ALSTOM Rovinari Romania_Report

Date: 2011-08-01

Our reference:

IS-US5-MUC/fc

Document:

ALSTOM Rovinari

Romania_Report.docx

Report-No.: F11/298-LG

The document consists of

15 pages

Page 1 of 15

Excerpts from this document may

only be reproduced and used for

advertising purposes with the

express written approval of

TÜV SÜD Industrie Service GmbH.

The test results refer exclusively

to the units under test.

Headquarters: Munich Trade Register Munich HRB 96 869 VAT ID No. DE129484218 Information pursuant to Section 2(1) DL-InfoV (Germany) at www.tuev-sued.com/imprint

Supervisory Board: Karsten Xander (Chairman) Board of Management: Ferdinand Neuwieser (CEO), Dr. Ulrich Klotz, Thomas Kainz

Phone: +49 89 5791-2387 Fax: +49 89 5791-1174 www.tuev-sued.de/is

TÜV SÜD Industrie Service GmbH

Niederlassung München Abteilung Umwelt Service

Westendstrasse 199 80686 Munich Germany

Measurement Report Performance Test ROVINARI –Turn-key WFGD Unit 3

Project: WFGD desulphurization plant - CE Rovinari

Operating company: S.C. Complexul Energetic Rovinari S.A.

Location:

Client: ALSTOM Power Italia S.p.A. Viale Edison 59 I-20099 Sesto San Giovanni

Inspection scope: Noise Emissions

Order-no.: 1690815

Report-no.: F11/298-LG

Expert Noise/Vibration: Friedrich Conz Dipl.-Ing. (FH)

Phon: 089/5791-3385

Fax: 089/5791-1174

E-Mail: [email protected]

Page 2 of 15 Reference/Date: IS-US-MUC / 2011-08-01 Document: ALSTOM Rovinari Romania_Report.docx Report-No.: F11/298-LG

Content:

1 Noise Measurement Performance ........................................................................ 3

1.1 Date of measurement performance ...................................................................... 3

1.2 Meteorological conditions..................................................................................... 3

1.3 Measurement equipment ....................................................................................... 3

1.4 Performance guarantee ......................................................................................... 3

1.5 Measurement procedure and standards .............................................................. 5

2 Results .................................................................................................................... 6

3 Assessment of the results .................................................................................... 7

4 Photo documentation ............................................................................................ 9


1 Noise Measurement Performance

1.1 Date of measurement performance

Tuesday 19.07.2011, from approx. 5:00 to 7:30 o’clock PM

1.2 Meteorological conditions

Temperature approx. 34 °C

Wind speed less than 0,5 m/s outside building

No precipitation, humidity approx. 30 – 50 %

Atmospheric pressure approx. 1004 hPa

No strong temperature inversion

1.3 Measurement equipment

The measurements to determine the sound pressure level were performed with the following

measuring instrument:

Real Time Sound Analyzer from the manufacturer Norsonic type 140, Serial-No. 1403028 that

meets the requirements of the standards DIN EN 61672-1 and DIN EN 61672-2, accuracy class 1

and has an official verification at the time of the performance test.

The entire measuring system was checked at the beginning and at the end of the measurement

procedure with an external sound level calibrator from the manufacturer Norsonic Type 1251 Se-

rial No. (set point 113.9 dB re. 1 kHz).

The results of the calibration tests are given in the following table:

Table 1: Results of the calibration tests

date set point actual level beginning actual level end

2011.07.19 113,9 dB 113,8 dB 113,8 dB

The measurements were carried out with the time rating fast (125 ms) and the frequency weight-

ing A. The minimum duration of each measurement was 20 - 30 seconds for temporal non-

transient sound sources. For temporal transient sound sources the measurement duration has

been adapted adequately.

1.4 Performance guarantee

In the Document number: API1100000PRMAN0462 Rev. A the following specifications are men-

tioned:

Quote:

“ …

3.2 Performance Guarantees

The performance guarantees are given in the CER Rovinari Power Plant Air Reduction

Equipment Contract Agreement Document (j) The Contractor's Proposal [Rovinari Power

Plant – Technical Proposal, Envelope III.6 - Performance Guarantees, par. 6.3.3 – Noise


level], and, valid throughout the load range reported in the section 6.2 of the mentioned

document during the test period, are consistent with the following value:

Noise level inside premises works ≤ 85 dB(A) at 1 m distance at nominal load

Noise level outdoors ≤ 65 dB(A) at 1 m distance

The noise limits may be exceeded for some equipment during transient operation (e.g.

Safety valves, circuit breakers, pulse cleaning valves, etc.)..

… “

and

“ …

3.4 Standards and References

As defined by national and international standards the surface sound pressure level will

be delivered from measured values after applying corrections for the background noise

and the influence of reflecting sound.

Therefore an appropriate standard, which defines measurement procedures to determine

the surface sound pressure level and which is characterizing the noise emission of a

specified source, has to be selected to prove compliance with the contractual data.

The Noise level Performance Test is managed according to the following standards me-

thods and references:

Parameter Methodology

Noise Level ISO 3746:1995

Acoustics -- Determination of sound power levels of noise sources using sound pressure -- Survey method using an enveloping measurement surface over a reflecting plane

This standard specifies a survey procedure to determine the A-weighted surface sound

pressure level emitted by noise sources. No limitations concerning the test environment,

size of source or character of noise is specified in this standard.

Alternatively, equivalent ANSI standards may be considered and used if agreed between

API and CER.

… “

unquote.

Comment to the standard EN ISO 3746:

The sound pressure level strongly depends on the surrounding of the sound source. Several

standards e.g. DIN EN ISO 3746 or DIN EN ISO 3744 describe a procedure how to calculate the

sound power level on the basis of sound pressure levels and how to perform these sound pres-

sure level measurements. In contrast to the sound pressure level, the sound power level is inde-

pendent from the surroundings. Generally the sound pressure level is measured under free field


conditions or under (semi) laboratory conditions to calculate the sound power level of a sound

source using the averaged sound pressure level (surface sound pressure level). The value of the

sound power level describes the emission of a sound source, is independent of the surrounding

conditions and is e.g. important to compare machines of several manufacturers among each

other.

According to the standards, the single sound pressure levels must be measured along a precisely

defined imaginary surface (cubic or hemispheric surface) and averaged energetically (= surface

sound pressure level). The value of the surface sound pressure level is commonly determined in

test rooms, under free field conditions or under semi laboratory conditions where you can suffi-

ciently quantify the influence of the surrounding conditions.

But the situation at the plant is almost inapplicable to the above-mentioned standard. Thus there

is no applicable standard to measure single components on a multisource plant under operating

conditions.

1.5 Measurement procedure and standards

The Noise level Performance Test has been performed on the basis of the standard DIN EN ISO

3746, Acoustics – Determination of sound power levels of noise sources using sound pressure –

Survey method using an enveloping measurement surface over a reflecting plane (ISO

3746:1995, including Cor 1:1995)

The applied measurement equipment (see chapter 1.3) fulfils the requirements of the above men-

tioned standard DIN EN ISO 3746. The further statements of the standard DIN EN ISO 3746 are

not applicable to the plant situation in this particular case, because of the following reasons:

Corrections for the background noise cannot be applied because there is no possibility to

turn of the measured equipment without interrupt of the whole operating process.

Corrections for the influence of reflecting sound cannot be applied because of the afore-

said reason and because of the fact that an exact calculation of the influence is just possi-

ble for rooms with almost rectangular geometries and almost consistent absorbing sur-

faces.

The impact of other sound sources nearby cannot be calculated or estimated because this

equipment cannot be turned off without interrupting of the whole WFDG-process.

The measuring procedure was defined in commonly agreement by the representatives of the in-

volved parties (SAEM, S.C.C, ALSTOM and TÜV-SÜD) and the measurements were performed

in presence of the aforesaid parties.

The measurements were performed at a 1,0 m distance of the equipment and if applicable at a

height of 1,6 m above floor (approx. human ear level).


2 Results

The results of the measurements are shown in the following table. Significant exceeding of the

guarantee values is coloured deep red and marginal exceeding is marked light red.

Table 2: Results of the measurements

WFGD desulphurization plant - CE Rovinari

No. Equipment Pcs.

In-/outside building

Guarantee [dB(A)]

Measured LAeq [dB(A)] Comment

1 Air Compressor (without air dryer inside) 1 inside 85 70,5

2 Air Compressor Building (outside) 1 outside 85 N/A no relevant noise emissions

3 Air Receiver Tank 1 outside 85 N/A no relevant noise emissions

4.1 Oxidation Air Blower 2 inside 85 83,5

4.2 Oxidation Air Blower inside Noise Enclosure --- --- 113,2 for infomation only

5 Hydrocyclone 2 inside 85 83,0

6 Hydrocyclone Feed Pump 2 inside 85 83,1

7 Mist Eliminator Wash Pump 2 outside 85 82,3 influence of background noise (ID Fan, etc.)

8 Process Water Pump 2 outside 85 85,7 influence of background noise (ID Fan, etc.)

9.1 Absorber Recycle Pump 5 inside 85 85,2

9.2 Absorber Recycle Pump inside 85 84,8

9.3 Absorber Recycle Pump inside 85 86,0 infuence of Recycle Pump nearby

9.4 Absorber Recycle Pump inside 85 N/A not in operation

9.5 Absorber Recycle Pump inside 85 N/A not in operation

10.1 Reaction Tank Agitator 5 inside 85 85,0

10.2 Reaction Tank Agitator inside 85 84,5

10.3 Reaction Tank Agitator inside 85 83,0

10.4 Reaction Tank Agitator inside 85 86,2 influence of ID Fan

10.5 Reaction Tank Agitator inside 85 88,1 influence of ID Fan

11 Absorber Area Sump Pump 2 inside 85 N/A no relevant noise emissions

12 Absorber Area Sump Agitator 1 inside 85 N/A no relevant noise emissions

13 Underflow Pump 2 inside 85 83,4

14 Overflow Pump 2 inside 85 84,1

15 Limestone Slurry Feed Pump 2 inside 85 N/A no relevant noise emissions

16 Limestone Conveyor 1 inside 85 83,7

17.1 Limestone Unloading Blower 3 inside 85 89,3 missing insulation of piping-system and insufficient sealing of the openings for ducts

17.2 Limestone Unloading Blower inside 85 94,0 missing insulation of piping-system and insufficient sealing of the openings for ducts

18 Dedusting System 1 outside 85 N/A no relevant noise emissions

19 Reagent Preparation Area Sump 1 inside 85 N/A no relevant noise emissions

20 ID Fan 1 outside 85 100,7

21.1 Site-Border every 50 m outside 65 62,7

21.2 Site-Border every 50 m outside 65 65,6

21.3 Site Border every 50 m outside 65 66,6







22 Underflow Tank Agitator 1 inside 85 83,6

23 Hydrocyclone Diverter 2 inside 85 83,3

LAeq = A-weighted equivalent sound pressure level

3 Assessment of the results

As shown and red marked in Table 2: Results of the measurements, some of noise emitting

sources exceed the guaranteed limit of 85 dB(A) at a distance of 1m from the equipment. The

exceeding which is detected at the particular equipment is discussed as follows:

Pos. No. 17.1 and Pos. No. 17.2 Limestone Unloading Blower:

Although there is some influence of reflections caused by the walls and the ceiling of the building

the guaranteed level of 85 dB(A) cannot be achieved, although the blowers are installed inside a

noise enclosure. The noise level in the area around the blowers is mainly caused by the piping

system of the blower outside the noise enclosure and the insufficient sealing of the pipe penetra-

tion of the enclosure (see picture no. 15 and no. 16). With a proper insulation of the piping system

and a correct sealing of the pipe penetration at the noise enclosure, a sound pressure level of

85 dB(A) in 1 m distance might be achieved.

Pos. No. 20 ID Fan:

There is no doubt, that the noise emissions of the duct between ID Fan and Stack are responsible

for the whole background noise in the area near the ID Fan. Even at the site-boarder the influ-

ence of these emissions are traceable.

For the appraisement of the expert the best way to minimize the emissions of the duct between ID

Fan and Stack is to construct a noise enclosure around the duct. With a sound insulation around

the duct the emissions could hardly minimized up to a level of 85 dB(A).

Marginal exceeding was detected at the following equipment:

Pos. No. 9.3 Absorber Recycle Pump:

The marginal exceeding can be explained by the influence of the other Absorber Recycle Pumps

and the other equipment nearby. The levels higher than 85 dB(A) were mainly detected at the

side between the two running Recycle Pumps. For one single Recycle Pump in operation the

sound pressure level in 1 m distance can be estimated to be lower than 85 dB(A).

Pos. No. 10.4 and Pos. No. 10.5 Reaction Tank Agitators:

These two Agitators are situated near to the facade in direction to the ID Fan. Considering the

fact, that there are missing gates, remaining gaps and openings at the south-western area of the

absorber building, the guaranteed level of 85 dB(A) will be achieved at this both agitators as well,

when these openings are closed and when there is a noise enclosure around the ID Fan duct.

Pos. No. 21 Site-border:

The exceeding at the south-western border of the site could be traceable leaded back to the influ-

ence of the ID Fan duct. When the noise enclosure around the duct is installed, no exceeding at


the south-western site-border will be expected. For the appraisement of the noise expert, the

noise level will fall far below 65 dB(A) after applying the suggested noise reduction measures.

Prüflaboratorium Geräusche und

Schwingungen

Messstelle nach §§ 26/28 BImSchG

DAkkS Akkreditierung nach DIN EN ISO/IEC 17025 Expert Noise/Vibration

Peter Thaler Friedrich Conz


4 Photo documentation

Pic.01: Pos. No. 4.1 Oxidation Air Blower Pic.02: Pos. No. 5 Hydrocyclone

Pic.03: Pos. No. 23 Hydrocyclone Diverter Pic.04: Pos. No. 22 Underflow Tank Agitator


Pic.05: Pos. No. 14.1 Overflow Pump

Pic.06: Pos. No. 6.1 Hydrocyclone Feed Pump


Pic.07: Pos. No. 10.1 to 10.5 Reaction Tank Agitators (example)

Pic.08: Pos. No. 13.1 Underflow Pump


Pic.09: Pos. No.9.1 to 9.3 Absorber Recycle Pumps (example)

Pic.10: Pos. No. 7.1 Mist Eliminator Wash Pump


Pic.11: Pos. No. 8.1 Process Water Pump

Pic.12: Pos. No. 20 ID Fan


Pic.13: Pos. No. 16 Limestone Conveyor

Pic.14: Pos. No. 17.1 Limestone Unloading Blower


Pic.15: Pos. No17.1 Limestone Unloading Blower pipe penetration

Pic.16: Pos. No. 17.1 Limestone Unloading Blower piping system

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