1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58emissions from heat generators Part 2: Flue gas noise emissions at the outlet of the heat generator
2、The European Standard EN 15036-2:2006 has the status of a British StandardICS 17.140.20; 91.140.10Heating boilers Test regulations for airborne noise BRITISH STANDARDBS EN 15036-2:2006BS EN 15036-2:2006This British Standard was published under the authority of the Standards Policy and Strategy Commi
3、ttee on 31 October 2006 BSI 2006ISBN 0 580 49400 4Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published
4、 by BSI. It is the UK implementation of EN 15036-2:2006. The UK participation in its preparation was entrusted to Technical Committee RHE/10, Heating boilers.A list of organizations represented on RHE/10 can be obtained on request to its secretary.This publication does not purport to include all the
5、 necessary provisions of a EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15036-2September 2006ICS 17.140.20; 91.140.10English VersionHeating boilers - Test regulations for airborne noise emissionsfrom heat generators - Part 2: Flue gas noise emissions at theoutlet of the heat generatorChaudires
6、de chauffage - Rgles dessais des missionsde bruit arien des gnrateurs de chaleur - Partie 2:missions de bruit de chemine la sortie du gnrateurHeizkessel - Prfverfahren fr Luftschallemissionen vonWrmeerzeugern - Teil 2: Abgasgeruschemissionen amAusgang des WrmeerzeugersThis European Standard was appr
7、oved by CEN on 14 August 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalst
8、andards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to
9、 the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norw
10、ay, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and
11、 by any means reservedworldwide for CEN national Members.Ref. No. EN 15036-2:2006: EEN 15036-2:2006 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Set-up and measurement equipment.7 5 Test arrangements.12 6 Test procedure.13 7 Calculatio
12、ns13 8 Test report 14 Annex A (informative) Guidelines for the design and construction of an anechoic termination .16 Annex B (informative) Testing of anechoic terminations19 Annex C (normative) Procedure for calculating the A-weighted sound power level from the octave band or one-third-octave band
13、sound power levels.21 Annex D (informative) Uncertainty of the measurement process 22 Bibliography 23 EN 15036-2:2006 (E) 3 Foreword This document (EN 15036-2:2006) has been prepared by Technical Committee CEN/TC 57 “Central heating boilers”, the secretariat of which is held by DIN. This European St
14、andard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2007, and conflicting national standards shall be withdrawn at the latest by March 2007. According to the CEN/CENELEC Internal Regulations, the national stand
15、ards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Ro
16、mania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 15036-2:2006 (E) 4 Introduction Establishing the A-weighted sound pressure level and its spectral distribution in the flue gas path of a heat generator is significant for estimating the noise emission expected in the vicini
17、ty and for the rating of flue gas silencers. This European Standard describes a procedure for measuring sound pressure levels in the flue gas path of heat generators derived from EN ISO 5136:2003. The sound power radiated from a heat generator through its flue gas path depends to some extent on the
18、design of the flue gas system (changes in direction and cross-section, installations, and natural frequencies) as described by the acoustic impedance. Any measurement procedure therefore requires the measurement duct to be specified unambiguously if comparable readings are to be obtained. In the pro
19、cedure described here, the measurement duct has a circular cross-section and is fitted with a low-reflection end-piece as described in annex A. The sound power measured under these conditions can be regarded as representative for all practical applications. The level of measurement uncertainty is de
20、scribed by the standard deviation that is to be expected if the same readings are taken in different laboratories. EN 15036-2:2006 (E) 5 1 Scope This European Standard applies to heat generators according to EN 15036-1, which are connected to chimneys/ducts which discharge combustion products via a
21、duct into open air. The data measured according to this European Standard will probably be different from the noise radiated from the end of the chimney. Readings from forced-draught burners complying with EN 267 or EN 676 are only applicable in practice if they have been taken in conjunction with a
22、 boiler. Noise emitted into chimneys/ducts by heat generators operating independently of indoor air can also be measured in accordance with this European Standard. Boilers supplied with combined air inlet and exhaust terminal configuration where ducts are within an external wall can be measured acco
23、rding to one of the test methods detailed in EN 15036-1. This European Standard describes the objective procedure for determining sound power levels LW,at the outlet of a heat generator that is emitting broad-band, narrow-band, or tonal continuous sound. This European Standard is applicable to boile
24、rs designed to be connected to a chimney or flue duct with a duct size greater than or equal to 0,06 m and whose mean flue gas flow at the microphone head is less than 5 m/s. This European Standard only applies for test purposes under laboratory conditions. 2 Normative references The following refer
25、enced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 437, Test gases Test pressures Appliance categories EN 15036-1, H
26、eating boilers Test regulations for airborne noise emissions from heat generators Part 1: Airborne noise emissions from heat generators CEN/TR 1749, European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types) EN 60942, Electroacou
27、stics Sound calibrators (IEC 60942:2003) EN 61260, Electroacoustics Octave band and fractional-octave-band filters (IEC 61260:1995) EN 61672-1, Electroacoustics Sound level meters Part 1: Specifications (IEC 61672-1:2002 EN ISO 266, Acoustics Preferred frequencies (ISO 266 1997) EN 15036-2:2006 (E)
28、6 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 duct 3.1.1 test duct duct in which a heat generators sound power is measured NOTE The test duct has an anechoic termination. 3.1.2 intermediate duct duct fitted to the intake side and
29、 to the discharge side of the heat generator to ensure desired flow conditions NOTE The intermediate duct connects to the test duct, if necessary by a transition section. 3.2 sound pressure level LpdBppLp202lg10= where p is the mean square root value of the sound pressure and the reference sound pre
30、ssure p0is equal to 20 Pa NOTE 1 The width of a restricted frequency band should be indicated, for example, octave-band sound pressure level, one-third-octave-band sound pressure level. NOTE 2 Lp1, L p2and L p3are sound pressure levels at each of the three measurement positions in the test duct. Sou
31、nd pressure levels may also be obtained from a continuous circumferential traverse (see 5.2). pmL is the spatially averaged sound pressure level obtained from averaging over three measurements positions in the test duct. It may also be obtained from a continuous circumferential traverse (see 5.2). p
32、L is the spatially averaged sound pressure level at the measurement plane, corrected for the combined free-field response C (see Table 1 and 8.1) NOTE 3 The sound pressure level is expressed in decibels (dB). EN ISO 5136:2003, definition 3.5 EN 15036-2:2006 (E) 7 3.3 sound power level LW dBPPLW0lg10
33、= where P is the sound power and the reference sound power P0is equal to 1 pW NOTE 1 The width of a restricted frequency band should be indicated, for example, octave-band sound power level, one-third-octave-band sound power level. NOTE 2 The sound power level is expressed in decibels (dB). EN ISO 5
34、136:2003, definition 3.6 4 Set-up and measurement equipment 4.1 General For the tests the boiler shall be installed and fired with fuels in accordance with the appliance manufacturers instructions. For a gas boiler the test gas shall be in accordance with the appliance category and EN 437. The fuel
35、used for the test shall be stated in the test report. According to CEN/TR 1749, the test arrangement for type B and type C boilers with non-concentric ducts, shall consist of the boiler under test, an intermediate duct, the test duct with anechoic termination and the instrumentation (see Figure 1 an
36、d Figure 2). According to CEN/TR 1749, the test arrangement for type C boilers with concentric ducts (C1 and C3), shall consist of the boiler under test to which is applied the pressure drop corresponding to the maximum length of flue declared by the manufacturer, its test duct with anechoic termina
37、tion and the instrumentation. For type C boilers which can only be installed with short flue ducts e. g. 300 mm which are supplied with the boiler by the appliance manufacturer shall be measured using one of the test methods according to EN 15036-1. EN 15036-2:2006 (E) 8 Key 1 boiler d0diameter of t
38、est duct, in m (at least 0,06 m) 2 intermediate duct (if required) d1diameter of flue gas outlet from the boiler, in m 3 transitions duct (if required) l1length of intermediate duct, in m 4 test duct (Measurement level) l2length of transitions, in m 5 anechoic termination (see annex A, for details)
39、l3length of test duct, in m 6 pressure outlet point lm3distance of the microphone position, in m. 7 microphone Figure 1 Test configuration for rear outlet EN 15036-2:2006 (E) 9 Key 1 boiler d0diameter of test duct, in m (at least 0,06 m) 2 intermediate duct (if required) d1diameter of intermediate d
40、uct, in m 3 transitions duct (if required) dHdiameter of flue gas outlet from the boiler, in m 4 test duct (measurement level) l0length of bent, in m (max 0,25 m) 5 anechoic termination (see annex A for details) l1length of intermediate duct, in m 6 pressure outlet point l2length of transitions, in
41、m 7 microphone l3length of test duct, in m 8 bent l4length of flue gas outlet, in m (max 1 m) 9 flue gas outlet lm3distance of the microphone position, in m Figure 2 Test configuration for top outlet All connections between the heat generator and the duct shall be rigid unless a vibration-isolated c
42、oupling is an integral component part of the heat generator. A mounting for a microphone shall be provided at the point on the measurement duct identified for this purpose in Figure 1 and Figure 2. The pressure at the outlet of the boiler should be set at the required level given by the manufacturer
43、; any deviation should be recorded. If the flue gas outlet of the boiler is vertically mounted, a bend shall be installed directly behind this outlet. The test duct shall be connected to this bend. The ratio of the bends radius to the diameter of the duct shall be as big as possible, in order to min
44、imise the bends influence on the transmitted noise. 4.2 Specification of the duct 4.2.1 Design of ducts and transitions The duct shall be straight, coaxial with the outlet of the heat generator, and of a constant circular cross-section all along its length. The duct and transitions shall be made eit
45、her of steel or of a material with an equivalent area-mass and rigidity, in order to ensure a smooth, reverberate internal surface so that no vibrations can occur that could affect the readings. EN 15036-2:2006 (E) 10 4.2.2 Duct lengths and distances between them The duct lengths and the distances b
46、etween them shall be selected in accordance with the specifications shown in Figure 1, Figure 2 and Table 1. Table 1 Duct lengths Duct Length m Intermediate duct l1= d1Length of transitions l2= see 4.2.3 Test duct l3 4 d0or 1 m (whichever is the greater) Distance of the microphone position lm3= 0,5
47、l3NOTE To achieve greater accuracy at lower frequencies (i.e. below 50 Hz) the length of test duct l3 should be increased to 4 m or 6 x d0diameter of the test duct. The duct cross-sectional areas are shown in Table 2 where “S” represents the cross-sectional area in m2of the flue gas outlet at the he
48、at generator. Table 2 Duct cross-sectional areas Cross-sectional area Duct Minimum Maximum Intermediate duct 0,95 S 1,07 S Test duct 0,7 S 2,1 S 4.2.3 Transition ducts The test or terminating duct shall be coupled directly to the intermediate duct, or where there is a change of cross-sectional area,
49、 indirectly by means of a transition duct. The diameter ratio of the transition shall lie within the limits specified in Table 2. For acoustic reasons the length of the transition shall be such that the minimum length of transition l2minconforms to equation (1): 10min2slSSll (1) where: l01 m; Sllarger area; Sssmaller area. EN 15036-2:2006 (E) 11 For aerodynamic reasons the outlet transition shall have an opening angle not exceeding 15 and in many cases, this will
