prediction and management of emergent noise - cstb · prediction and management of emergent noise...

Jérôme DEFRANCE, Romain DUMOULIN

Prediction and management of emergent noise

in the tomorrow’s sustainable city

2

Context

• Triple crisis: energy / ecology / economy

• Health, comfort & social stakes

• CSTB research program on Sustainable Cities

• “Prediction and management of urban noise (2050)”

• Need of sound emission DB of building equipments

INTERNOISE 2010 │ June 13-16 │ Lisbon, Portugal | Emergent noise in the tomorrow’s sustainable city

3

Studied site

Cours Jean-Jaurès, Grenoble

The “straightest” Avenue

In Europe (8km)


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Studied site

Model

MITHRA


Leq Nuit : 62,2 dB(A)

Leq Soirée : 67,3 dB(A) Leq Petit Matin : 67,3 dB(A)

35

40

45

50

55

60

65

70

75

80

85

90

95

19:1

2:00

19:4

0:48

20:0

9:36

20:3

8:24

21:0

7:12

21:3

6:00

22:0

4:48

22:3

3:36

23:0

2:24

23:3

1:12

00:0

0:00

00:2

8:48

00:5

7:36

01:2

6:24

01:5

5:12

02:2

4:00

02:5

2:48

03:2

1:36

03:5

0:24

04:1

9:12

04:4

8:00

05:1

6:48

05:4

5:36

06:1

4:24

06:4

3:12

07:1

2:00

07:4

0:48

08:0

9:36

08:3

8:24

09:0

7:12

09:3

6:00

temps en hh:min:sec

LA

eq

1s

ec

en

dB

(A)

20 22 6 8 hours

Evening Night Earlymorning

5

Surface transport noise

Possible future scenarios

Scenarios

: HV

: LV

: electric LV “-4dB”

Description Speed Traffic distribution

Current 50 km/h : 9% (5%) : 91% : 0 %

Speed reduction 30 : 9% (5%) : 91% : 0 %

Electric LV with HV 50 : 9% : 0% : 100 %

Current. No HV 50 : 0% : 100% : 0 %

Scenario 2 50 : 0% : 0% : 100 %

Scenario 3 30 : 0% : 0% : 100 %

Joël LELONG, Roger MICHELET, “Passenger cars.

Power unit and tyre-road noise, driving behaviour:

what are the stakes ?” (2001)


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Noisy building equipments

• Heat pumps (avenue side)

• Heat pumps (backyard side)

• MEV (Mechanical Extract Ventilation) (roof)

• Wind turbines (roof)


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Noisy energy building equipments






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Heat pumps

Noise emission

Altherma Heat pump by Daikin

Values given by the CETIAT

(Centre technique des industries

aérauliques et thermiques)

Lw = 64 dB(A)


MITHRA

http://www.google.fr/imgres?imgurl=http://www.acheter-moins-cher.com/asp/gestion/media_prod/816344.jpg&imgrefurl=http://www.acheter-moins-cher.com/asp/produit100_rwt_p_840744.htm&usg=__uI3p3RXz52q3ndtjpo-UDqrLmYw=&h=243&w=250&sz=9&hl=fr&start=3&um=1&itbs=1&tbnid=1o9NpFs74c4g3M:&tbnh=108&tbnw=111&prev=/images%3Fq%3DPAC%2BAltherma%2BDaikin%26um%3D1%26hl%3Dfr%26tbs%3Disch:1

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25 heat pumps on Boulevard façade working 100% time

Results – Heat pumps

Emergences


10







11

110 heat pumps on Backyard façade working 100% time


Emergences


12

Emergences at the 3rd floor on backyardPumps on Backyard façade working 100% time


Emergences vs number of pumps


0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

0102030405060708090100110

Number of heat pumps installed on the backyard façade '

Day Early morning & even. Night

Night 30 km/h Night Scenario 2 Night Scenario 3

13







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MEV

Noise emission


Development of double-flow systems

Model CVEC 240 by Aldes (10 flats)

Model VEC 321B by Aldes (20 flats)

Lw = 63.6 dB(A)

Lw = 70.6 dB(A)

MITHRA

http://www.google.fr/imgres?imgurl=http://www.aldes.fr/pro2009/zoom/VECphoQ1.jpg&imgrefurl=http://www.aldes.fr/pro2009/html/ventilateurs-caissons-et-centrales-ventilateurs-en-caisson-d-extraction-c4-vec.htm&usg=__q-xKpTrNB7QkPMLHZjZqE4PhJ5E=&h=179&w=223&sz=36&hl=fr&start=6&itbs=1&tbnid=O_NQwNH-7V5WkM:&tbnh=86&tbnw=107&prev=/images%3Fq%3DCVEC%2B240%2BAldes%26hl%3Dfr%26gbv%3D2%26tbs%3Disch:1

15

1 MEV per flat working 100% time

Results – MEV

Emergences


16







17

Wind turbines

Noise emission

Quiet Revolution

Institute of Sound and Vibration Research Consulting,

Wind turbine noise measurements (2007)

Lw = 78,3 dB(A)


MITHRA

Report on the feasibility study WINEUR (2007)

18

Emergences for 3 Quiet Revolution wind turbines

Results - Wind turbines

Emergences


MITHRA

19

Emergences at the 5th floor on backyard side

Results - Wind turbines

Emergences


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Conclusions

• Large parametric study vs possible future traffic

scenarios and noisy energy building equipments

• Heat pumps:

• Max emergences < 3 dB(A) when located on boulevard façade

• Very high max emergences on backyard side when loc. on backayrd façade

• MEV, 1 per flat:

• Max emergences < 3 dB(A) on boulevard façade

• Max emergences from 2 to 12 dB(A) on backyard side

• 3 wind turbines, night:

• 5th floor backyard: Max emergences > 6 dB(A), up to 20 dB(A)

• Avenue: Max emergences < 2 dB(A)

INTERNOISE 2010 │ June 13-16 │ Emergent noise in the tomorrow’s sustainable city

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Perspectives

• Database of sound emissions and signals

• 3D sound restitution

• Bi-aural listening

• Perceptive approach


22

Thank you for your attention

Cours Jean-Jaurès,

Grenoble, 1916


prediction and management of emergent noise - cstb · prediction and management of emergent noise...

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