BS EN 15726-2011 Ventilation for buildings Air diffusion Measurements in the occupied zone of air-conditioned ventilated rooms to evaluate thermal and acoustic conditions《建筑物通风 空气扩.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 15726:2011Ventilation for buildings Air diffusion Measurementsin the occupied zone of air-conditioned/ventilated roomsto evaluate thermal andacoustic conditionsBS EN 15726:

2、2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 15726:2011.The UK participation in its preparation was entrusted to TechnicalCommittee RHE/2, Ventilation for buildings, heating and hot waterservices.A list of organizations represented on this committee can

3、beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 72608 8ICS 91.140.30Compliance with a British Standard cannot confer immunity fromlegal obligations.

4、This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2011.Amendments issued since publicationDate Text affectedBS EN 15726:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15726 October 2011 ICS 91.140.30 English Version Ventila

5、tion for buildings - Air diffusion - Measurements in the occupied zone of air-conditioned/ventilated rooms to evaluate thermal and acoustic conditions Systmes de ventilation pour les btiments - Diffusion dair - Mesurages dans la zone doccupation des pices avec conditionnement dair ou ventilation afi

6、n dvaluer les conditions thermiques et acoustiques Lftung von Gebuden - Luftverteilung - Messungen im Aufenthaltsbereich von klimatisierten/belfteten Rumen zur Bewertung der thermischen und akustischen Bedingungen This European Standard was approved by CEN on 4 September 2011. CEN members are bound

7、to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-

8、CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has

9、 the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Po

10、land, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by

11、 any means reserved worldwide for CEN national Members. Ref. No. EN 15726:2011: EBS EN 15726:2011EN 15726:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Test set up and conditions .54.1 General 54.2 Thermal loads .54.3 Furniture .54.4 Other conditions

12、 55 Methodology .65.1 Sampling in a room65.2 Measurements 65.2.1 General 65.2.2 Airflow rate .65.2.3 Velocities in the occupied zone .75.2.4 Temperature measurements 115.2.5 Sound pressure level . 116 Test report . 13Annex A (normative) Operational and environmental conditions 14Annex B (informative

13、) Typical Flow Pattern 15Annex C (informative) Intermittence and draught risk . 16Annex D (informative) Estimation of Air velocities in the occupied zone for different types of jets. 19Annex E (informative) Ventilation Efficiency Measurement. 20Bibliography . 21BS EN 15726:2011EN 15726:2011 (E) 3 Fo

14、reword This document (EN 15726:2011) has been prepared by Technical Committee CEN/TC 156 “Vetnilation for buildings”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the

15、 latest by April 2012, and conflicting national standards shall be withdrawn at the latest by April 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all

16、such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hunga

17、ry, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15726:2011EN 15726:2011 (E) 4 1 Scope This European Standard is applicable to measure some parameters of the

18、rmal and acoustic comfort (i.e. temperatures, air velocities) in a room with an air diffusion system. This European Standard can be used on site or in a lab for full-scale measurements. This European Standard applies to ventilation or air conditioning systems designed to maintain the comfort conditi

19、ons in buildings. It is not applicable in the case of systems for the control of industrial or other special process environments. NOTE In the latter case however, it may be referred to if the system technology is similar to that of the above mentioned ventilation and air conditioning systems. 2 Nor

20、mative references The following referenced 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 12599, Ventilation for build

21、ings Test procedures and measuring methods for handing over installed ventilation and air conditioning systems EN 13182 Ventilation for buildings Instrumentation requirements for air velocity measurements in ventilated spaces EN 13779, Ventilation for non-residential buildings Performance requiremen

22、ts for ventilation and room-conditioning systems prEN 16211, Ventilation for buildings Measurement of air flows on site methods EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and r

23、equirements (ISO 5167-1:2003) EN ISO 7726, Ergonomics of the thermal environment - Instruments for measuring physical quantities (ISO 7726:1998) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply: 3.1 reference point point where the measurements are

24、taken 3.2 mean velocity time average velocity over the whole measuring period 3.3 spatial average velocity average value of mean velocities taken in several points in the occupied zone BS EN 15726:2011EN 15726:2011 (E) 5 3.4 spatial maximum velocity maximum value of mean velocities taken in several

25、points in the occupied zone 3.5 test area usually areas designed for human occupancy and defined as a volume of air that is confined by specified horizontal and vertical planes NOTE 1 The vertical planes are usually parallel with the walls of the room. Usually there is also a limit placed on the hei

26、ght of the occupied zone. Thus, the occupied zone in a room is that space in which the occupants are normally located and where the requirements for the indoor environment shall be satisfied. Definitions are given in EN 13779:2007, 7.2. NOTE 2 Definition of the occupied zone is dependent on the geom

27、etry and the use of the room and should be specified case by case. Occupied area, EN 13779, modified 3.6 occupied zone (for laboratory purpose) portion of the treated space geometrically limited to be no closer than 0,15 m to all walls and within a height of 1,8 m above the floor 4 Test set up and c

28、onditions 4.1 General Before any test, the air diffusion system shall be checked accordance with EN 12599 so that its performance may be recorded. If the system performance does not meet the design criteria, correction shall be considered prior to the continuation of the test. If this is not possibl

29、e this shall be made clear in the report along with the assumptions made. 4.2 Thermal loads The room should be occupied according to its expected use or thermal loads have to be simulated. This should include all internal and external loads (occupants, lights, equipment). For on site measurements in

30、ternal and external loads should be reported (actual or simulated). 4.3 Furniture Furniture, curtains, absorbent surfaces, etc. can influence thermal or acoustic characteristics and should therefore be as representative as possible. 4.4 Other conditions Operational conditions of system running (VAV,

31、 fan speed, variable geometry) and environmental conditions do have influence on results and have to be reported according to Annex A. Conditions must be stabilised as much as possible during the test. For instance, supply temperature and reference point temperature should be checked regularly and s

32、hould not vary during the test by more than +/- 1 K. If this is not possible then the variation shall be recorded. BS EN 15726:2011EN 15726:2011 (E) 6 5 Methodology 5.1 Sampling in a room The reference point will be situated in the centre of the test area at a height of 1,1 m. Large areas may be div

33、ided into smaller parts, usually recommended to be less than or equal to 20 m2(EN 12599). In this case, each smaller part shall be treated as a test area There should be enough area to ensure a correct representation of the overall and local air diffusion. It is recommended that the test area takes

34、into account several diffusers jets in order to cover the effect of jet interaction. 5.2 Measurements 5.2.1 General Different levels of measurements can be used: Level 1: easy and quick check at the reference point(s). Level 2: more detailed check. Level 1 tests have to be performed first. For each

35、level, required measurements are indicated in Table 1. Table 1 Measurements required Level 1 Level 2 Airflow rate Smoke test or any other jet visualisation (5.2.2.1) Measurement (5.2.2.2) Velocities Measurement (5.2.3.2)Temperatures At reference point (5.2.4.2) Measurement (5.2.4.3) Sound pressure l

36、evel Overall dB(A) level at the reference point, or any other point where the highest sound level can be expected. (5.2.5.1) Octave band in order to recalculate any criteria (dB(A), dB(C), NR) asked (5.2.5.2) If required Ventilation Efficiency see Annex E 5.2.2 Airflow rate 5.2.2.1 Level 1: Jet visu

37、alisation Jet shall be visualised either by smoke test or by any other means The objective of the visualisation is: to determine the air flow pattern in the occupied zone; to detect possible high velocity areas; BS EN 15726:2011EN 15726:2011 (E) 7 to detect possible dead zones; Examples of common fl

38、ow patterns are given in Annex B. 5.2.2.2 Level 2: Airflow rate measurements Any method described either in prEN 16211, EN 12599 or EN ISO 5167-1 (lab measurements) shall be used for the determination of airflow rates. Both supply and extract airflow rates shall be determined if applicable. Results

39、have to be compared to designed values and, if not appropriate, ventilation system shall be adjusted before continuing measurements. 5.2.3 Velocities in the occupied zone 5.2.3.1 Level 1 No measurements are required. Flow visualisation as in 5.2.2. 5.2.3.2 Level 2: measurements The measurements of l

40、ow velocities within treated spaces shall be made with a measuring device in accordance with EN 13182. Air velocities should be measured in enough points in the occupied zone to determine the velocity field in the occupied zone. To this end, two or more planes of measurements shall be chosen accordi

41、ng to Figure 1 to Figure 5. One plane has to be perpendicular to the diffuser and centred on it. Test planes must be evenly distributed in the occupied zone and spaced with a distance between 0,6 m and 4 m. They are limited by the occupied zone and shall be representative of standard occupation of t

42、he room. BS EN 15726:2011BS EN 15726:2011EN 15726:2011 (E) 8 Key 1 Occupied zone Figure 1 Diffuser on the wall example of test planes All dimensions in metres Key 1 Occupied zone Figure 2 Diffuser on the ceiling example of test planes BS EN 15726:2011EN 15726:2011 (E)9 Key 1 OccupiedzoneFigure3 Diff

43、user(orfan coil) in windoworfloorposition example oftestplanesKey 1 OccupiedzoneFigure 4 Diffuser inacorner example oftestplanesBS EN 15726:2011EN 15726:2011 (E) 10 All dimensions in metres Key W Width H Height * If it is necessary Figure 5 Distribution of points in one vertical plane BS EN 15726:20

44、11EN 15726:2011 (E) 11 In each plane, horizontal test positions shall be evenly spaced resulting in a minimum of five positions per plane, with a maximum spacing of 2 m between them. It is recommended to have positions at the limit of the occupied zone. In each horizontal position, velocities shall

45、be measured at three heights from the floor. The lower and upper boundaries shall be specified in accordance with EN 13779 and additionally at 1,1 m (optional 0,6 m for seated persons). However, the lower measurement point shall not be lower than 0,04 m, If average velocity in the occupied zone is t

46、o be determined, a minimum of 15 measurement points shall be used to average the values in the occupied zone. At each point, velocity measurements shall be done according to EN 13182. Where jet visualisation has shown highest velocities, the number of points might be increased in this zone in order

47、to determine better the maximum air velocity in the occupied zone. These additional points should not be used for average velocity calculations. If some positions of the described grid cannot be measured due to furniture, obstacles etc., these points should be excluded from the measurements. In this

48、 case, the position of the test planes can be slightly adapted to fit better to the occupation. For diffusers situated in a corner, velocities should be measured as in Figure 4 in a 45 plane and, if necessary, also in the plane of maximum velocity (determined by visualisation) Annex C gives further

49、details on comfort analysis with regard to intermittence and draughts. 5.2.4 Temperature measurements 5.2.4.1 General Measurements of temperatures in room shall be made by means of resistance thermometers, thermocouples or other suitable instruments as long as they are calibrated with an accuracy better than 0,25 K. The global accuracy shall be better or equal to 0,5 K. 5.2.4.2 Level 1: at reference point The air temperature at the ref