ASHRAE 200 ADD B-2017 Methods of Testing Chilled Beams.pdf

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1、ANSI/ASHRAE Addendum b toANSI/ASHRAE Standard 200-2015Methods of TestingChilled BeamsApproved by ASHRAE on March 31, 2017 and by the American National Standards Institute on April 1, 2017.This addendum was approved by a Standing Standard Project Committee (SSPC) for which the Standards Committee has

2、established a documented program for regular publication of addenda or revisions, including procedures for timely, docu-mented, consensus action on requests for change to any part of the standard. The change submittal form, instructions, anddeadlines may be obtained in electronic form from the ASHRA

3、E website (www.ashrae.org) or in paper form from theSenior Manager of Standards. The latest edition of an ASHRAE Standard may be purchased on the ASHRAE website (www.ashrae.org) or from ASHRAECustomer Service, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail: ordersashrae.org. Fax: 678-539-212

4、9. Tele-phone: 404-636-8400 (worldwide), or toll free 1-800-527-4723 (for orders in US and Canada). For reprint permission, goto www.ashrae.org/permissions. 2017 ASHRAE ISSN 1041-2336SPECIAL NOTEThis American National Standard (ANS) is a national voluntary consensus Standard developed under the ausp

5、ices of ASHRAE. Consensus is definedby the American National Standards Institute (ANSI), of which ASHRAE is a member and which has approved this Standard as an ANS, as“substantial agreement reached by directly and materially affected interest categories. This signifies the concurrence of more than a

6、 simple majority,but not necessarily unanimity. Consensus requires that all views and objections be considered, and that an effort be made toward their resolution.”Compliance with this Standard is voluntary until and unless a legal jurisdiction makes compliance mandatory through legislation. ASHRAE

7、obtains consensus through participation of its national and international members, associated societies, and public review.ASHRAE Standards are prepared by a Project Committee appointed specifically for the purpose of writing the Standard. The ProjectCommittee Chair and Vice-Chair must be members of

8、 ASHRAE; while other committee members may or may not be ASHRAE members, allmust be technically qualified in the subject area of the Standard. Every effort is made to balance the concerned interests on all Project Committees. The Senior Manager of Standards of ASHRAE should be contacted fora. interp

9、retation of the contents of this Standard,b. participation in the next review of the Standard,c. offering constructive criticism for improving the Standard, ord. permission to reprint portions of the Standard.DISCLAIMERASHRAE uses its best efforts to promulgate Standards and Guidelines for the benef

10、it of the public in light of available information and acceptedindustry practices. However, ASHRAE does not guarantee, certify, or assure the safety or performance of any products, components, or systemstested, installed, or operated in accordance with ASHRAEs Standards or Guidelines or that any tes

11、ts conducted under its Standards or Guidelineswill be nonhazardous or free from risk.ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDSASHRAE Standards and Guidelines are established to assist industry and the public by offering a uniform method of testing for rating purposes, bysuggesting safe pract

12、ices in designing and installing equipment, by providing proper definitions of this equipment, and by providing other informationthat may serve to guide the industry. The creation of ASHRAE Standards and Guidelines is determined by the need for them, and conformanceto them is completely voluntary.In

13、 referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or implied,that the product has been approved by ASHRAE.ASHRAE Standard Project Committee 200Cognizant TC: 5.3, Room Air DistributionSPLS Liaison: David RobinMikhail Koupriy

14、anov*, Chair Mary Opalka*, Secretary Tom Rice*Zhiqiang Zhai*, Vice-Chair James R. Kline* Denotes members of voting status when the document was approved for publicationASHRAE STANDARDS COMMITTEE 20162017Rita M. Harrold, Chair Michael W. Gallagher Cyrus H. NasseriSteven J. Emmerich, Vice-Chair Walter

15、 T. Grondzik David RobinJames D. Aswegan Vinod P. Gupta Peter SimmondsNiels Bidstrup Susanna S. Hanson Dennis A. StankeDonald M. Brundage Roger L. Hedrick Wayne H. Stoppelmoor, Jr.Drury B. Crawley Rick M. Heiden Jack H. ZarourJohn F. Dunlap, Srinivas Katipamula William F. Walter, BOD ExOJames W. Ear

16、ley, Jr. Cesar L. Lim Patricia Graef, COKeith I. Emerson Arsen K. MelikovJulie M. Ferguson R. Lee Millies, Jr.Stephanie C. Reiniche, Senior Manager of Standards ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is n

17、ot permitted without ASHRAEs prior written permission.ANSI/ASHRAE Addendum b to ANSI/ASHRAE Standard 200-2015 1(This foreword is not part of this standard. It is merelyinformative and does not contain requirements necessaryfor conformance to the standard. It has not been pro-cessed according to the

18、ANSI requirements for a standardand may contain material that has not been subject topublic review or a consensus process. Unresolved objec-tors on informative material are not offered the right toappeal at ASHRAE or ANSI.)FOREWORDThis addendum includes a method of test for water pressuredrop, revis

19、ions to the normative references, and an update tothe dew-point temperature tolerances. This addendum modifies changes made by addendum a,which can be downloaded at https:/www.ashrae.org/stan-dards-research-technology/standards-addenda.Note: In this addendum, changes to the current standardare indic

20、ated in the text by underlining (for additions) andstrikethrough (for deletions) unless the instructions specifi-cally mention some other means of indicating the changes. 4.2.1 Accuracy of the temperature measuring and moist airproperties instruments shall be within the following limits:Air temperat

21、ure 0.2F (0.1C)Water temperature 0.2F (0.1C)Temperature differential 0.1F (0.05C)(sensors calibrated as a pair)Room dew-point temperature 0.1F (0.05C)1.0F (0.6C)4.2.5 Accuracy of the water pressure measuring instru-ments shall be within the following limits:Water pressure 0.05% full scale or0.2 psi

22、(0.1 kPa) 7. NORMATIVE REFERENCES1. ASHRAE. 20062013. ANSI/ASHRAE Standard 41.1-20131986 (RA 2006), Standard Method for Tempera-ture Measurement. Atlanta: ASHRAE.2. ASHRAE. 19892014. ASHRAE Standard 41.3-2014,Standard Method for Pressure Measurement. Atlanta:ASHRAE.3. ASHRAE. 1992. ASHRAE Standard 4

23、1.2-1987(RA1992), Standard Methods for Laboratory AirflowMeasurement. Atlanta: ASHRAE.4. ASHRAE. 2006. ANSI/ASHRAE Standard 70, Methodof Testing the Performance of Air Outlets and Inlets.Atlanta: ASHRAE.5. SMACNA. 2005. HVAC Duct Construction StandardsMetal and Flexible, 3rd edition. Chantilly, VA:

24、SheetMetal and Air Conditioning Contractors NationalAssociation.6. ASHRAE. 2014. ANSI/ASHRAE Standard 41.6-2014,Standard Methods for Humidity Measurement.Atlanta: ASHRAE.7. ASHRAE. 20062015. ASHRAE Standard 41.7-1984(RA 2006) R2015, Standard Methods for Gas FlowMeasurement. Atlanta: ASHRAE.8. AHRI.

25、2014. ANSI/AHRI Standard 220, ReverberationRoom Qualification and Testing Procedures for Deter-mining Sound Power of HVAC Equipment. Arlington,VA: AHRI.9. ISO. 1998. ISO 7726, Ergonomics of the Thermal Envi-ronmentInstruments for Measuring Physical Quan-tities. Geneva, Switzerland: ISO.(This annex i

26、s not part of this standard. It is merely infor-mative and does not contain requirements necessary forconformance to the standard. It has not been processedaccording to the ANSI requirements for a standard andmay contain material that has not been subject to publicreview or a consensus process. Unre

27、solved objectors oninformative material are not offered the right to appeal atASHRAE or ANSI.)NORMATIVE ANNEX FMETHOD OF TESTING WATER PRESSURE DROPF1. METHOD OF TESTING WATER PRESSURE DROPF1.1 The temperatures and pressures of water entering andleaving the chilled beam shall be measured by the appa

28、ratus asillustrated in Figure F-1. The connecting piping shall be thesame size as the chilled-beam supply and return connections.F1.2 Temperature measuring instruments shall be placed soas to measure the temperature of the water entering and leav-ing the beam. The liquid lines shall be insulated at

29、and adja-cent to the temperature measuring instruments. Suitableinsulation having an R-value of 4.5 ft2Fh/Btu (RSI of 0.79m2C/W) or greater shall be applied from the unit under testto at least 6 in. (150 mm) upstream of the inlet temperaturesensor and 6 in. downstream of the outlet temperature senso

30、r.Temperature sensor stems shall be insulated. To minimizepossible temperature stratification, appropriate mixers, suchas “static mixers,” shall be inserted in the inlet and outlet liq-uid lines upstream of the temperature measuring instruments.Alternatively, two close-coupled 90 degree elbows justu

31、pstream of the temperature measuring instruments can serveas mixers provided that the water velocity at the mixing sec-tion is not below 1 ft/s (0.3 m/s).F1.3 Suitable means shall be provided for determining theliquid absolute pressure entering the beam and the liquidpressure drop through the beam a

32、nd measurement apparatusas shown in Figure F-1. The piezometer rings shall be locatedand constructed in accordance with the dimensions shown inFigure F-1. Pressure taps may be used in lieu of piezometerrings. The test setup measurement of pressure drop betweenpiezometer rings or pressure taps shall

33、be reduced by thepressure drop of the total length of pipe between the piezome-ter rings or pressure taps and the beam. The piping loss shallbe determined by calibration of the measurement apparatus. Addendum b to Standard 200-2015Revise Section 4 as follows (I-P and SI).Modify Section 7 as shown (I

34、-P and SI).Add new Normative Annex F as shown (I-P and SI). ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.2 ANSI/ASHRAE Addendum b to ANSI/ASHRAE Standar

35、d 200-2015The pressure drop in the test measurement apparatus atthe test flow, including any pipe between the beam and themeasuring devices, shall be calculated and subtracted fromthe measurement. This piping loss shall be determined by cal-ibration of the test apparatus or by calculation of pressur

36、edrop based on type of material used for the pipe. FIGURE F-1 Measuring apparatus for water pressure drop. ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.

37、ANSI/ASHRAE Addendum b to ANSI/ASHRAE Standard 200-2015 3(This is a normative annex and is part of the standard.)NORMATIVE ANNEX GWATER-SIDE PRESSURE DROPMEASUREMENT PROCEDURENORMATIVEG1. PURPOSEThe purpose of this annex is to prescribe a measurementmethod for water pressure drop and a correction me

38、thod tocompensate for friction losses associated with external pipingmeasurement sections. The measurement method only appliesto pipe of circular cross section.G2. BACKGROUNDThe water-side pressure drop needs to be determined by testwith acceptable measurement uncertainty. The measuredpressure drop,

39、 per this standard, will be determined by usingstatic pressure taps external to the unit in upstream and down-stream piping. When using external piping, adjustment fac-tors are allowed to compensate the reported pressure dropmeasurement. Numerous studies conclude that the determina-tion of a calcula

40、ted correction term for these external compo-nents may contain significant sources of error, and thereforethe use of external correction factors will be restricted to limitthe magnitude of these potential errors. For units with smallconnection sizes, it is feasible that straight pipe sections bedire

41、ctly connected to the units with adequate length to obtainstatic pressure measurements with acceptable systematicerrors due to instrument installation location.G3. MEASUREMENT LOCATIONSStatic pressure taps shall simultaneously meet all of the fol-lowing requirements.G3.1 Static pressure taps may be

42、in either the unit connec-tions (i.e., nozzles) or in additional external piping providedfor the purpose of test measurements.G3.2 If using additional external piping, the piping arrange-ment shall use rigid pipe and may include fittings such aselbows, reducers, or enlargers between the pressure tap

43、 loca-tions and the unit connections. Flexible hose is prohibitedbetween the unit connections and the pressure taps.G3.3 Static pressure taps shall maintain the lengths of cylin-drical straight pipe in the flow path adjacent to each pressuretap location as shown in Table G-1.a. The water pressure me

44、asurement apparatus shall be con-structed in accordance with the length requirements out-lined in Table G-1.b. Construct the water pressure measurement apparatususing a material suitable for the rated pressure of the beambeing tested. Ends shall be threaded or have flanges. Anexample table for sched

45、ule 40 SS piping can be found inTable G-2. c. Straight length upstream of pressure taps: Minimum of 10inside diameters or 6 in. (15 cm), whichever is greater.The 6 in. minimum is required for wrench clearance.d. Straight length downstream of pressure taps: Minimum of3 inside diameters or 6 in. (15 c

46、m), whichever is greater.The 6 in. minimum is required for wrench clearance.G4. STATIC PRESSURE TAPSStatic pressure taps will be in a piezometer ring or piezometermanifold arrangement with a minimum of three taps locatedcircumferentially around the pipe, all taps at equal angle spac-ing. To avoid in

47、troducing measurement errors from recirculat-ing flow within the piezometer ring, each of the pipe tap holesshall have a flow resistance that is greater than or equal to fivetimes the flow resistance of the piezometer ring piping con-nections between any pair of pressure taps. A triple-tee mani-fold

48、 arrangement using four pipe tap holes is the preferredarrangement but is not required if meeting the flow resistancerequirement.G4.1 For design or evaluation purposes, flow resistance maybe estimated by resistance coefficient K factor calculationmethods as found in Crane Technical Paper No. 410. Ge

49、ner-ally, manifold tubing or piping can be evaluated using the Kfactor, and pressure tap holes can be evaluated using orificeflow equations.G4.2 Provisions shall be made to bleed air out of the linesconnected to pressure measurement devices. These provisionsshall take into consideration the orientation of pressure tapsand manifold connections.G5. CORRECTION METHODMeasured water pressure drop values shall be adjusted to sub-tract additional static pressure drop due to external piping.The additional static pressure drop shall be the sum of alllosses