1、ANSI/ASHRAE Standard 139-2015(Supersedes ANSI/ASHRAE Standard 139-2007)Method of Testing for RatingDesiccant DehumidifiersUtilizing Heat for theRegeneration ProcessApproved by ASHRAE on August 31, 2015, and by the American National Standards Institute on September 1, 2015.ASHRAE Standards are schedu
2、led to be updated on a five-year cycle; the date following the Standard number is the year ofASHRAE approval. The latest edition of an ASHRAE Standard may be purchased on the ASHRAE website (www.ashrae.org)or from ASHRAE Customer Service, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail: order
3、sashrae.org. Fax: 678-539-2129. Telephone: 404-636-8400 (worldwide) or toll free 1-800-527-4723 (for orders in US and Canada). For reprintpermission, go to www.ashrae.org/permissions. 2015 ASHRAE ISSN 1041-2336SPECIAL NOTEThis American National Standard (ANS) is a national voluntary consensus Standa
4、rd developed under the auspices 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
5、 concurrence of more than a 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 t
6、hrough 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 writing the Standard. The ProjectCommittee Chair and Vi
7、ce-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 Project Committees. The Senior Manager of Standards of ASHRAE shoul
8、d be contacted fora. 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 uses its best efforts to promulgate Standards a
9、nd Guidelines for the benefit 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
10、 Guidelines or that any tests 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 purpos
11、es, bysuggesting safe practices 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
12、 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 139Cognizant TC: 8.12, Desiccant Dehumidification Equipm
13、ent and ComponentsSPLS Liaison: Heather L. PlattWayne E. Caudle,* Chair Michael A. Harvey* Norm Maxwell*Stephen C. Brickley* Eric J. Kozubal* Peter Vandermeulen* Denotes members of voting status when the document was approved for publicationASHRAE STANDARDS COMMITTEE 20152016Douglass T. Reindl, Chai
14、r Keith I. Emerson Heather L. PlattRita M. Harrold, Vice-Chair Steven J. Emmerich David RobinJoseph R. Anderson Julie M. Ferguson Peter SimmondsJames D. Aswegan Roger L. Hedrick Dennis A. StankeNiels Bidstrup Srinivas Katipamula Wayne H. Stoppelmoor, Jr.Donald M. Brundage Rick A. Larson Jack H. Zaro
15、urJohn A. Clark Lawrence C. Markel Julia A. Keen, BOD ExOWaller S. Clements Arsen K. Melikov James K. Vallort, COJohn F. Dunlap Mark P. ModeraJames W. Earley, Jr.Cyrus H. NaeriStephanie C. Reiniche, Senior Manager of Standards ASHRAE (www.ashrae.org). For personal use only. Additional reproduction,
16、distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.CONTENTSANSI/ASHRAE Standard 139-2015,Method of Testing for Rating Desiccant DehumidifiersUtilizing Heat for the Regeneration ProcessSECTION PAGEForeword .21 Purpose.22 Scope23 Def
17、initions .24 Classification of Units35 Requirements36 Instruments .37 Test PreparationEquipment Installation.108 Method of Test 109 Data and Calculations.1010 References13Informative Annex A: Mass Balance Calculations.15NOTEApproved addenda, errata, or interpretations for this standard can be downlo
18、aded free of charge from the ASHRAEWeb site at www.ashrae.org/technology. 2015 ASHRAE1791 Tullie Circle NE Atlanta, GA 30329 www.ashrae.org All rights reserved.ASHRAE is a registered trademark of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.ANSI is a registered
19、trademark of the American National Standards Institute. 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 Standard 139-2015(This foreword is no
20、t 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 ANSI requirements for a standardand may contain material that has not been subject topublic review or a consensus process. Unresolv
21、ed objec-tors on informative material are not offered the right toappeal at ASHRAE or ANSI.)FOREWORDFirst published in 1998, ASHRAE Standard 139 was developedunder guidance from TC 8.12, Desiccant DehumidificationEquipment and Components (previously TC 3.5). The intent ofthis standard is to provide
22、uniform test methods for rating des-iccant dehumidifiers that use heat for the regeneration process.It addresses the test methods, apparatus and instruments to beused, data to be obtained, and calculations needed to confirmvalid test results. This 2015 edition updates the standard by eliminatingdupl
23、ication of content in the published references. In addition,references and recommendations for measurement of moist-airproperties have been revised to reflect the need for increasedaccuracy of these measurements.1. PURPOSEThe purpose of this standard is to provide test methods fordetermining the moi
24、sture removal capacity of heat-regenerateddesiccant dehumidifiers, as well as the coincident thermalenergy performance, so that comparative evaluations of capac-ity and performance can be made irrespective of the type ormake of the device.2. SCOPE2.1 This standard applies to desiccant-based dehumidi
25、fiersoperating at atmospheric pressure. The dehumidifier shalluse solid or liquid desiccants that are regenerated using heatenergy.2.2 Normally, equipment within this standard would consistof one or more desiccant contact stations through which the airto be dehumidified is moved, a means to expose t
26、he moisture-laden desiccant to a source of heat energy for regeneration,and a heating device.2.3 Ancillary devices are normally used to move air to bedehumidified through the device and to provide ventilation forregeneration, but they are not a part of this standard.2.4 This standard is intended toa
27、. describe a uniform method of testing for obtaining perfor-mance data,b. reference and specify test instruments and apparatus,c. describe and specify test data to be recorded, andd. describe and specify calculations to be made from the testdata.2.5 This standard does not apply toa. dehumidifiers op
28、erating at other than atmospheric pressure,b. dehumidifiers not using a desiccant for dehumidification,c. dehumidifiers not using heat for regeneration of the desic-cant,d. ancillary equipment that may be used in any dehumidifi-cation process, such as fans or pre- or post-conditioningequipment, ore.
29、 dehumidifiers using a sealing arrangement that results inleakage rates in excess of 1% of process flow.3. DEFINITIONSairflow: the rate of flow of air through any part of a dehumid-ifier expressed in standard cubic meters per hour (scmh) orstandard cubic feet per minute (scfm).conditioner: a device
30、in which the process air is dehumidifiedin a liquid desiccant system.desiccant contactor: the structure or section containing thedesiccant contacting the air to be dehumidified.heat input: the gross heating value of the fuel supplied to theregeneration heater, expressed in watts (British thermal uni
31、tsper hour).humidity ratio (G): the ratio of the mass of water vapor in theair to the mass of dry air; the ratio is defined as grams ofmoisture per kilogram of dry air (grains of moisture perpound of dry air).liquid desiccant concentration: the concentration of liquiddesiccant expressed as kilograms
32、 (pounds) of anhydrous des-iccant per kilogram (pound) of desiccant solution.liquid desiccant transfer to conditioner: the amount of kilo-grams (pounds) per hour of concentrated desiccant solutiontransferred from the regenerator to the conditioner.moisture removal capacity (MRC): the mass of water v
33、aporremoved from the process air per unit of time and expressedin kilograms per hour (pounds per hour).moisture removal rate (MRR): the mass of water vaporremoved from the desiccant per unit of time via the regenera-tion process (desorption) and expressed in kilograms per hour(pounds per hour).proce
34、ss air: the airstream to be dehumidified.regeneration air: the airstream used as a carrier for thedesorbed moisture and/or a mechanism to transfer heat for theregeneration of the desiccant in a dry desiccant system.regeneration heater: a device used to heat the regenerationair or the liquid desiccan
35、t.regeneration specific heat input (RSHI): the energy per unitmoisture removed expressed in kilojoules per kilogram (Brit-ish thermal units per pound).regenerator: the structure or section containing the desiccantto be regenerated.standard air: for the purpose of this standard, standard air isair wi
36、th a density of 1.20 kg/m3(0.075 lb/ft3). This is sub-stantially equivalent to dry air at 21C (70F) and at a baro-metric pressure of 101.325 kPa (29.92 in. Hg).temperaturedry-bulb temperature: the temperature of air indicatedby an ordinary thermometer. ASHRAE (www.ashrae.org). For personal use only.
37、 Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.ANSI/ASHRAE Standard 139-2015 3wet-bulb temperature: the temperature indicated when athermometer bulb is covered with a water-saturated wickover which air
38、 is caused to flow at approximately 4.5 m/s(900 ft/min) to reach the equilibrium temperature of waterevaporating into the air when the heat of vaporization issupplied by the sensible heat of the air.dew-point temperature: the temperature at which watervapor is saturated (100% rh) with water vapor. I
39、nformative Note: It is improper to refer to dew point as thetemperature at which condensation begins to occur, becausecondensation at the dew point requires removal of latentheat from the vapor to induce condensation and this canoccur only if the vapor is cooled below the dew point.4. CLASSIFICATION
40、 OF UNITS4.1 Desiccant dehumidifiers for the purpose of this standardare classified as to desiccant type and heating source.4.2 Desiccant Typesa. Dry (solid)b. Liquid4.3 Heat Sourcesa. Electricb. Gasc. Steamd. Hot watere. Other appropriate sources of heat5. REQUIREMENTS5.1 Testing Requirements. Desi
41、ccant dehumidifiers shall betested for rating in accordance with the requirements set forthin this section.5.2 Equipment. Equipment to be tested shall contain thedesiccant contactor, regenerator, and regeneration heater reg-ularly furnished with the equipment. Other accessories usedshall be consiste
42、nt with the test procedure.5.3 Performance Determinations. Performance determina-tions of desiccant dehumidifiers shall consist of thea. determination of the water vapor removal capacity at air-flow rates, velocities, and operational parameters definedin Tables 1 and 2 taken at specific inlet condit
43、ions; andb. determination of the coincident thermal energy require-ments at the water vapor removal capacity determined inSection 5.3(a).5.4 Measuring Instruments. All instruments used for mea-surement shall be calibrated by comparison with an instru-ment that has a NIST (or equivalent national labo
44、ratory)certification in the range of use, or an instrument with a NIST(or equivalent national laboratory) certification shall be used.6. INSTRUMENTS6.1 Temperature Measuring Instruments. Temperaturemeasuring instruments, unless noted below, shall be in accor-dance with ASHRAE Standard 41.1 1.6.1.1 T
45、emperature measurement shall be made with one ormore of the following instruments:a. Mercury-in-glass thermometerb. Thermocouplec. Electric resistance thermometer6.1.2 Accuracy shall be within the following limits:a. Air dry-bulb temperatures: 0.3C (0.5F)b. Air dew-point temperatures: 0.3C (0.5F)c.
46、Water and nonvolatile refrigerants: 0.05C (0.1F)d. Other dry-bulb temperatures: 0.3C (0.5F)6.1.3 In no case shall the smallest scale division of the tem-perature measuring instrument exceed twice the specifiedaccuracy. For example, for the specified accuracy of 0.05C(0.1F), the smallest scale divisi
47、on shall not exceed 0.1C(0.2F).6.1.4 Dew-point temperatures shall be used to determinehumidity levels through direct measurement of dew pointusing NIST traceable instruments providing an accuracy of0.3C (0.05F).6.1.5 Whenever possible, temperature measuring instru-ments used to measure the change in
48、 temperature shall bearranged so that they are readily interchanged between thesupply and exhaust position to improve accuracy by using anaverage value.6.1.6 Psychometric measuring stations will be uniformlylocated downstream of the diffusers at each flow measuringstation.6.1.7 The pressures existin
49、g in the psychrometric chambersshall be used in the humidity calculations.6.1.8 The temperature of fluids within conduits shall bemeasured by inserting the temperature measuring instrumentdirectly within the fluid or within a well inserted into the cir-cuit. Glass thermometers shall not be inserted directly into thefluid when pressure within the conduit is great enough toaffect the thermometer reading.6.2 Pressure Measuring Instruments. All pressure measur-ing instruments shall be in accordance with ASHRAE Stan-dard 41.3 2.6.2.1 Pressure measurem
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1