the laboratory will be constant.

Airflow exhausted through the cupboards will be variable depending on the position of the sashes.

If airflow through the cupboards decreases, the pressure in the room will increase and it is necessary to extract air directly in the laboratory.

The indoor pressure in the laboratory is controlled by using an actuated electrical control damper installed on the exhaust duct. The extracted airflow will remain constant whatever the position of the sashes on the 4 fume cupboards. If sashes are closed the main part of the airflow will be extracted by the main exhaust duct.

All Extract equipment for the laboratory will be suitable for use in hazardous area Zone 1 IIC T3.

3.3 NON-ESSENTIAL, ESSENTIAL, EMERGENCY SYSTEMS All HVAC systems on the P2 module are considered as ESSENTIAL and will be powered by the ESSENTIAL DIESEL GENERATORS installed in the Aft Machinery Space.

All HVAC systems on the P2 module will be stopped in case of Emergency and will not be powered by the EMERGENCY DIESEL GENERATOR. Other equipment Electrical and Instrumentation equipment in the P2 module will also be de-energized.

3.4 SPARING & REDUNDANCY CRITERIA/PHILOSOPHY The sparing and REDUNDANCY HVAC criteria are following listed and summarized:

E&I ROOMS AHU Systems 2 units 100%, 1 running, 1 stand by

EXTRACT FAN Systems 2 units 100%, 1 running, 1 stand by

CHILLED WATER SYSTEM 2 units 100%, 1 running, 1 stand by


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CONTROL PANEL 1 unit 100% with SIL2 PLC

More details about the sparing can be found in document AO-100-12-F020-980001 HVAC DID & PID TECHNICAL BUILDING P2.

The swap between the Duty unit and the Stand-by unit will be automatic and controlled by the HPLC.

3.5 CONDITIONED AIR SYSTEM The Conditioned Air shall be produced by Air Handling Units for the needs of the Topside Building P2 (inclusive Laboratory). All AHUs shall be located inside HVAC PLANT ROOM .

The Conditioned Air distribution will be provided by means of separated air duct networks, depending on the room functions.

Refer to AO-100-12-F020-980001 HVAC DID & PID TECHNICAL BUILDING P2.

3.6 PRESSURISATION CRITERIA In order to control the quality of the indoor air and prevent the possible penetration and contamination with polluted air, in terms of smell and odour, or toxic and Hazardous gases, it is necessary to have a pressure differential between the different spaces.

To control the pressurization the following basic requirements shall be satisfied:

P2 technical building will be located close to an hazardous area and therefore shall be maintained at a positive pressure relative to outdoor,

All areas housing hazardous equipment, like battery rooms, laboratory shall be maintained at a slight negative pressure relative adjacent spaces.

The compartments with overpressure relative to atmosphere (air locks, technical rooms etc.) shall be fitted with internal pressure relief damper discharging air to the atmosphere (barometric type when possible, otherwise gravimetric, set to maintain a positive air flow to atmosphere).

The pressurization values shall be the following:

Airlocks and any room having a direct aperture to outside : 50 Pa.

Some specific airlocks could be at 30 Pa if there are giving access to an hazardous room of if it is safer to have the room at a higher pressure than the airlock for safety purposes.

No negative pressure in room which have a direct contact with outside.

Slightly negative pressure relative to adjacent room in order to prevent specific pollution to move to clean adjacent room.

3.7 PRESSURE MONITORING The overpressure must be monitored on a continuous basis within the different rooms.

The pressure alarm shall be indicated in the HVAC control panel & shall be raised to the ICSS using a serial link.

In order to mask loss of overpressure due to opening of doors, the transmission of fault signal shall be on a time delay of 30 seconds - 1 minute (user adjustable).


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4 POWER AND CONTROL PANEL All electrical equipment shall comply with applicable ATEX or IEC directives for operation in potentially explosive Areas, when installed in hazardous areas or installed outdoors. Equipment installed in HVAC Plant Room shall be for safe area.

Earthing of electrical equipment, ductworks and piping relevant to HVAC systems shall be according to applicable rules.

The Control and Power panel will be installed in HVAC Plant Room and include 2 sections :

4.1 POWER SECTION Power supply is 440V 3 Phases 60 Hz, 3 wires IT earthing, neutral not distributed, from 2 sources, NORMAL or ESSENTIAL.

All motors and packages with an electrical power less or equal to 90 kW shall be powered by the HVAC power and control panel.

This applies to AHU, extract Fans, duct heaters, chilled and cooling water pumps and dry coolers.

Above this 90 kW, power will come directly from the ESSENTIAL 440 V switchboard in Electrical room. This applies to the chillers.

P2 MODULE HVAC Panel will be located inside the HVAC Plant Room of P2 Module

HVAC panel power section will be fed by 2 independent AC power supplies (designated A and B) :

1. Normal supply (Gas turbines Generators), fed by 440V Normal Switchboard (440V, 3ph, 60 Hz) situated in P2 electrical room, supply A.

2. Essential supply (Essential Diesel Generators), fed by 440V Essential Switchboard (440V, 3ph, 60 Hz) situated in P2 electrical room. Supply B.

In case of failure of the main Gas Turbines, the Essential Diesel Generators will be started up and main power will come back after a few minutes.

All HVAC equipment which have been stopped due to power shortage shall be restarted automatically.

Each power section of the panel will be fed by two different bars of the above mentioned panels (A and B), so that they shall be able to supply the HVAC users, whichever is the activated bar.

4.2 CONTROL SECTION The PLC will be electrically fed (230V 60Hz one phase) by 2 off independent AC UPS power supplies (designated UPS-A and UPS-B) and shall supervise the following functions:

a) Communicate with FPSO control system PCS, ESD and FGS, either hardwired for safety function or by serial link for monitoring functions.

b) Control the HVAC systems, dealing with all equipment, dampers, valves, temperature and pressure control, instruments and so on.

c) Perform the automatic changeover in case of faults and manage alarming.

d) Trending and event logging.

The HVAC control systems shall perform temperature control, pressurization, automatic duty/standby changeover, system monitoring and alarms, event logging, and the automatic start-up and shutdown of equipment and systems in a logical and safe sequence. Monitoring will also be available to the CCR


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during Normal and essential power generation modes via a serial link between the HVAC control panel and the PCS.

5 SAFETY PHILOSOPHY The HVAC system shall be in compliance with the Safety Rules for buildings defined in Projects specification FPSO HSE Minimum Requirements..

5.1 INTEGRATION WITH FIRE & GAS SYSTEM The HVAC system is not integrated with FGS. The only link between FGS and HVAC are hardwired link from FGS in order to shutdown part or all the HVAC system.

Gas detectors (provided by others) will be directly hardwired to the FGS, which will perform the necessary logic and initiates the fire fighting actions and stop the associated HVAC equipment.

In case of any detection from the F&G Sensors, a hardwired signal will be sent from FGS to the correspondent HVAC PLC, which will shut-down the HVAC equipment and close the F&G damper (according to the Cause & Effect Matrix).

After the FGS shutdown, any new Start-up of the HVAC equipment shall not be permissible without the FGS authorization / FGS reset.

The fire control and the fire zoning on the FPSO, and inside buildings shall be implemented in the design of the HVAC systems.

Fire & Gas dampers and fire dampers shall be electrically actuated with spring fail safe closing and controlled by the Fire and Gas System.

Fire dampers shall be closed on either signal from FGS, HPLC or on fusible link (74C) in the air stream.

Fire and gas tight dampers at the boundary of the P2 shall be controlled by the FGS (with Hardwired links). The opening and closure limit switches of the fire dampers shall be connected to the FGS. From the FGS the information shall be reported to the HVAC PLC (dual serial link), for any required action onto HVAC system.

Fire dampers on the internal partitions of the P2 shall be controlled by the HPLC (with Hardwired links). The opening and closure limit switches of fire dampers shall be connected to the HPLC (with Hardwired links). From the HPLC the information shall not be reported to the FGS.

In addition, in all ventilated spaces, the fire dampers shall be capable of being closed manually from both sides of the bulkhead/deck, according to Class rules requirements.

Each Fire Damper shall be easily accessible for maintenance and tests and provided with visible indication of current open/closed position.

5.2 FIREPROOFING All fire dampers provided shall keep the fireproofing of the rated bulkheads and decks wherever the HVAC ducts are penetrating in such structures and shall have an equivalent fire rating to the penetrated bulkheads and/or decks.

5.3 OUTDOOR AIR INTAKES DESIGN Each fresh air Inlet is equipped with the following accessories in stainless steel 316:

Downward cowl with insect screen


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Droplet separator

Coalescer filter

Air supplies shall be taken from, and exhausted to non-hazardous areas; the air intakes shall be installed more than 3 meters out of the hazardous area.

The air inlet shall be fitted with:

- Gas detectors

- Smoke detectors

- Fire & Gas dampers

The air outlets shall be fitted with Fire & Gas dampers.

The following air inlets and outlet shall be provided:

Air inlets & air Outlets of Topside Building P2

The fresh air ductwork shall be sized in order to have the necessary gas retention time from the detectors (on the fresh air intake) to the F&G dampers installed before entering the buildings.

A retention time of 6 seconds shall be taken for the sizing of the inlet duct :

4.0 seconds for the response time of the gas detector

0.5 second for the computing time of the F&G system

1.5 second for the closing time of the fire damper.

The size of Duct section and the air velocity shall be in accordance with the calculated gas retention time.

All outdoor air shall be made of stainless steel AISI 316L, even the part between HVAC Pant Room penetration and AHU.

Outdoor air ductwork shall be of fully-welded type, both longitudinal and transversal joints, in order to prevent gas ingress in the duct downstream the gas detectors.

Outdoor air ductwork having a long run outdoor shall be insulated or equipped with a solar shield to prevent air reheat.

Any air intakes and outlets are fitted at a minimum relative distance of 8m, in order to prevent loop contamination of potential polluted vapours.

Wherever applicable, air inlets and outlets shall be located on the same side of the superstructure, in order to limit the pressure differential due to wind effect.

Particular care shall be given in positioning the air inlets and outlets relatively to location of Hazardous areas on-board. The fresh air inlets shall be fitted at a proper location, at a minimum distance of 3m from a hazardous area and at a minimum distance of:

8m from non-hazardous ventilation exhaust

10m from hazardous ventilation exhaust

10m from engines/machines or thermal equipment exhaust (gas turbines, diesel motor, compressed air package, Chiller etc)

All the outlets from non-hazardous systems shall discharge into non-hazardous areas.


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Furthermore all provided air inlets related to HVAC systems shall be fitted with:

Fire/gas damper

2-stage filter/coalescer

3 number gas detectors

90 elbow or similar (to minimize wind effect)

Bird Grille / Insect Screen.

All air outlets shall be fitted with:

fire/gas damper

90 elbow or similar

Bird Grille / Insect Screen.

All air intakes shall be easily accessible and fitted with hinged doors in order to be manually closed whenever required.

The above considerations have to be applied to all air intake/outlet ducts provided for the AHU rooms and the compartments served by the HVAC systems in the Topsides.

The air inlets shall be provided with double air intakes port and starboard side and at a proper relative distance in order to prevent as far as possible simultaneous contamination by a cloud of dangerous gas coming from the FPSOs process areas, at the level of P2 top they are fitted with flammable gas detectors and dampers.

Each of the dual fresh air inlet ducts (2x100%) shall be fitted with gas and smoke detectors. The lengths and sections of ducts shall be designed in a way to allow a minimum retention time in order to ensure that the gas detectors will be able to shut the inlet dampers before the gas is reaching the enclosure.

All detectors shall be located in order to be easily accessible for calibration and maintenance purposes.

The detectors shall be linked to FGS system, which shall control F&G damper shut-off.

If a damper closes during normal operations, an alarm shall be raised and the corresponding fan shall be stopped to avoid mechanical damage to the system.

The control of the dampers shall be done from FGS.

The F&G damper status shall be reported to the PLC of the HVAC power and control cabinets, for action on the HVAC equipment.

For example:

- Confirmation of hydrocarbon gas or fire detection by smoke detectors in an HVAC inlet duct, will initiate the following actions:

Close all the gas dampers and all the fire dampers.

Stop the HVAC system.

6 NON ESSENTIAL, ESSENTIAL, EMERGENCY HVAC SPARING As per FPSO HSE Minimum Requirements AO-100-10-KAFP-000066, the spaces covered by the HVAC systems shall be subdivided among Non-Essential, Essential and Emergency categories, depending by different function of spaces and type of contained.


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The Non-Essential HVAC system shall serve the rooms where failure of the HVAC equipment will not cause any safety concerns.

The Essential HVAC system shall serve rooms where heating and/or ventilation and/or air conditioning and/or pressurisation must be continuously maintained during the following periods:

The Essential power supply from Essential Diesels Generators is available. The Normal power supply from Gas Turbine Generator is available. The Emergency HVAC systems shall serve critical rooms where air conditioning and/or heating and/or ventilation and/or pressurisation are required for safety reasons (life support) and by SOLAS in an emergency situation.

For the AHU(s) and fans the following configuration will be adopted:

Essential HVC system of the P2 is composed of : o Two AHU(s) with 100% of capacity each (1 running + 1 in stand-by) o Three sets of two Extract fan units with 100% of capacity each (1 running + 1 in standby) o Two Water Cooled Chiller Units with 100% of capacity each (1 running + 1 in stand-by) o Two Air Cooled Dry Cooler Units with 100% of capacity each (1 running + 1 in stand-by) o Two sets of cooling and chiller water pumps with 100% of capacity each (1 running + 1 in stand-by) o One Power and Control electrical panel

Maintenance on the stand-by unit shall not impair the operating condition of the running unit. Ductwork and pipework cross-over shall be designed in order to operate equipment A with associated equipment B in order to not lose availability.

The HVAC system of the Topsides module P2 is considered as Essential but is not considered as Emergency and therefore will not be connected to the EmDG.

AREA and ROOMS SERVED BY ESSENTIAL HVAC SYSTEM

The Essential HVAC system is provided for the following areas:

P2 TOPSIDE BUILDING Electrical room at level 37.900 Instrument and Telecom room at level 42.900 HVAC plant room at level 42.900 Laboratory at level 42.900 Battery room at level 42.900 E&I workshop at level 37.900 All access airlocks at level 37.900 and level 42.900

7 HVAC EQUIPMENT Scope of this paragraph is to summarize the technical characteristics of HVAC Equipment and their relevant accessories.


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Capacities indicated below for the equipment, are preliminary and to facilitate the work of the BIDDERS but shall be confirmed by the SUBCONTRACTOR though an appropriate heat loads calculation note and equipment sizing.

Values indicated below cannot be considered as Contractual.

7.1 CHILLED WATER UNITS WITH AIR COOLED DRY-COOLERS System composed of :

1. Two Water Cooled Chilled Water Units with two air cooled Dry Coolers situated outdoors

2. Two AHU Air Handling Units with chilled water cooling coil situated in HVAC Plant Room

The main equipment shall be the following . Capacities & volumes shall be verified by VENDOR.

EQUIPMENT DESCRIPTION (Motors 440V

3ph 60Hz)

DUTY / STAND-BY LOCATION SERVED ZONE COOLING POWER

(kW)

COOLING TYPE

Water cooled Chilled water units A and B

2 x 100% Duty & Stand-by

Level 2 HVAC Plant Room

P2 Topside Main AHU & Lab AHU 490

Water Cooled / Dry Cooler

Air cooled dry cooler A and B hazardous area Rated


Level 3 Roof

680 Outdoor dry cooler

Cooling loop Water Pumps A and B Centrifugal, electric driven


P2 Topside HVAC Plan Room level 2

Topside AHU

22.32 l/s 400 kPa

Chilled Water loop Pumps A and B Centrifugal, electric driven


P2 Topside HVAC Plan Room level 2

Topside AHUs

20.24 l/s 500 kPa

7.2 AHU AIR HANDLING UNITS HVAC system include two AHUs for the cooling needs of the P2 topside.

The design of such units shall be compliance with high quality marine grade equipment with a proven track record in marine installations in self-propelled ocean going vessels.

The main composition of AHUs is complete of shut-off dampers, mixing box, plane filter, bag filter, chilled water cooling coil, droplets separator, supply fan.

Air flow will be constant and a variable frequency drive will be installed to control the fan speed keep the airflow constant whatever the clogging of filters.

Refer to D&ID for details.

The AHU shall be the following . Capacities & volumes shall be verified by VENDOR at detail design. EQUIPMENT

DESCRIPTION (Motors 440V 3PH 60HZ)

SERVED AREA

LOCATION SERVED ZONE QUANTITY TOTAL SUPPLY AIR

FLOW

STATIC SUPPLY

PRESSURE

COOLING POWER

COOLING TYPE

NUMBER m3/s (Pa) (kW)

Electrical & Instrument AHU A and B

P2 Topside

Level 2 HVAC Plant

Room

Elec room IT room

Battery room Laboratory

2 18.34 2100 Pa 470 kW Chilled water


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7.3 EXTRACT FANS HVAC system include different type of fans for the need of the P2 topside.

Exhaust fan

The extract fans shall be the following . Airflows and capacities shall be verified by VENDOR are to be verified at detail design.

EQUIPMENT DESCRIPTION SERVED AREA LOCATION SERVED

ZONE Quantity AIR FLOW

STATIC SUPPLY PRESSURE

No m3/s Pa HVAC Plant Room extract fan A and B P2 module Roof of Level 2 HVAC room 2 1.94 350 Pa Battery Room Extract Fan A and B P2 module Roof of Level 2 Battery Room 2 0.50 400 Pa Laboratory Extract Fan A and B P2 module Roof of Level 2 Laboratory 2 1.00 400 Pa

7.4 DUCT HEATERS The duct mounted electrical heaters shall be the following . Airflows and capacities shall be verified by VENDOR are to be verified at detail design.

EQUIPMENT DESCRIPTION

SERVED AREA LOCATION SERVED ZONE

Quantity AIR FLOW HEATING CAPACITY

No m3/s W HVAC Plant Room Heater P2 module HVAC room HVAC room 1 1.963 8 000 Battery Room Heater P2 module HVAC room Battery Room 1 0.500 2 800 Airlock Laboratory Heater P2 module Laboratory Airlock Laboratory 1 0.075 600 Laboratory Heater P2 module IT room Laboratory 1 1.000 7 000 Airlock IT room Heater P2 module IT room Airlock IT Room 1 0.075 600 IT room Heater P2 module IT room IT room 1 7.081 35 000 Airlock Electrical room Heater P2 module Electrical room Airlock Elec room 1 0.075 600 Electrical room Heater P2 module Electrical room Electrical room 1 7.529 40 000 Workshop Heater P2 module E&I Workshop E&I Workshop 1 0.564 4 200

8 HVAC SYSTEM DISTRIBUTION The HVAC Air Distribution systems consists of following list and characteristics of inlets, ducts selected as per international ducting standards, SMACNA.

Availability of the HVAC systems shall be increased by means of headers or cross-over ducts or pipes with the associated automatic equipment isolation to enable the automatic changeovers and the continuity of service. Any combination of unit shall be available, either due to piping or ducting headers.

8.1 HVAC BULKHEAD/DECK PENETRATIONS All bulkhead/deck internal and external duct penetrations shall be certified according to BV Class and SOLAS Rules requirements with reference to the Architectural Layout drawing AO-100-12-F020-199502 and shall be insulated according to the applicable fire rating.

Each penetration shall be provided of a certified fire damper, electrically actuated in case of indoor penetration and outdoor penetration. Fire and gas-tight dampers shall be controlled by the F&G system.


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8.2 DUCT DISTRIBUTION (SUPPLY, RECIRCULATION& EXHAUST) Distribution Ducts will be realized in galvanized steel. Only the Air supply Ducts will be provided of proper insulation. The considered air velocity is in accordance with data specified in HVAC Basis of Design.

Ducting located outdoors, located in an indoor untreated air space or carrying outdoor air or air containing corrosive contaminants shall be made of stainless steel 316L.

Ductwork shall be externally insulated by means of mineral wool with an aluminium foil to prevent air condensation and loss of thermal performance of the ductwork systems. An additional mechanical protection of the insulated ducts shall be required on outdoors ducts, on ducts exposed to shocks and on any duct installed at a level of less than 2m from the floor.

Each room shall have an individual temperature control. The use of variable airflow for the temperature control shall not be allowed.

In technical rooms and in particular in rooms such as Electrical Rooms, Instrument Rooms, Telecom Rooms, the air shall be supplied and distributed by means of the raised floor used as a air plenum and associated perforated floor grilles.

When the air is returned to the AHU, it shall be done by means of a return ductwork.

8.3 ARCHITECTURAL & LAYOUTS AO-100-12-F020-199502 Topside Technical Building Module P2 Architectural Layout.

9 SCOPE OF WORK Refer to documents AO-100-12-F020-199500 TOPSIDE TECHNICAL BUILDING - MODULE P2 SUPPLY SPECIFICATION and AO-100-12-F020-199501 TOPSIDE TECHNICAL BUILDING - MODULE P2 BATTERY LIMITS

1 INTRODUCTION1.1 KAOMBO PROJECT DESCRIPTION1.2 SCOPE OF THE DOCUMENT1.3 REFERENCE DOCUMENTS, DEFINITIONS AND ABBREVIATIONS1.4 CODES & STANDARDS1.5 PROJECT DOCUMENTS1.6 ORDER OF PRECEDENCE1.7 DEFINITIONS1.8 ACRONYMS1.9 UNITS & LANGUAGE

2 GENERAL REQUIREMENTS3 HVAC SYSTEM3.1 AIR CONDITIONED AREAS3.2 HVAC MAIN ARCHITECTURE3.2.1 Air locks3.2.2 Battery room3.2.3 Laboratory

3.3 NON-ESSENTIAL, ESSENTIAL, EMERGENCY SYSTEMS3.4 SPARING & REDUNDANCY CRITERIA/PHILOSOPHY3.5 CONDITIONED AIR SYSTEM3.6 PRESSURISATION CRITERIA3.7 PRESSURE MONITORING

4 POWER and CONTROL PANEL4.1 POWER SECTION4.2 CONTROL SECTION

115 SAFETY PHILOSOPHY5.1 INTEGRATION WITH FIRE & GAS SYSTEM5.2 FIREPROOFING1.11.15.3 OUTDOOR AIR INTAKES DESIGN

6 NON ESSENTIAL, ESSENTIAL, EMERGENCY HVAC SPARING7 HVAC EQUIPMENT7.1 CHILLED WATER UNITS WITH AIR COOLED DRY-COOLERS7.2 AHU AIR HANDLING UNITS7.3 EXTRACT FANS7.4 DUCT HEATERS

8 HVAC SYSTEM DISTRIBUTION1.11.11.11.11.11.11.11.11.11.11.18.1 HVAC BULKHEAD/DECK PENETRATIONS1.11.18.2 DUCT DISTRIBUTION (SUPPLY, RECIRCULATION& EXHAUST)8.3 ARCHITECTURAL & LAYOUTS

9 SCOPE OF WORK

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