DIN EN 15726-2011 Ventilation for buildings - Air diffusion - Measurements in the occupied zone of air-conditioned ventilated rooms to evaluate thermal and acoustic conditions Germ.pdf

1、December 2011 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I

2、CS 91.140.30!$y$K“1860140www.din.deDDIN EN 15726Ventilation for buildings Air diffusion Measurements in the occupied zone of air-conditioned/ventilated roomsto evaluate thermal and acoustic conditionsEnglish translation of DIN EN 15726:2011-12Lftung von Gebuden Luftverteilung Messungen im Aufenthalt

3、sbereich von klimatisierten/belfteten Rumen zur Bewertungder thermischen und akustischen BedingungenEnglische bersetzung von DIN EN 15726:2011-12Systmes de ventilation pour les btiments Diffusion dair Mesurages dans la zone doccupation des pices avec conditionnement dair ouventilation afin dvaluer l

4、es conditions thermiques et acoustiquesTraduction anglaise de DIN EN 15726:2011-12www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 23 pages12.11DIN EN 15726:2012-01 2 A comma is used as the decimal marker. National foreword This standard

5、 has been prepared by Technical Committee CEN/TC 156 “Ventilation for buildings” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Heiz- und Raumluft-technik (Heating and Ventilation Technology Standards Committee), Working Committee

6、NA 041-02-52 AA Komponenten (SpA CEN/TC 156/WG 3 und WG 4). EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15726 October 2011 ICS 91.140.30 English Version Ventilation for buildings - Air diffusion - Measurements in the occupied zone of air-conditioned/ventilated rooms to evaluate thermal and

7、acoustic conditions Systmes de ventilation pour les btiments - Diffusion dair - Mesurages dans la zone doccupation des pices avec conditionnement dair ou ventilation afin dvaluer les conditions thermiques et acoustiques Lftung von Gebuden - Luftverteilung - Messungen im Aufenthaltsbereich von klimat

8、isierten/belfteten Rumen zur Bewertung der thermischen und akustischen Bedingungen This European Standard was approved by CEN on 4 September 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of

9、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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German).

10、 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 the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cy

11、prus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Management Centre: Avenue Marnix 17, B-

12、1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15726:2011: EEUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG EN 15726:2011 (E) 2 Contents Page Foreword 31 Scop

13、e 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 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 Temper

14、ature measurements 115.2.5 Sound pressure level . 116 Test report . 13Annex A (normative) Operational and environmental conditions 14Annex B (informative) Typical Flow Pattern 15Annex C (informative) Intermittence and draught risk . 16Annex D (informative) Estimation of Air velocities in the occupie

15、d zone for different types of jets. 19Annex E (informative) Ventilation Efficiency Measurement. 20Bibliography . 21DIN EN 15726:2012-01 EN 15726:2011 (E) 3 Foreword This document (EN 15726:2011) has been prepared by Technical Committee CEN/TC 156 “Vetnilation for buildings”, the secretariat of which

16、 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 latest by April 2012, and conflicting national standards shall be withdrawn at the latest by April 2012. Attention is drawn to the possibilit

17、y 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 such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bou

18、nd to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

19、Sweden, Switzerland and the United Kingdom. DIN EN 15726:2012-01 EN 15726:2011 (E) 4 1 Scope This European Standard is applicable to measure some parameters of thermal and acoustic comfort (i.e. temperatures, air velocities) in a room with an air diffusion system. This European Standard can be used

20、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 conditions in buildings. It is not applicable in the case of systems for the control of industrial or other special process environments. NOTE I

21、n 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 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only t

22、he edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12599, Ventilation for buildings Test procedures and measuring methods for handing over installed ventilation and air conditioning systems EN 13182 Ventilation for b

23、uildings Instrumentation requirements for air velocity measurements in ventilated spaces EN 13779, Ventilation for non-residential buildings Performance requirements for ventilation and room-conditioning systems prEN 16211, Ventilation for buildings Measurement of air flows on site methods EN ISO 51

24、67-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirements (ISO 5167-1:2003) EN ISO 7726, Ergonomics of the thermal environment - Instruments for measuring physical quantities (ISO 772

25、6:1998) 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 taken 3.2 mean velocity time average velocity over the whole measuring period 3.3 spatial average velocity average value of mean velociti

26、es taken in several points in the occupied zone DIN EN 15726:2012-01 EN 15726:2011 (E) 5 3.4 spatial maximum velocity maximum value of mean velocities taken in several 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

27、 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 height of the occupied zone. Thus, the occupied zone in a room is that space in which the occupants are normally located and where the

28、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 geometry and the use of the room and should be specified case by case. Occupied area, EN 13779, modified 3.6 occupied zone (for laborato

29、ry 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 conditions 4.1 General Before any test, the air diffusion system shall be checked accordance with EN 12599 so that its performance ma

30、y 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 possible this shall be made clear in the report along with the assumptions made. 4.2 Thermal loads The room should be occupied according to

31、 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 internal and external loads should be reported (actual or simulated). 4.3 Furniture Furniture, curtains, absorbent surfaces, etc. can

32、influence thermal or acoustic characteristics and should therefore be as representative as possible. 4.4 Other conditions Operational conditions of system running (VAV, fan speed, variable geometry) and environmental conditions do have influence on results and have to be reported according to Annex

33、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 should not vary during the test by more than +/- 1 K. If this is not possible then the variation shall be recorded. DIN EN 15726:2012

34、-01 EN 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 divided into smaller parts, usually recommended to be less than or equal to 20 m2(EN 12599). In this case, each smaller part shall

35、 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 into account several diffusers jets in order to cover the effect of jet interaction. 5.2 Measurements 5.2.1 General Different l

36、evels 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 level, required measurements are indicated in Table 1. Table 1 Measurements required Level 1 Level 2 Airflow rate Smoke test or

37、 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 level Overall dB(A) level at the reference point, or any other point where the highest sound level can be expected. (5.2.5.1) Oc

38、tave 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 visualisation Jet shall be visualised either by smoke test or by any other means The objective of the visualisation is: to determin

39、e the air flow pattern in the occupied zone; to detect possible high velocity areas; DIN EN 15726:2012-01 EN 15726:2011 (E) 7 to detect possible dead zones; Examples of common flow patterns are given in Annex B. 5.2.2.2 Level 2: Airflow rate measurements Any method described either in prEN 16211, EN

40、 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 have to be compared to designed values and, if not appropriate, ventilation system shall be adjusted before continuing mea

41、surements. 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 low velocities within treated spaces shall be made with a measuring device in accordance with EN 13182. Air velocities shou

42、ld 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 according to Figure 1 to Figure 5. One plane has to be perpendicular to the diffuser and centred on it. Test planes must be evenl

43、y 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 the room. DIN EN 15726:2012-01 EN 15726:2011 (E) 8 Key 1 Occupied zone Figure 1 Diffuser on the wall example of test planes

44、 All dimensions in metres Key 1 Occupied zone Figure 2 Diffuser on the ceiling example of test planes D IN E N 157 26: 2012 - 01 EN 15726:2011 (E) 9 Key 1 Occupied zone Figure 3 Diffuser (or fan coil) in window or floor position example of test planes Key 1 Occupied zone Figure 4 Diffuser in a corne

45、r example of test planes D IN E N 157 26: 2012 -0 1EN 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 DIN EN 15726:2012-01 EN 15726:2011 (E) 11 In each plane, horizontal test positions shall be evenly spaced r

46、esulting 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 be measured at three heights from the floor. The lower and upper boundaries shall be spe

47、cified 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 to be determined, a minimum of 15 measurement points shall be used to average the values

48、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 to determine better the maximum air velocity in the occupied zone. These additional poin

49、ts 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 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, al