1、Institute of Environmental Sciences and Technology IEST-RP-CC036.1 Contamination Control Division Recommended Practice 036.1 Testing Fan Filter Units 1827 Walden Office Square, Suite 400 | Schaumburg, IL 60173 USAPhone: (847) 981-0100 Fax: (847) 981-4130 E-mail: informationiest.org Web: www.iest.org
2、 IEST-RP-CC036.1 Institute of Environmental Sciences and Technology IEST 2014 All rights reserved 2 NOTICE AND DISCLAIMER: This Recommended Practice is published by the Institute of Environmental Sciences and Technology (IEST) to advance the technical and engineering sciences. Use of this document i
3、s entirely voluntary, and determination of its applicability and suitability for any particular use is solely the responsibility of the user. Use of this Recommended Practice does not imply any warranty or endorsement by IEST. The information in this publication was considered technically sound by t
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13、y of the certifier or maker of the statement. PROPOSAL FOR IMPROVEMENT: The Working Groups of the Institute of Environmental Sciences and Technology are continually working on improvements to their Recommended Practices and Reference Documents. Suggestions from users of these documents are welcome.
14、If you have a suggestion regarding this document, please use the online Proposal for Improvement form found on the IEST website at www.iest.org. This Recommended Practice was prepared by and is under the jurisdiction of Working Group 36 of the IEST Contamination Control Division. Copyright 2014 by t
15、he Institute of Environmental Sciences and Technology Second printing, July 2017 ISBN: 978-1-937280-13-0 (Electronic Format)ISBN: 978-1-937280-12-3 (Print FormatInstitute of Environmental Sciences and Technology 1827 Walden Office Square, Suite 400 | Schaumburg, IL 60173 USA Phone: (847) 981-0100 Fa
16、x: (847) 981-4130 IEST-RP-CC036.1 Institute of Environmental Sciences and Technology IEST 2014 All rights reserved 3 Testing Fan Filter Units IEST-RP-CC036.1 CONTENTS SECTION 1 SCOPE AND LIMITATIONS . 4 2 REFERENCES . 4 3 TERMS AND DEFINITIONS . 6 4 GENERAL DISCUSSION OF FAN FILTER UNITS . 8 5 TEST
17、REQUIREMENTS AND CONDITIONS 10 6 VOLUMETRIC AIRFLOW . 11 7 ELECTRIC POWER USAGE 12 8 TOTAL PRESSURE 13 9 AIRFLOW UNIFORMITY 13 10 SOUND POWER LEVELS 14 11 REPORTING TEST RESULTS . 14 FIGURE FIGURE 1TYPICAL FAN FILTER UNIT AND DIAGRAM 8 FIGURE 2TYPICAL AIRFLOW CHAMBER. 11 FIGURE B1TEST SETUP TO MEASU
18、RE AIRFLOW THROUGH THE FFU. . 17 FIGURE C1TEST SETUP TO MEASURE SOUND PRESSURE LEVELS. 18 APPENDIX APPENDIX AOTHER DESIGN CONSIDERATIONS: AEROSOL INJECTION AND CHALLENGE UNIFORMITY 16 APPENDIX BALTERNATIVE METHOD FOR MEASUREMENT OF VOLUMETRIC AIRFLOW, ELECTRIC POWER PARAMETERS, AND STATIC PRESSURE .
19、 17 APPENDIX CALTERNATIVE METHOD FOR SOUND POWER LEVEL MEASUREMENTS . 18 IEST-RP-CC036.1 Institute of Environmental Sciences and Technology IEST 2014 All rights reserved 4 Institute of Environmental Sciences and Technology Contamination Control Division Recommended Practice 036.1 Testing Fan Filter
20、Units IEST-RP-CC036.1 1 SCOPE AND LIMITATIONS 1.1 Scope This Recommended Practice (RP) covers laboratory methods for testing the performance of a fan filter unit (FFU). The purpose of this RP is to provide customers and suppliers of FFUs the necessary test protocols for measuring and reporting perfo
21、rmance, excluding filter efficiency. These methods provide the means for direct comparison of units provided by different manufacturers, which may be of varying designs and have different operating features. The test methods identify test equipment and testing procedures necessary to measure volumet
22、ric airflow, electric power parameters (wattage, amperage, voltage, and power factor), available external static pressure, sound power levels, and filter airflow velocity uniformity. These procedures are applicable for FFUs with AC motors, with DC brushless motors, with constant airflow control, and
23、 without constant airflow control. 1.2 Limitations This RP does not provide guidance for field testing, although some of the techniques described herein can be applied to field testing. This RP does not recommend acceptance performance values or limits for FFUs. Codes and standards may be applicable
24、 to the construction and performance of FFUs. These codes and standards should be made part of the agreement between the customer and supplier. The procedures described in this RP are applicable to FFUs with filter dimensions equal to or less than 1.2 m (4 ft) in any direction. Testing for fan filte
25、r housing vibration is an important performance parameter for FFUs used in selected arrangements and installations. This parameter is not part of the testing criteria covered in this RP. This RP does not discuss filtration efficiency or filter performance. These parameters are discussed in IEST-RP-C
26、C001, IEST-RP-CC007, and IEST-RP-CC021. 2 REFERENCES The cited editions of the following documents are incorporated into this RP to the extent specified herein. Users are encouraged to investigate the possibility of applying the most recent editions of the references. 2.1 Applicable documents ANSI/A
27、MCA 210-07 (ANSI/ASHRAE 51-2007) Laboratory Methods of Testing Fans for Aerodynamic Performance Rating ANSI/AMCA 300-08 Reverberant Room Method for Sound Testing of Fans IEST-RP-CC036.1 Institute of Environmental Sciences and Technology IEST 2014 All rights reserved 5 ANSI/ASHRAE 52.2-2007 Method of
28、 Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size IEST-RP-CC001: HEPA and ULPA Filters IEST-RP-CC007: Testing ULPA Filters IEST-RP-CC034: HEPA and ULPA Filter Leak Tests ISO 14644-1: Cleanrooms and associated controlled environments Part 1 Classification of ai
29、r cleanliness ISO 9000 Quality management systems Fundamentals and vocabulary ISO 9614-1 Acoustics Determination of sound power levels of noise sources using sound intensity Part 1: Meas-urement at discrete points MIL-STD-282: Filter Units, Protective Clothing, Gas-Mask Components, and Related Produ
30、cts: Performance Test Methods 2.2 Sources AMCA Air Movement and Control Association International Inc. 30 West University Drive Arlington Heights, IL 60004, USA Phone: 847-394-0150 Fax: 847-253-0088 www.amca.org ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc. 17
31、91 Tullie Circle, NE Atlanta, GA 30329, USA Phone: 404-636-8400 Fax: 404-321-5478 www.ashrae.org IEST Institute of Environmental Sciences and Technology 1827 Walden Office Square, Suite 400 | Schaumburg, IL 60173 USAPhone: 847-981-0100 Fax: 847-981-4130 www.iest.org ISO In US, ISO 14644 documents: I
32、nstitute of Environmental Sciences and Technology 1827 Walden Office Square, Suite 400 | Schaumburg, IL 60173 USA Phone: 847-981-0100 Fax: 847-981-4130 www.iest.org IEST-RP-CC036.1 Institute of Environmental Sciences and Technology IEST 2014 All rights reserved 6 ISO International Organization for S
33、tandardization 1, ch. de la Voie-Creuse, Case postale 56 CH-1211 Geneva 20, Switzerland Telephone: +41 22 749 01 11 Fax: +41 22 749 09 47 www.iso.org MIL/QQ (Military Standard) Standardization Document Order Desk 700 Robbins Avenue Bldg. #4, Section D Philadelphia, PA 19111-5094 http:/dodssp.daps.dl
34、a.mil/ 3 TERMS AND DEFINITIONS acoustic sound power A measure of the sound power radiated from a sound source into the surrounding air in watts. Usually the value is expressed as decibels (dB), referenced to 10-12 W. airflow The movement of air in a given direction with respect to a specified refere
35、nce plane or other designated physical reference. The rate of airflow is expressed in terms of volume per unit time. volumetric airflow The volume of air that passes through a given surface per unit time. airflow velocity The rate of airflow that passes through a given surface. This velocity is expr
36、essed in terms of length per unit time. airflow velocity uniformity The range of variability in the velocity of air exiting from the face of a fan filter unit (FFU), expressed as the percent relative standard deviation of the airflow velocity measurements. cleanroom A room in which the air supply, a
37、ir distribution, filtration of air supply, materials of construction, pressure gradients, and operating procedures are regulated to control airborne particle concentrations to meet established air cleanliness levels, as defined by ISO 14644-1. DOP (or DEHP) Dioctyl phthalate (DOP) or di(2-ethylhexyl
38、) phthalate (DEHP); CAS# 117-81-7. With reference to filter testing, DOP also refers to a poly disperse aerosol of the described material. fan filter unit A compact enclosure that contains an electric air moving device (fan) and an air filter. filter, high-efficiency particulate air (HEPA) An extend
39、ed-medium, dry-type filter in a rigid frame, having a minimum particle collection efficiency of 99.97% for 0.3-m mass median diameter particles of DOP when tested at rated airflow in accordance with MIL-STD-282. IEST-RP-CC036.1 Institute of Environmental Sciences and Technology IEST 2014 All rights
40、reserved 7 filter, ultralow-penetration air (ULPA) A throwaway, extended-medium, dry-type filter in a rigid frame, having a minimum particle-collection efficiency of 99.999% (i.e., a maximum particle penetration of 0.0010%) when tested in accordance with the methods of IEST-RP-CC007. minienvironment
41、 A localized environment created by isolation of a product or process from the surrounding environment by means of an enclosure. national metrology institute (NMI) An organization responsible for providing national or international primary test standards that form an unbroken chain of traceability f
42、or calibration of test equipment. NOTE: Traceability to NMI standards does not always require the use of the NMI of the country in which a calibration laboratory is located. relative standard deviation (% RSD) The uniformity of test data based on the extent of the spread or distribution of the data,
43、 expressed as a percentage of the standard deviation: % RSD= (standard deviationaverage of data )(100) sound intensity The acoustic or sound power per unit area expressed in watts per square area. Usually this value is expressed as dB referenced to 10-12 W/m2. sound power (see acoustic sound power)
44、sound pressure The force of sound on a surface area perpendicular to the direction of the sound, expressed in pascals (Pa). Usually, this value is expressed as dB referenced to 20 micro-pascals. static pressure The pressure exerted by a fluid at rest or, if the fluid is in motion, the pressure it ex
45、erts perpendicular to its direction of flow. external static pressure The static pressure losses caused by any devices located to the exterior of the FFU that are in the airflow path of the FFU. Such devices may be pre-filters added to the FFU, either direct mount to the FFU or remote mount in air r
46、eturn ducting. Pressure losses associated with return air ducts or pathways also affect the FFU performance. available external static pressure The maximum static pressure loss that can be added to either the air inlet or air outlet of the FFU, while still allowing the FFU to be adjusted to maintain
47、 a rated or specified airflow. NOTE: The FFU is generally adjusted by increasing the FFU fan motor speed as the external or internal static losses increase. internal static pressure The static pressure losses caused by such internal components of the FFU as the air filter, any internal sound bafflin
48、g devices, and housing airflow patterns. These losses are unique to the design of the FFU and the associ-ated air filter and will vary as the FFU airflow varies. true power True power is defined by the formula true power = (current)(voltage)(power factor). Power is expressed in watts, current is exp
49、ressed in amps, and voltage is expressed in volts. Power factor ranges from 0.0 to 1.0 and is dependent on the electrical characteristics of the combined electrical components. IEST-RP-CC036.1 Institute of Environmental Sciences and Technology IEST 2014 All rights reserved 8 4 GENERAL DISCUSSION OF FAN FILTER UNITS An FFU is generally described as a compact enclosure that contains an electric air moving device (fa
