ASHRAE 164 1-2012 Method of Test for Residential Central-System Humidfiers.pdf

1、ANSI/ASHRAE Standard 164.1-2012Supersedes ANSI/ASHRAE Standard 164.1-2008Method of Test forResidentialCentral-SystemHumidifiersApproved by the ASHRAE Standards Committee on October 2, 2012; by the ASHRAE Board of Directors on October 26, 2012;and by the American National Standards Institute on Octob

2、er 27, 2012.ASHRAE Standards are scheduled to be updated on a five-year cycle; the date following the standard number is the year ofASHRAE Board of Directors approval. The latest edition of an ASHRAE Standard may be purchased on the ASHRAE Web site(www.ashrae.org) or from ASHRAE Customer Service, 17

3、91 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail:ordersashrae.org. Fax: 404-321-5478. Telephone: 404-636-8400 (worldwide) or toll free 1-800-527-4723 (for orders in US andCanada). For reprint permission, go to www.ashrae.org/permissions. 2012 ASHRAE ISSN 1041-2336SPECIAL NOTEThis American Nation

4、al Standard (ANS) is a national voluntary consensus standard developed under the auspices of ASHRAE.Consensus is defined by the American National Standards Institute (ANSI), of which ASHRAE is a member and which has approved thisstandard as an ANS, as “substantial agreement reached by directly and m

5、aterially affected interest categories. This signifies the concurrenceof more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that aneffort be made toward their resolution.” Compliance with this standard is voluntary until an

6、d unless a legal jurisdiction makes compliancemandatory through legislation.ASHRAE 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

7、 writing the Standard. The ProjectCommittee Chair and Vice-Chair must be members of 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 ProjectComm

8、ittees.The Manager of Standards of ASHRAE should be contacted for:a. interpretation 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

9、 uses its best efforts to promulgate Standards and Guidelines for the benefit of the public in light of available information andaccepted industry practices. However, ASHRAE does not guarantee, certify, or assure the safety or performance of any products, components,or systems tested, installed, or

10、operated in accordance with ASHRAEs Standards or Guidelines or that any tests conducted under itsStandards or Guidelines will be nonhazardous or free from risk.ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDSASHRAE Standards and Guidelines are established to assist industry and the public by offeri

11、ng a uniform method of testing for ratingpurposes,bysuggestingsafepracticesindesigningandinstallingequipment,byprovidingproperdefinitionsofthisequipment,andbyprovidingother information that may serve to guide the industry.The creation of ASHRAE Standards and Guidelines is determined by the need for

12、them,and conformance to them is completely voluntary.In 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 Standing Standard Project Committee 164CognizantTC:TC 5

13、.11, Humidifying EquipmentSPLS Liaison: Steven F. Bruning*Denotes members of voting status when the document was approved for publicationGary L. Berlin, Chair* James M. Bucholtz* Byron F. Horak*Daryl M. Stauffer, Secretary* Scott Eliason* Larry J. Hughes*Bruce Billedeaux* Patricia T. Graef* Roger M.

14、 Pasch*Eric L. Brodsky* Dwight H. Heberer*ASHRAE STANDARDS COMMITTEE 20112012Carol E. Marriott, Chair Krishnan Gowri Janice C. PetersonKenneth W. Cooper, Vice-Chair Maureen Grasso Douglas T. ReindlDouglass S. Abramson Cecily M. Grzywacz Boggarm S. SettyKarim Amrane Richard L. Hall James R. TaubyChar

15、les S. Barnaby Rita M. Harrold James K. VallortHoy R. Bohanon, Jr. Adam W. Hinge William F. WalterSteven F. Bruning Debra H. Kennoy Michael W. WoodfordDavid R. Conover Jay A. Kohler Craig P. WraySteven J. Emmerich Eckhard A. Groll, BOD ExOAllan B. Fraser Ross D. Montgomery, COStephanie C. Reiniche,

16、Manager of Standards 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.CONTENTSANSI/ASHRAE Standard 164.1-2012,Method ofTest for Residential Central-System H

17、umidifiersSECTION PAGEForeword. 21 Purpose 22 Scope . 23 Definitions. 24 Symbols and Subscripts. 25 Units of Measurement 36 Instruments and Methods of Measurement 37 Equipment and Setup. 68 Observations and Conduct of Test. 89 Calculations 1010 Report and Results of Test. 1211 Normative References 1

18、2Informative Appendix AInformative References12NOTEApproved addenda, errata, or interpretations for this standard can be downloaded free of charge from the ASHRAEWeb site at www.ashrae.org/technology. 2012 ASHRAE1791 Tullie Circle NE Atlanta, GA 30329 www.ashrae.org All rights reserved.ASHRAE is a r

19、egistered trademark of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.ANSI is a registered trademark of the American National Standards Institute. ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either prin

20、t or digital form is not permitted without ASHRAEs prior written permission.2 ANSI/ASHRAE Standard 164.1-2012(This foreword is not part of this standard. It is merelyinformative and does not contain requirements necessaryfor conformance to the standard. It has not beenprocessed according to the ANSI

21、 requirements for astandard and may contain material that has not beensubject to public review or a consensus process.Unresolved objectors on informative material are notoffered the right to appeal at ASHRAE or ANSI.)FOREWORDThis standard provides rules for the testing of central-system humidifiers

22、for residential applications. Its purposeis to provide a uniform method for testing in a laboratoryenvironment. Although the method of test originated inAHRI Standard 610, Performance Rating of Central SystemHumidifiers, the project committee has developed this sep-arate method of test to be used in

23、dependently of the Air-Conditioning, Heating, and Refrigeration Institute (AHRI)rating standard so that manufacturers, specifiers, install-ers, and users of central-system residential humidifiers cantest a humidifiers capacity under a variety of conditionswith uniform results. This method of test wa

24、s prepared incooperation with AHRI to correspond with AHRI Standard610.Standard 164.1 is the first in a series of three standardsfor the testing of humidifiers. Proposed Standard 164.2 willaddress self-contained humidifiers for residential applica-tions, and proposed Standard 164.3 will address comm

25、ercialand industrial humidifiers.1. PURPOSEThis standard establishes a uniform method of laboratorytesting for rating central-system residential humidifiers.2. SCOPE2.1 The scope of this standard covers a method of test formeasuring the humidification rate of central-system residen-tialhumidifiersin

26、tendedforusewithforced-warm-airheatingand/or cooling systems.2.2 Thismethodoftestdescribesthetestapparatus,modeoftest conduction, and information to be recorded.2.3 Tests covered include methods for measuring electricalpower input, water flow rate, water temperature, and waterpressure to the test hu

27、midifier.Also included are airflow rate,static pressure, temperature, and relative humidity enteringand maintained by the test apparatus.2.4 Information resulting from the application of this testmethod is intended for use by manufacturers, specifiers,installers, and users of central-system resident

28、ial humidifiers.2.5 This test method does not apply to self-containedhumidifiers, portable humidifiers, or humidifiers for commer-cial and industrial applications.3. DEFINITIONScentral-system humidifier: a humidifier that is installed in, ordischarges into, the airstream of an HVAC system.humidifica

29、tion rate: a measure of the ability of a humidifiertoaddmoisturetoitssurroundingatmosphere,expressedaskg(lbm) of water evaporated per unit of time.humidifier: a device designed to add moisture to air.heating or cooling unit: the unit that the humidifier isconnected to or mounted within.portable humi

30、difier: a type of humidifier that has the charac-teristics described in AHAM-HU-1, Household Humidifiers.1return duct humidifier: a humidifier that is connected to ahorizontal duct and that has the function of returning humid-ified air to the central system.return plenum central-system humidifier: a

31、humidifierthatisconnected to a vertical duct and has the function of returninghumidified air to the central system.self-contained humidifier: a humidifier that adds moisture tothe air without the need of other mechanical devices and is notconnected to the central heating/ventilation system.settling

32、means: a way to provide uniform airflow to the airmeasurement and supply plenums.shall and should: the word shall indicates requirements ofthis standard; the word should indicates recommendations ofthis standard.supply duct central-system humidifier: a humidifier that isconnected to a horizontal duc

33、t and has the function of deliv-ering humidified air from the central system.supply plenum central-system humidifier:ahumidifierthatisconnected to a vertical duct and has the function of deliveringhumidified air from the central system.4. SYMBOLS AND SUBSCRIPTSAN= nozzle area, m2(ft2)At= cross-secti

34、onal area of a test section, m2(ft2)C = nozzle discharge coefficient, dimensionlessD = duct diameter, m (ft)DPT= pressure tap diameter, mm (in.)DN= nozzle exit diameter, m (ft)HX= weight of water at time X, kg (lbm)Hm= humidification rate, kg/h (lbm/h)L = nozzle throat dimension, m (ft)M = diametero

35、f roundductorequivalent diameterofrectangular duct, m (ft)Mwf= final weight of water, kg (lbm)Mwi= initial weight of water, kg (lbm)P = static pressure at nozzle, plane N, kPa (in. Hg)pb= total pressure at the nozzle includingatmospheric pressure, kPa (in. Hg)pe= saturated vapor pressure at twx, kPa

36、 (in. Hg) 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.ANSI/ASHRAE Standard 164.1-2012 3pp= partial vapor pressure, kPa (in. Hg)R = gas constant for air

37、, J/(kgK) (ftlbf/lbmR)Re = Reynolds number, dimensionlessQx= airflow rate at plane x, m3/s (cfm)Qstd= flow rate of standard air, m3/s (cfm)tdx= dry-bulb temperature at plane x, C (F)twx= wet-bulb temperature at plane x, C (F)Vx= air velocity at plane x, m/s (fpm)W = total power, WY = nozzle expansio

38、n factor, dimensionless = static pressure ratio for nozzles, dimensionless = diameter ratio for nozzles, dimensionlessPx= pressure differential across plane x, Pa (in.w.g.)PN= pressure differential of nozzle, Pa (in. w.g.)Pstd= pressure differential corrected to standard air,Pa (in. w.g.)x= air visc

39、osity at plane x, Ns/m2(lbm/fts) = air density, kg/m3(lbm/ft3)x= air density at plane x, kg/m3(lbm/ft3)std= density of air at standard air condition, kg/m3(lbm/ft3) = summation sign, dimensionless4.1 Subscriptsf = finali = initialN = nozzlem = massstd = standardw = waterNumerical subscripts are used

40、 to define the followinglocations:N1 = entering the nozzleN2 = leaving the nozzle1 = measurements taken at Plane 12 = measurements taken at Plane 25. UNITS OF MEASUREMENT5.1 Systems of Units. This standard employs the Interna-tional System of Units (le Systeme International dUnites)2(SI). Values sha

41、ll be based on the National Institute of Stan-dards andTechnology (NIST) values which, in turn, are basedon the fundamental values of the International Bureau ofWeights and Measures. Inch-pound (I-P) units appear inparentheses following SI units. Where necessary, equivalentI-P formulas are provided.

42、5.2 Dimensionless Groups. Various dimensionless quanti-ties appear in the text. Any consistent system of units is per-mitted to evaluate these quantities unless a numerical factor isincluded, in which case units shall be as specified.6. INSTRUMENTS AND METHODS OFMEASUREMENT6.1 Accuracy. The specific

43、ations for instruments and meth-ods of measurement include accuracy requirements. Calibra-tion procedures shall be employed to minimize systematicerrors.6.2 Pressure. Pressure at a point shall be measured on anindicator, such as a manometer, transducer, or oil-filled gage.The instrument that is sele

44、cted for a particular measurementshall meet the requirements of this standard.6.2.1 Manometers and Other Air Pressure IndicatingInstruments. Air pressure and atmospheric pressure shall bemeasured with electronic instruments, such as transducers ormanometers of the liquid column type, using inclined

45、or ver-tical legs or other instruments that provide a maximum errorof 1% of the maximum observed reading or 1 Pa (0.005 in.w.g.), whichever is larger.6.2.1.1 Averaging. Since the flows and pressures mea-sured in this standard may not be steady, the pressure readingsindicated on any instrument used w

46、ill fluctuate with time. Inorder to obtain a true reading, either the instrument shall bedampedorthereadingsshallbeaveragedinasuitablemanner.It is acceptable to accomplish multipoint or continuous recordaveraging using instruments and analyzers designed for thispurpose.6.2.1.2 Corrections. Manometer

47、 readings shall be cor-rected for any difference in density of gage fluid from stan-dard conditions, for any difference in gas column balancingeffect from standard conditions, or for any change in length ofthe graduated scale due to temperature.Exception: Corrections are not required (1) for tempera

48、-tures between 14C and 26C (58F and 78F), (2) forlatitudes between 30 and 60, and (3) for elevations upto 1500 m (5000 ft).6.2.2 Static Pressure Taps. The static pressure at a pointshall be sensed with a pressure tap of the proportions shown inFigure 1.The pressure signal is then transmitted to an i

49、ndicator.6.2.2.1 Averaging. An individual pressure tap is sensi-tive only to the pressure in the immediate vicinity of the hole.In order to obtain an average, at least four identical taps shallbe manifolded into a piezometer ring.The manifold shall havean inside area of at least four times the inside area of each tap.6.2.2.2 Piezometer Rings. Piezometer rings shall beused for upstream and downstream nozzle taps, PN1and PN2,andforchambermeasurements, P1and P2,andforalternate P2.Measuring planes shall be located as shown in Figures 3 and 5.6.