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Slide1

Health, Safety & Environmental Approach to Ancillary Systems

© 2015 Universal AET. All Rights Reserved

Slide2

Agenda

Ancillary System Requirements Primary Goal - Maintain “up-time” / equipment availability Manage equipment noise Reduce heat rejection Achieve low level of emissions output Protect equipment Enable efficient operation

© 2015 Universal AET. All Rights Reserved

2

Slide3

Compression Station

© 2015 Universal AET. All Rights Reserved

3

Exhaust Noise

&

Emissions

High Pressure Blowdown Silencer

Ventilation Noise

&

Filtration

Air Intake Noise & Equipment Protection

Piping & Valve

Flow

Noise

Slide4

System Design Approach

A better solution can be achieved when all HSE requirements are considered Design each system (intake, exhaust and auxiliaries) with the total station goal in mind Integrate functional requirements together to avoid unintended consequencesExample: External thermal insulation reduces the fatigue life of the exhaust system

© 2015 Universal AET. All Rights Reserved

4

Slide5

Noise & Emissions

Noise is limited by: Laws, ordinances, regulations, standards and guidelines Contracts and specifications And the existing environmental level Frequently, only a +3 to +5 dB allowable increase to the existing environment sound levels Exhaust emissions are limited by: Laws, ordinances, regulations, standards and guidelines Contracts and specifications Local regulations due to existing local air quality issues

© 2015 Universal AET. All Rights Reserved

5

Slide6

Some Typical A-wtd Sound Levels

© 2015 Universal AET. All Rights Reserved

6

Slide7

Community Noise

World Heath Organization (WHO):

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7

Specific Environment Critical Health Effects TAL, dB Time Base (hrs)Outdoor Residential Areas Serious annoyance, daytime and evening 5516Moderate annoyance, daytime and evening 5016Sleep disturbance, windows open 458Speech Intelligibility 55School playground General annoyance 55

*TAL – Time based A-weighted sound level

Slide8

Community Noise

World Bank Group70 dB is the limit (at the property line) as it has been demonstrated that when a new facility is built people will live adjacent to or near the facility Exposure to continuous 70 dB sound level usually does not cause hearing loss

© 2015 Universal AET. All Rights Reserved

8

Receptor Classification

Daytime:

07:00-22:00

Nighttime

22:00-07:00

Residential, Institutional, Educational

55

45

Industrial, Commercial

70

70

Slide9

Noise Control

The Noise Control Model: This simple model is used to determine the best noise control or mitigation approach; that is, which of the three elements is the best choice to control or reduce the noise.

© 2015 Universal AET. All Rights Reserved

9

Noise Source

Noise Path

Noise

Received

Slide10

Sound Propagation Model

© 2015 Universal AET. All Rights Reserved

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Slide11

Exhaust Noise Control

Silencer Design Reduce sound level out the stack Reduce sound through the walls Durability and performance over all flow rates & temperatures

© 2015 Universal AET. All Rights Reserved

11

Slide12

Exhaust Noise Control

Internal silencer design

© 2015 Universal AET. All Rights Reserved

12

Perf steel

Wire screen

Needlemat

Acoustic pack

Completed baffle sections

Slide13

Baffle Construction

© 2015 Universal AET. All Rights Reserved

13

Hidden perf sheet seams to prevent flow induced liner

F

ailure

. 24”/610mm panel width reduces pack

settling

All edges are captured within liner frame

Slide14

Exhaust Emissions

Restriction and sizing optimized Flow distribution is critical System thermal design for catalyst Integrated monitor system

© 2015 Universal AET. All Rights Reserved

14

Typical emission reduction up to 90% CO & 80% VOC

Catalyst integrated into overall exhaust system

Slide15

Exhaust Emissions

© 2015 Universal AET. All Rights Reserved

15

Catalyst elements installed with serviceable mounting system

Catalyst housing with flow distribution plate shown

Slide16

Exhaust Emissions

Flow through catalyst is analyzed to insure proper distribution

System configuration (elbows and transitions) can greatly impact flow Distribution is critical to catalyst performance

© 2015 Universal AET. All Rights Reserved

16

Flow distribution at inlet of catalyst housing

Slide17

Exhaust Emissions

Emissions Technology We work with several catalyst suppliers SCR partner if NOx reduction is required.

© 2015 Universal AET. All Rights Reserved

17

Slide18

Intake Noise Control

Silencer Design Reduce sound level out the filter house Silencer must be “clean” as it is directly upstream of turbine or engine High frequency noise requires critical silencer design

© 2015 Universal AET. All Rights Reserved

18

Slide19

Intake Filtration

Alliance with key supply partners Provide filtration technology Improved turbine protection Integrated with silencing, lower pressure drop and smaller size

© 2015 Universal AET. All Rights Reserved

19

Slide20

Intake Filtration

Filtration Options

Barrier filter panels or pockets

Cylindrical Pulse clean filters Intake chillers, heated louvers, mist & water separators

© 2015 Universal AET. All Rights Reserved

20

Slide21

Equipment Availability

Ancillary System Design Minimize thermal effects in exhaust systems Protect acoustical materials to maximize life Long filter life / service interval for intake systemsMinimize pressure drop in systems to improve turbine efficiency

© 2015 Universal AET. All Rights Reserved

21

Slide22

Thermal Management

“Lined” Exhaust System Thermal Design

© 2015 Universal AET. All Rights Reserved

22

150mm insulation

Outer structural shell is kept cool, ~60C to minimize thermal stress

Thermally isolated connection system

F

loating” liner panels

Slide23

Thermal Management

Temperature across outer surface is 120C max,

typical temp is 40C

Stresses are well below 75% limit for long life

© 2015 Universal AET. All Rights Reserved

23

Slide24

Heat Shielding

Heat shields to reduce heat impact on surround areaRemovable to allow service access to catalyst elements

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24

Slide25

Pressure Drop – System Performance

© 2015 Universal AET. All Rights Reserved

25

Intake filter house & silencer

Turbine

Exhaust Silencer

Slide26

Enclosures & Barriers

Enclosures

can provide both a noise control method and personnel safety Acoustic performance level is flexible ATEX compliant options

© 2015 Universal AET. All Rights Reserved

26

Slide27

Enclosures & Barriers

Barrier walls are another option when noise source is directional Provides isolation for additional equipment Piping yard Separators

© 2015 Universal AET. All Rights Reserved

27

Slide28

Auxiliary Equipment

High pressure blowdown silencers Provide a controlled release of gas during maintenance & system changesProvide a safety relief in over-pressure conditions Can be designed for a wide range of pressures & flows

© 2015 Universal AET. All Rights Reserved

28

Slide29

Structural Design

Environmental

conditions

can vary greatly by location – proper design is key to safety.Critical inputs: Expected wind speeds Seismic activity Wave motion for off-shore platforms or FPSOs

© 2015 Universal AET. All Rights Reserved

29

Slide30

Structural Design

Analytical Methods Tools are used extensively to predict stress levels, resonant frequencies, bending moments, etc. Design adherence to UBC, IBC or other specialized codes

© 2015 Universal AET. All Rights Reserved

30

Slide31

Summary

A Full System view: Functional requirements (acoustic, aerodynamic, thermal and dimensional) Environmental inputs (wind, seismic, blast, etc) Design Life requirements (years, thermal cycles, etc) Inputs enable an integrated solution to best meet all requirements

© 2015 Universal AET. All Rights Reserved

31

Slide32

© 2015 Universal AET. All Rights Reserved

Thank You

Slide33

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