BS EN 15116-2008 Ventilation in buildings - Chilled beams - Testing and rating of nactive chilled beams《建筑物的通风 冷却梁 有源冷却梁的测试和评定》.pdf

1、BS EN 15116:2008ICS 91.140.30,NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDVentilation inbuildings Chilledbeams Testing andrating of active chilledbeamsThis British Standardwas published underthe authority of theStandards Policy andStrategy Committee on 30Nov

2、ember 2008 BSI 2008ISBN 978 0 580 59457 1Amendments/corrigenda issued since publicationDate CommentsBS EN 15116:2008National forewordThis British Standard is the UK implementation of EN 15116:2008.The UK participation in its preparation was entrusted to TechnicalCommittee RHE/2, Ventilation for buil

3、dings, heating and hot waterservices.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British St

4、andard cannot confer immunityfrom legal obligations.BS EN 15116:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15116April 2008ICS 91.140.30English VersionVentilation in buildings - Chilled beams - Testing and rating ofactive chilled beamsVentilation des btiments - Poutres froides - Essai etva

5、luation des poutres froides activesLftung von Gebuden - Khlbalken - Prfung undBerechnung von aktiven KhlbalkenThis European Standard was approved by CEN on 28 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europe

6、anStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, F

7、rench, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus,

8、 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUR

9、OPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15116:2008: EBS EN 15116:2008EN 15116:2008 (E) 2 Contents Page Foreword .3

10、 1 Scope 4 2 Normative references4 3 Terms, definitions and symbols.4 3.1 Terms and definitions .4 3.2 Symbols and units.7 4 Test method .9 4.1 Principle9 4.1.1 General .9 4.1.2 The internal heat supply method .9 4.1.3 The external heat supply method 9 4.2 Test room .9 4.3 Instrumentation10 4.3.1 Th

11、e internal heat supply method .10 4.3.2 The external heat supply method 10 4.3.3 Other instrumentation.10 4.4 Test procedure.11 4.4.1 Test set up11 4.4.2 Steady state condition 11 4.4.3 Measurements12 4.4.4 Expression of results 13 5 Uncertainty .14 6 Test report 14 Bibliography20 BS EN 15116:2008EN

12、 15116:2008 (E) 3 Foreword This document (EN 15116:2008) 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

13、 endorsement, at the latest by October 2008, and conflicting national standards shall be withdrawn at the latest by October 2008. 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

14、 identifying any or all 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany

15、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 15116:2008EN 15116:2008 (E) 4 1 Scope This European Standard specifies methods for measuring

16、the cooling capacity of chilled beams with forced air flow. The evaluation of aerodynamic air performance is not part of this standard. It will be dealt with in the future in a new standard entitled “Air terminal devices - Aerodynamic testing and rating for mixed flow applications for non isothermal

17、 testing - Cold jets“. The purpose of the standard is to give comparable and repeatable product data. The test method applies to all types of convector cooling systems with forced air supply using any medium as energy transport medium. This standard only applies to situations where induced air only

18、passes through the heat exchanger (primary air does not pass through the heat exchanger). NOTE The result is valid only for the specified test set up. For other conditions, (i.e. different positions of heat loads, inactive ceiling elements around the test objects), the producer should give guidance

19、based on full scale tests. This standard refers to water as the main cooling medium, with the possibility of additional cooling from the primary air. Wherever water is written, any other cooling medium can also be used in the test. 2 Normative references The following referenced documents are indisp

20、ensable 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 12792:2003, Ventilation for buildings - Symbols, terminology and graphical symbols EN 14240

21、:2004, Ventilation for buildings Chilled ceilings Testing and rating 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 requirements (ISO 5167-1:2003) EN ISO 7726, Ergonomics of th

22、e thermal environment - Instruments for measuring physical quantities (ISO 7726:1998) ISO 5221, Air distribution and air diffusion - Rules to methods of measuring air flow rate in an air handling duct 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the t

23、erms and definitions given in EN 12792:2003 and the following apply. 3.1.1 active chilled beam convector with integrated air supply where the induced air only passes through the cooling coil(s). The cooling medium in the coil is water NOTE For the purpose of this standard primary air does not pass t

24、hrough the cooling coil. 3.1.2 test room room in which the test object is mounted BS EN 15116:2008EN 15116:2008 (E) 5 3.1.3 primary air flow rate (qp) airflow supplied to the test object through a duct from outside of the test room or with primary air fan and ducting inside the test room 3.1.4 induc

25、ed air flow rate (qi) secondary airflow from the test room induced into the test object by the primary air 3.1.5 exhaust air flow rate (qe) airflow discharged from the test room or return air if the primary air fan is located in the test room. The exhaust air flow rate is the same as the primary air

26、 flow rate 3.1.6 primary air pressure drop (pa) pressure drop across induction nozzle plus discharge loss 3.1.7 cooling water flow rate (qw) the average of the measured water flow rates during the test period 3.1.8 nominal cooling water flow rate (qwN) flow rate that gives a cooling water temperatur

27、e rise (w2 w1) of 2 K 0,2 K at nominal temperature difference (N= 8 K) and at nominal air flow rate 3.1.9 water side pressure drop (pw) internal pressure drop across coil plus beam internal pipes 3.1.10 room air temperature (a) average of air temperatures measured with radiation shielded sensors in

28、1,1 m height in positions out of the main air current from the test object 3.1.11 globe temperature (g) temperature measured with a temperature sensor placed in the centre of the globe. The globe is placed in 1,1 m height in a position out of the main air current from the test object 3.1.12 referenc

29、e air temperature (r) reference air temperature equals average air temperature of the induced air on the inlet side of the cooling coil(s), measured with radiation shielded sensors in three positions in the induced air opening, two centrally at the quarter points and one at the central point of the

30、opening 3.1.13 cooling water inlet temperature (w1) average of the measured water temperature into the test object during the test period 3.1.14 cooling water outlet temperature (w2) average of the measured water temperature out of the test object during the test period 3.1.15 mean cooling water tem

31、perature (w) mean value of the cooling water inlet and outlet temperatures, w=0,5(w1 + w2) BS EN 15116:2008EN 15116:2008 (E) 6 3.1.16 primary air temperature (p) average of the primary air temperature during the test period 3.1.17 temperature difference () difference between reference air temperatur

32、e and mean cooling water temperature, =r - w3.1.18 nominal temperature difference (N) nominal temperature difference (8 K) between the reference air temperature and the mean cooling water temperature (N=r - w=8 K) 3.1.19 primary air temperature difference (p) temperature difference between the refer

33、ence air temperature and the primary air temperature 3.1.20 specific heat capacity (cp) heat required to raise the temperature of a unit mass of the cooling medium by 1K NOTE cpfor water = 4,187 kJkg-1K-1and cpfor air = 1,005 kJkg-1K-1, at 15 C. 3.1.21 cooling length (L) active length of the cooling

34、 section 3.1.22 total length (Lt) total installed length of the cooling section including casing 3.1.23 water side cooling capacity (Pw) cooling capacity of the test object calculated from the measured cooling water flow rate and the cooling water temperature rise Pw=cpqm(w2 - w1) 3.1.24 primary air

35、 cooling capacity (Pa) cooling capacity calculated from the primary air flow rate and primary air temperature difference Pa= cpqp p(r - p) 3.1.25 specific cooling capacity per unit length (PL) water side cooling capacity divided by the (active) cooling section length 3.1.26 specific cooling capacity

36、 (PK) cooling capacity divided by the difference between reference air temperature and mean cooling water temperature, =r - wraised to the exponent m i.e. PK= Pw/mBS EN 15116:2008EN 15116:2008 (E) 7 3.1.27 nominal cooling capacity (PN) or nominal specific cooling capacity (PLN) water side cooling ca

37、pacity calculated from the curve of best fit for the nominal cooling water flow rate at nominal temperature difference (N= 8 K) and at nominal air flow rate 3.2 Symbols and units For the purposes of this document the symbols given in EN 12792:2003 apply together with those given in Table 1. BS EN 15

38、116:2008EN 15116:2008 (E) 8 Table 1 Symbols and units Symbol Quantity UnitA Constant in PK= AqpnAt Test room floor area m2k1Constant in Pw= k1 mk2Constant in Pw= k2 qpnn Exponent used in PK= Aqpnm Exponent used in PK = Pw/mL Cooling length (active length) m LtTotal length of a chilled beam, includin

39、g casing m cpSpecific heat capacity kJkg-1K-1h Height from floor to underside of active chilled beam m P Total cooling capacity P = Pw+ PaW PLSpecific cooling capacity per unit active length W m-1PNNominal cooling capacity (at N = 8 K) W PLNNominal specific cooling capacity per unit active length (a

40、t N = 8 K) Wm-1PKSpecific cooling capacity (PK = Pw/m) W K-mPaPrimary air cooling capacity W PwWater side cooling capacity W PtSpecific cooling capacity per unit floor area Wm-2PsHeating capacity of dummies W PTRHeat transfer test room periphery W qwCooling medium flow rate l(litre)s-1qwNNominal coo

41、ling water flow rate l(litre)s-1pwWater pressure drop kPa qmCooling medium mass flow rate (qm= wqw) kgs-1qpNNominal primary air flow rate l(litre)s-1qpPrimary air flow rate l(litre)s-1qiInduced air flow rate l(litre)s-1qeExhaust air flow rate (if appropriate) l(litre)s-1paPrimary air pressure drop P

42、a aRoom air temperature C eRoom exhaust air temperature (if appropriate) C gGlobe temperature C rReference air temperature C swSurface wall temperature C pPrimary air temperature C w1Cooling water inlet temperature C w2Cooling water outlet temperature C wMean cooling water temperature C pDensity of

43、primary air at pkgm-3wDensity of cooling medium at wkgl-1(litre) Temperature difference K reference air temperature-water mean NNominal temperature difference (=8K) K p Temperature difference reference air temperature -primary air temperature K BS EN 15116:2008EN 15116:2008 (E) 9 4 Test method 4.1 P

44、rinciple 4.1.1 General The water side cooling capacity of the test object shall be determined from measurements of the cooling water flow rate and cooling water temperature rise under steady state condition. The water side cooling capacity shall be presented as a function of the primary air flow rat

45、e and the temperature difference between the reference air temperature and the mean cooling water temperature. The measurements shall be performed in an airtight room, to the requirements of 4.2, with controlled temperatures on the inside surfaces. Two alternative methods are allowed: 4.1.2 The inte

46、rnal heat supply method The perimeter of the room shall be insulated and have negligible heat flow through it. The perimeters shall be insulated in such a way that during the test the average heat flow through these surfaces is less than 0,40 Wm-2. To balance the cooling capacity of the test object,

47、 heating is supplied in the test room by means of a number of electric heated person simulators, dummies, as described in 4.3 of EN 14240:2004. The dummies are placed on the floor inside the test room. To get reproducible results the dummies shall be placed in determined positions as described in 4.

48、4.1 of EN 14240:2004. For location of beam(s) relative to the dummies, see 4.4.1 of this standard. NOTE This method uses the same test room and heating supply to the room as specified in EN 14240 for testing and rating of chilled ceilings. 4.1.3 The external heat supply method To balance the cooling

49、 capacity of the test object, heating is supplied to the test room evenly distributed through the walls and the floor. The ceiling shall be insulated in such a way that during the test the heat flow through the ceiling is less than 0,40 Wm-2. The temperature of the inner walls and floor of the test room shall be controlled and maintained uniform at any level necessary to keep the desired room temperature. The maximum temperature difference between