1、BRITISH STANDARD BS EN 12589:2001 Ventilation for buildings Air terminal units Aerodynamic testing and rating of constant and variable rate terminal units The European Standard EN 12589:2001 has the status of a British Standard ICS 91.140.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY C
2、OPYRIGHT LAWBS EN 12589:2001 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 16 November 2001 BSI 16 November 2001 ISBN 0 580 38616 3 National
3、foreword This British Standard is the official English language version of EN 12589:2001. The UK participation in its preparation was entrusted to Technical Committee RHE/2, Air distribution and air diffusion, which has the responsibility to: A list of organizations represented on this committee can
4、 be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the
5、“Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from l
6、egal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pa
7、ges This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 32, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN
8、 STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12589 September 2001 ICS 91.140.30 English version Ventilation for buildings Air terminal units Aerodynamic testing and rating of constant and variable rate terminal units Ventilation des btiments Units terminales Essais arodynamiques et valuation des uni
9、ts terminales dbit constant et variable Lftung von Gebuden Luftdurchlasseinheiten Aerodynamische Prfung und Bewertung von Luftdurchlasseinheiten mit konstantem und variablem Luftvolumenstrom This European Standard was approved by CEN on 18 August 2001. CEN members are bound to comply with the CEN/CE
10、NELEC 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 Management Centre or to any C
11、EN 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 Management Centre has the same status as the official versions. CEN me
12、mbers are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISA
13、TION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12589:2001 EEN 12589:2001 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative referenc
14、es 4 3 Terms, definitions and symbols.6 4 Instrumentation7 5 Tests for flow rate control characteristics 8 6 Tests to determine induced air flow rate.20 7 Test to determine temperature mixing 22 8 Tests to determine leakage rates.27 Annex A (normative) Determination of static pressure 32EN 12589:200
15、1 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 156, Ventilation 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 t
16、he latest by March 2002, and conflicting national standards shall be withdrawn at the latest by March 2002. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republ
17、ic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.EN 12589:2001 (E) 4 1 Scope This European Standard specifies methods for the aerodynamic testing and rating of constant and variable fl
18、ow rate terminal units suitable for use with air distribution systems. The terminal units considered are: single and dual duct; induction; fan assisted induction (parallel and series); single duct with integral diffuser. The tests for each type of unit are summarized in Figure 1. The tests in this s
19、tandard are designed to determine fully the aerodynamic performance of terminal units and provide a basis for the comparison of the suitability of such assemblies when correctly installed in an air distribution system. 2 Normative references This European Standard incorporated by dated or undated re
20、ference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references the subsequent amendments to or revisions of any of these publications apply to this European Standard only when inc
21、orporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). CR 12792, Ventilation for buildings Symbols, units and terminology. ISO 5167-1, Measurement of fluid flow by means of pressure differential devices Part
22、1: Orifice plates, nozzles and venturic tubes inserted in circular cross-section conduits running full. ISO 3966, Measurement of fluid flow in closed conduits Velocity area method using Pitot static tubes. ISO 5221, Air distribution and air diffusion Rules to methods of measuring air flow rate in an
23、 air handling duct.EN 12589:2001 (E) 5 Single duct Dual duct Induction Fan assisted Induction Terminal Series type Fan assisted Induction Terminal Parallel type Terminal with integral diffuser SD DD IU IFS IFP TD 5 5.3 78 8.3 8.5 5.4 6 Flow rate control characteristic Press. Compensation min. Operat
24、. Press Influence inlet cond. INDUCED FLOW RATE All units All units All units All units All units Unit SD, DD Unit IU, IFS, IFP Temperature mixing Damper Casing Leakage rates Unit TD Figure 1 Test units and test requirementsEN 12589:2001 (E) 6 3 Terms, definitions and symbols 3.1 For the purposes of
25、 this standard, the terms and definitions given in CR 12792 apply. 3.2 The symbols and the suffixes used in this standard are shown in Tables 1 and 2 respectively. Table 1 Symbols used for testing air terminal units Symbol Quantity Units A c Internal cross-sectional area of duct m 2 d e Equivalent d
26、iameter / A c 4 m p Absolute static pressure Pa p a Atmospheric pressure Pa p d Velocity pressure Pa p r Stagnation (or absolute total pressure) Pa p s Static gauge pressure (p - p a ) Pa p t Total pressure (p r- p a ) Pa p Flow meter pressure difference Pa p t Total pressure difference Pa q v Volum
27、e rate of air flow at the flow meter m 3 .s -1or l.s -1 q vL Leakage volume rate of air flow m 3 .s -1or l.s -1 Q vLBA Leakage volume rate of air flow across a valve per unit cross-sectional area m 3 .s -1 .m -2 or l.s -1 .m -2 Q vLCA Leakage volume rate of air flow through casing per unit cross-sec
28、tional area m 3 .s -1 .m -2 or l.s -1 .m -2 v Velocity m.s -1 Air density kg.m -3 Celsius temperature C S Position of valve or induction damper setting % or n Fan speed control setting V or position Table 2 Suffixes used with the symbols in Table 1 0 recommended value (usually by the manufacturer) 1
29、 inlet of the unit under test 2 outlet of the unit under test 3 induction port(s) of the unit under test i outlet air temperature c cold side of the unit under test w warm side of the unit under test u measuring point upstream of the flow meter D measuring point upstream of the discharge flow meter
30、sn nett surface area of the unit under test ca casing of the unit under test va valve of the unit under testEN 12589:2001 (E) 7 4 Instrumentation 4.1 Air flow rate measurement 4.1.1 The air flow rate shall be measured using instruments in accordance with ISO 5167-1. 4.1.2 Air flow meters shall have
31、the ranges and accuracies shown in Table 3. Table 3 Ranges and accuracies of air flow meters Range m 3 s -1 Measurement error % 0,007 0,07 0,07 7,00 5 2,5 NOTE Flow meters may be calibrated in situ by means of pitot static tube traverse techniques described in ISO 3966. 4.1.3 Leakage air flow meters
32、 shall have the ranges and accuracies shown in Table 4. Table 4 Ranges and accuracies of leakage air flow meters Range m 3 s -1 Measurement error % 0,018 0.018 0,9 x 10 -3m 3 .s -1 5 % NOTE Alternatively, other devices such as variable-area, flow-rate meters or integrating air flow meters of the pos
33、itive displacement type may be used if calibrated in accordance with 4.1.3. 4.1.4 Flow meters shall be checked at intervals, as appropriate, but not exceeding 12 months. This check may take the form of one of the following: a) a dimensional check for all flow meters not requiring calibration; b) a c
34、heck calibration over their full range using the original method employed for initial calibration or meters calibrated in situ; c) a check against a flow meter which meets the flow meter specification in accordance with ISO 5221.EN 12589:2001 (E) 8 4.2 Pressure measurement 4.2.1 Pressure in the duct
35、 shall be measured by means of a liquid-filled calibrated manometer, or any other device conforming to 4.2.2. 4.2.2 The maximum scale or display interval shall not be greater than the characteristics listed for the accompanying range of manometers, shown in Table 5. Table 5 Maximum scale or display
36、interval Range Pa Maximum scale interval Pa 25 25 to 250 250 to 500 500 1,0 2,5 5,0 25,0 4.2.3 For air flow rate measurements, the minimum pressure differential shall be: a) 25 Pa with an inclined tube manometer or micro-manometer; b) 500 Pa with a vertical tube manometer. 4.2.4 The calibration stan
37、dards shall be: a) for instruments with the range up to 25 Pa, a micro-manometer accurate to 0,5 Pa; b) for instruments with the range of 25 Pa to 500 Pa, a manometer accurate to 2,6 Pa (hook gauge or micro-manometer); c) for instruments with the range of 500 Pa and upwards, a manometer accurate to
38、25 Pa (vertical manometer). 4.3 Temperature measurement Measurement of temperature shall be by means of mercury-in-glass thermometers, resistance thermometers or thermo-couples. Instruments shall be graduated to give readings in intervals not greater than 0,5 K and calibrated to an accuracy of 0,25
39、K. 5 Tests for flow rate control characteristics 5.1 Principle To determine the changes in primary air flow rate resulting either from variations in the pressure differential between the inlet duct(s) and the outlet duct(s) or chamber or upstream pressure whichever is appropriate. Also, to determine
40、 the pressure differential between upstream and downstream of the terminal unit, and additionally the minimum pressure difference which is necessary to reach the performance of the terminal unit within the specified operating tolerances (minimum operating pressure difference).EN 12589:2001 (E) 9 5.2
41、 Test measurements The following parameters shall be measured during the tests: a) p s1 inlet duct static gauge pressure. b) p s2 static gauge pressure in the chamber into which the outlet duct discharges (p s2= 0 if free outlet conditions are used). c) 1 air temperature at the inlet to the unit und
42、er test. d) p the flow meter pressure difference (or the appropriate parameter that relates to the air flow q v1 ). e) p su the static gauge pressure immediately upstream of the flow meter. f) u the air temperature immediately upstream of the flow meter. g) p a the atmospheric pressure at the beginn
43、ing and end of the tests. 5.3 Pressure compensation and minimum operating pressure difference( p tmin ) 5.3.1 Units without induction SD, DD NOTE This test is required for pressure independent units only. 5.3.1.1 Test installation A typical test installation for type SD units is shown in Figure 2. P
44、erformance of static pressure measurement device is described in annex A. A typical test installation for type DD units is shown in Figure 3. All the test equipment described in clause 4 should be installed for both supply ducts. Discharge temperature measurement equipment should be installed if mix
45、ing efficiency is to be determined. 5.3.1.2 Test procedure 5.3.1.2.1 With the supply fan running, set the flow rate controller to its maximum setting. Increase the pressure differential between the inlet(s) and the outlet(s) to the manufacturers recommended maximum operating pressure differential an
46、d record the test measurements in accordance with 5.2. 5.3.1.2.2 Decrease the pressure differential in stages, approximately to the values given in Table 6 until the flow rate has reached a value equal to or less than 50 % of the value obtained in the pressure differential range where the flow rate
47、is seen to be approximately constant. At each stage record the test measurements in accordance with 5.2. When making the adjustments to pressure, if the pressure falls below the next prescribed value, increase it to the value at the start of the test, and then slowly decrease it to the specified val
48、ue before a further measurement is taken.EN 12589:2001 (E) 10 1 2 3 4 5 6 7 8 3 d e1 1,5 d e1 d e1 d e2 P s1 P s2 d e2 t t u 1 p Key 1 Air flow 5 Total length of unit 2 Flow rate measuring device which conforms to ISO 5167-1 6 Unit under test 3 Flow straughtener which conforms to ISO 5167-1 7 Chambe
49、r such as reverberation room 4 This length to be straight and its cross section uniform and equal to that of the inlet spigot 8 Peizometric ring NOTE Dual duct unit: Each duct to be measured seperately Figure 2 Typical test installation to determine flow rate control characteristics for units SD; DD and damper leakage characteristics for all unitsEN 12589:2001 (E) 11 u w u c p c 1w 1c p w p s1w 1,5 d e1 0,5 d e2 1d e2 3 d e1 d e1w d e2 d e1c p s1c 25 - 25 - - 100
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