ASHRAE 84 ADD A-2013 Method of Testing Air-to-Air Heat Energy Exchangers.pdf

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1、ANSI/ASHRAE Addendum a toANSI/ASHRAE Standard 84-2013Method of TestingAir-to-Air Heat/EnergyExchangersThis addendum was approved by the ASHRAE Standards Committee on June 22, 2013; by the ASHRAE Board of Directors onJune 26, 2013; and by the American National Standards Institute on June 27, 2013.Thi

2、s addendum is for an ASHRAE Standard scheduled to be updated on a five-year cycle; the date following the standard numberis the year of ASHRAE 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 Cus-tomer Servi

3、ce, 1791 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 and Canada). For reprint permission, go towww.ashrae.org/permissions.“ 2013 ASHRAE ISSN 1041-2336SPECIAL NOTEThis Americ

4、an National 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 direc

5、tly and materially 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

6、 until and 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 p

7、urpose of 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 Pr

8、ojectCommittees.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.DISCLAI

9、MERASHRAE 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, insta

10、lled, or 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

11、by offering a uniform method of testing for ratingpurposes, by suggesting safe practices in designing and installing equipment, by providing proper definitions of this equipment, and by providingother information that may serve to guide the industry.The creation of ASHRAE Standards and Guidelines is

12、 determined by the need for 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 Standard Project Committee

13、84CognizantTC:TC 5.5, Air-to-Air Energy RecoverySPLS Liaison: Krishnan Gowri*Denotes members of voting status when the document was approved for publicationMatthew Friedlander, Chair* Charissa Garcia*Drake H. Erbe, Vice Chair* Alois MalikEric Chen Ronnie R. Moffitt*Gregory M. Dobbs* Kevin Brent Peck

14、*Blake N. Erb* Carey J. Simonson*Matthew W. FosterASHRAE STANDARDS COMMITTEE 20122013Kenneth W. Cooper, Chair Julie M. Ferguson Janice C. PetersonWilliam F. Walter, Vice-Chair Krishnan Gowri Heather L. PlattDouglass S. Abramson Cecily M. Grzywacz Ira G. PostonKarim Amrane Richard L. Hall Douglas T.

15、ReindlCharles S. Barnaby Rita M. Harrold James R. TaubyHoy R. Bohanon, Jr. Adam W. Hinge James K. VallortSteven F. Bruning Debra H. Kennoy Craig P. WrayDavid R. Conover Jay A. Kohler Charles H. Culp, III, BOD ExOSteven J. Emmerich Rick A. Larson Constantinos A. Balaras, COMark P. ModeraStephanie C.

16、Reiniche, Manager of StandardsASHRAE is a registered 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, d

17、istribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.ANSI/ASHRAE Addendum a to ANSI/ASHRAE Standard 84-2013 1(This foreword is not part of this standard. It is merelyinformative and does not contain requirements necessaryfor conforman

18、ce to the standard. It has not beenprocessed according to the ANSI 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 adde

19、ndum clarifies the standard in three areas.Equation 14 is modified to clarify for which airstream thespecific heat Cpis evaluated. Text near Equations 22 and 23is rearranged for clarity. Two sets of uncertainty limits hadbeen provided for Equations 24, 25, and 26; in this adden-dum each equation is

20、provided with a single, unambiguousuncertainty limit.Note: In this addendum, changes to the current standardare indicated in the text by underlining (for additions) andstrikethrough (for deletions) unless the instructions specifi-cally mention some other means of indicating the changes.(14)(14)7.1 L

21、aboratory TestingFor testing of effectiveness, pretest and post-test uncer-tainties shall satisfy the following equations:(19)(20)(21)Otherwise, the results do not satisfy this standard and cannotbe reported. Equation 21 ensures that(22)and If s= tor when lis not calculated because U(l) is toolarge

22、based on the findings of an uncertainty analysis, thenEquation 22 cannot be used and instead,(23)in either of the following situations: when s= tor when lisnot calculated because U(l) is too large based on the findingsof an uncertainty analysis.For RER testing, the pretest and post-test uncertaintie

23、sshall satisfy the following equations:(24)(24)For pressure drop testing, the pretest and post-test uncer-tainties shall satisfy Equations 2526:(25)(25)and(26)and(26)Addendum a to Standard 84-2013In Section 6.1, replace the current Equation 14 as shownbelow. The remainder of Section 6.1 is unchanged

24、.Revise Section 7.1 as shown below. The remainder of Sec-tion 7.1 is unchanged.m1Cp1t1m2Cp2t2 m3Cp3t3m4Cp4t4+mCpminimum(1,3)t1t3- 0.20m1Cpt1m2Cpt2 m3Cpt3m4Cpt4+mminimum(1,3)Cpt1t3- 0.20U s 5%U l 7%U tlt 5% ts 7%+ls-5% U s U t U l 7%U t U s=U RERRER- 0.10U RERRER- 0.10 or4U pressure transducerpspe+-U

25、 ps ps- 0.10U ps ps- 0.10 or2U pressure transducer ps-U pe pe- 0.10U pe pe- 0.10 or2U pressure transducer pe- 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 permissi

26、on.POLICY STATEMENT DEFINING ASHRAES CONCERNFORTHE ENVIRONMENTAL IMPACT OF ITS ACTIVITIESASHRAE is concerned with the impact of its members activities on both the indoor and outdoor environment. ASHRAEsmembers will strive to minimize any possible deleterious effect on the indoor and outdoor environm

27、ent of the systems andcomponents in their responsibility while maximizing the beneficial effects these systems provide, consistent with acceptedstandards and the practical state of the art.ASHRAEs short-range goal is to ensure that the systems and components within its scope do not impact the indoor

28、 andoutdoor environment to a greater extent than specified by the standards and guidelines as established by itself and otherresponsible bodies.As an ongoing goal, ASHRAE will, through its Standards Committee and extensive technical committee structure,continue to generate up-to-date standards and g

29、uidelines where appropriate and adopt, recommend, and promote those newand revised standards developed by other responsible organizations.Through its Handbook, appropriate chapters will contain up-to-date standards and design considerations as the material issystematically revised.ASHRAE will take t

30、he lead with respect to dissemination of environmental information of its primary interest and will seekout and disseminate information from other responsible organizations that is pertinent, as guides to updating standards andguidelines.The effects of the design and selection of equipment and syste

31、ms will be considered within the scope of the systemsintended use and expected misuse. The disposal of hazardous materials, if any, will also be considered.ASHRAEs primary concern for environmental impact will be at the site where equipment within ASHRAEs scopeoperates. However, energy source select

32、ion and the possible environmental impact due to the energy source and energytransportation will be considered where possible. Recommendations concerning energy source selection should be made byits members. 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.ASHRAE 1791 Tullie Circle NE Atlanta, GA 30329 www.ashrae.org8/13