Creating a World of Possibilities

Transcription

1 Creating a World of Possibilities 1

2 TABLE OF CONTENTS Who We Are: An Introduction to INNOVA Global Acoustics 101 MBLP RICE Facility Existing Noise Levels Acoustic Design Criteria Proposed Retrofit Project Examples Questions INNOVA-GL.COM

3 AREAS OF FOCUS Noise Management Air Emissions Control Gas Turbine & Reciprocating Engine Systems Turnkey Buildings Retrofit / Aftermarket WITH FOCUS COMES UNWAVERING COMMITMENT

4 NOISE MANAGEMENT SOLUTIONS ACOUSTICAL CONSULTING BARRIERS SILENCERS BUILDINGS & ENCLOSURES RETROFIT SOLUTIONS TURNKEY BUILDINGS

5 HOW WE MEASURE UP 5, ,000 Projects Countries Clients Site-Wide Sq. Meters Guarantees Shop Space

6 BALANCED DESIGN PROCESS Noise Criteria No Doubling of Safety Margins Data Acquisition Acoustic Modeling Met. Data Modeling Assumptions Cost Database Balanced Design Practical & Cost Effective Solutions Acoustical, Mechanical & Structural Design Guaranteed Compliance INNOVA-GL.COM

7 ACOUSTICS SOUND WAVES Sound is a series of pressure waves Amplitude Time or Distance Wavelength (m) Period (s)

8 FREQUENCY OF SOUND (Hz) Low Frequency High Frequency Octave Bands Low Mid High 31.5 Hz 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz 25 Hz 31.5 Hz 40 Hz 1/3 Octave Bands

9 AMPLITUDE - DECIBELS (db) Sound is a pressure fluctuation; Pascals (Pa) Pa 200 Pa SPL or L p in decibels = 20 log 10 (P/P ref )

10 ADDING DECIBELS L p = L p1 + Lp2 10 DECIBEL RULE: L p = 10 Log(10 Lp1/ Lp2/10 ) 80 db 83 db 90 db + 80 db = 90.4 db 90 db 86 db

11 HUMAN HEARING & FREQUENCY ISO Pure Tone Hearing Threshold (Median 18-30yrs old) Lp (db) Frequency (Hz)

12 FREQUENCY WEIGHTINGS, dba & dbc ISO Pure Tone Hearing Threshold (Median 18-30yrs old) Lp (db) A-Weighting Curve Frequency (Hz)

13 FREQUENCY WEIGHTINGS, dba & dbc ISO Pure Tone Hearing Threshold (Median 18-30yrs old) Lp (db) A-Weighting C-Weighting Curve Frequency (Hz)

14 FREQUENCY WEIGHTINGS, dba & dbc Sound Pressure Level (db) dba dbc Octave Band Center Frequency (Hz) Boiler Exhaust Steam Valve

15 SOUND POWER (db) vs SOUND PRESSURE (db) Power (i.e sound power level) Brightness (i.e sound pressure level) 100W Distance Sound pressure level, SPL or Lp: Sound power level, PWL or Lw: reference units (Pa) reference units (W)

16 MARQUETTE ENERGY CENTER INNOVA-GL.COM

17 NOISE IMPACT ASSESSMENT (NIA) Review of Existing Reports and Data On-Site Diagnostic Noise Survey Near-field measurements of all significant noise sources to quantify sound levels and frequency spectrum Residential Nighttime Noise Survey Short-term far-field measurements at three locations Acoustic Computer Modeling Cadna/A software from DataKustik Modeling results validated against actual measured sound levels Modeling shows contributions of individual noise sources (i.e building walls vs radiators vs engine exhausts etc.) to direct the mitigation design Reporting and Mitigation Recommendations

18 PROJECT SURROUNDING AREA PRE- & POST-CONSTRUCTION NOISE LEVELS 2001 Jenny Lane 39 / 45 dba 50 / 67 dbc Sound levels are average day time 1-hr L 90 levels 2422 Huron St 44 / 47 dba 54 / 68 dbc 1800 Ontario Ave 44 / 49 dba 54 / 71 dbc

19 NOISE REGULATIONS There are no noise regulations in the City of Marquette or State of Michigan governing the facility Original Project Design Criteria No more than 5 10 dba over baseline ambient sound levels dbc levels no more than 20 db over the dba levels 85 dba at 3-ft from all equipment expect the engines (OSHA limits)

20 DESIGN CRITERIA California limits power plants to a 5-10 dba increase over the existing ambient FERC limits inter-state facilities to 55 dba L dn (48.6 L eq ) at NSR s The state of Illinois has octave band specific limits, including 69 db at 31.5 Hz and 67 db at 63 Hz ASHRAE and ANSI S Criteria for Evaluating Room Noise (interior noise levels) Generally, annoyance is minimal when octave band sound pressure levels are less than 65 db at 16 Hz, 31.5 Hz and 63 Hz midband frequencies Low Frequency noise: dbc levels dba levels + 20 (Alberta, Canada)

21 ACOUSTIC MODELING & MITIGATION Balanced design to treat dominant noise sources Accounts for acoustic performance, cost and constructability

22 MAJOR LOW FREQUENCY NOISE CONTRIBUTORS 2001 Jenny Lane 1. Building Walls/Roof 2. Radiator Fans* 3. Exhaust Stacks 4. Building Ridge Vent 2422 Huron St 1. Building Walls/Roof 2. Building Ridge Vent 3. Exhaust Stacks 4. Radiator Fans 1800 Ontario Ave 1. Building Walls/Roof 2. Exhaust Stacks 3. Building Ridge Vent *At 500 Hz the radiator fans are the largest noise contributor at Jenny Lane

23 PROPOSED NOISE CONTROLS Retrofit Radiator with Inlet Silencer & Fan Deck Barrier. Building envelope Retrofit existing wall and roof system with new design, reusing existing materials where possible, upgrade overhead doors Building ridge vent Remove existing vent hood and replace with acoustically lined plenum and 90 duct elbows facing north Retrofit Building Envelope & Ridgetop Ventilation Radiator noise control Fan deck barrier comprising light gauge steel panels with internal absorptive lining facing the fans, and inlet silencing made with similar panels but arranged to maximize acoustic insertion loss and directivity attenuation.

24 BUILDING ENVELOPE WALLS/ROOF 22 EXISTING CLADDING WILL BE DEMOLISHED

25 WALL ASSEMBLY SOUND TRANSMISSION LOSS Existing Wall Assembly Wall Existing Wall Assembly NR Octave Band Center Frequencies (db) 31.5Hz 63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz STC ~35 Proposed Wall/Roof Assembly Wall Octave Band Center Frequencies (db) 31.5Hz 63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz STC Innova L60 Wall Assembly

26 CONSTRUCTION SEQUENCING Demolition of building envelope will progress from end wall to end of each wall. The intent will be to install the new materials as we go to minimize the acoustic impact to the community.

27 BUILDING RIDGE VENT DESIGN Baffle extension required New acoustically lined 90 elbows New acoustically lined plenum Existing ridge vent to be removed Existing dampers to be retained

28 RADIATOR NOISE CONTROL Pressure drop through silencers is less than 0.1 in-wg Panels to be supplied with galvanized finish

29 RADIATOR NOISE CONTROL

30 MITIGATED SOUND LEVELS Stage of Mitigation 2001 Jenny Lane 1800 Ontario Ave 2422 Huron St dba dbc dba dbc dba dbc Pre-Construction Current Walls/Roof Only Complete Mitigation

31 LA CHORRERA POWER PLANT, COLOMBIA Turnkey retrofit of 96 MW engine hall to meet World Bank noise standards Before: 62 dba at 250 m After: 45 dba with significant reduction in low frequency noise (16 to 63 Hz) Provided mitigation for the following: Radiator Coolers Building Ridge Ventilation Exhaust Combustion Exhaust Silencers Combustion Exhaust Ducts Building Roof and Walls

32 CELSIA BARRANQUILLA, COLOMBIA Reduced the noise level by up to 20 dba to meet the Ministry of Environment s nighttime criteria of 55 dba at 1.5 m from property line

33 SMUD CONSUMNES POWER PLANT Acoustic retrofit of 550 MW combined cycle facility to meet CEC criteria Before: 46 dba at 3,500 ft After: 40 dba at 3,500 ft Area is prone to temperature inversions Provided mitigation for the following: Steam turbine condenser Main transformers HRSG inlet transition Gas turbine inlet ducting

34 Octave band specific noise limits at multiple receptors and property lines Limits ranged from 45 dba to 70 dba ASTORIA ENERGY CENTER QUEENS, NY, USA Mitigation by INNOVA Complete turbine hall (steel, acoustic siding & roofing, HVAC) 105-ft tall acoustic barrier wall Acoustic louvers for ACC Miscellaneous metal buildings Sitewide noise guarantee

35 Numerous low frequency noise complaints (16 and 47 Hz) Building vibration issues 1 of 4 acoustical companies brought in to solve the problem INNOVA was the only company willing to guarantee a solution WOLF MINERALS (UK) Removal of existing cladding from process building and replacing with J-57 acoustic wall panel Installation of acoustic doors & enclosing conveyor openings.

36 AES RENCA PHASE 1 Engineering, supply and installation of the following areas and or components: Ultra low noise cooling tower fans and gear assembly Acoustic Shroud and barriers along north side of power train Silencers on CTG enclosure exhaust ventilation HRSG blowdown silencer Upgraded stack silencer NOISE LIMITS, RECEPTORS, BEFORE & AFTER NOISE LEVELS PHASE 2 Engineering, supply and acoustic solution for the following areas and or components: Installation of acoustic louvers around the cooling tower Cooling tower motor enclosures (under construction) Upper HRSG barrier (under construction) HRSG cladding extensions (under construction) Combustion inlet shroud (under construction) BWPF panels (under construction) ACOUSTIC SHROUD & BARRIERS ALONG NORTH SIDE OF POWER TRAIN HRSG Blowdown Silencer

37 HARNESS THE POWER OF INNOVATION