Comp

DOCUMENT DESCRIPTION: Control Narrative

UHDE SHEDDEN / QENOS

QENOS ALTONA REVAMP PROJECT

UHDE QENOS P-25835-00-K-001

DRESSER-RAND PROJECT 113668

MAIN EQPT TAG NO: C-353

VENDOR REF DOC NO: 663-767

INDEX

Page

1. INTRODUCTION 3

2. REFERENCE DOCUMENTATION 4

3. CONTROL SYSTEM OVERVIEW 5

3.1 UNIT CONTROL PANEL 5

3.2 CIRCUIT BREAKERS IN THE UCP 5

4. PRE-START 11

4.1 SEAL SEPARATION GAS SUPPLY 11

4.2 SEAL GAS SUPPLY 11

4.3 LUBE OIL SYSTEM 12

4.4 COMPRESSOR PURGE 15

5. OPERATION 15

5.1 UNIT PERMISSIVE TO START 16

5.2 UNIT START SEQUENCE INITIATION 17

5.3 MOTOR SPEED CONTROLLER 17

5.4 ANTI-SURGE CONTROL 19

5.5 LUBE OIL PUMP CHANGEOVER LOGIC 24

6. STOPPING SEQUENCES 24

6.1 NORMAL STOP 24

6.2 NON-VENTED SHUTDOWN 26

7. HUMAN MACHINE INTERFACE 27

8. ANALOG SIGNAL FAILURE 28

9. ALARMS AND SHUTDOWNS 28

9.1 ALARM CLASSIFICATIONS 28

9.2 ALARM PROCESSING 29

10. COMMUNICATION LINKS 30

10.1 Modbus Comms with DCS 30

10.2 Modbus Comms with Bently Nevada 3500 system 30

1. INTRODUCTION

This narrative describes the functional requirements for the Ethylene Refrigeration Compressor Train provided by Dresser-Rand on the Udhe Shedden, Qenos Project. This equipment is supplied to UHDE P-25835-00-K-001QENOS PTY. LTD, Austalia. The Ethylen Refrigeration Compressor Train consists of the following primary equipment:

• ABB Electric Motor

• Lufkin Speed Increasing Gear

• Dresser-Rand Compressor:

• Lube Oil System

• Seal Gas System

• Dresser-Rand Unit Control Panel

The control narrative is a guideline document that is to be used in the development of the...