1、ANSI/AMCA 99-16Air Movement and Control Association InternationalAMCA Corporate Headquarters30 W. University Drive, Arlington Heights, IL 60004-1893, USAcommunicationsamca.org nPh: +1-847-394-0150 nwww.amca.orgThis standard in English, Chinese, European Spanish, and Latin American Spanish may be pur
2、chased at www.amca.org/store. 2016 AMCA InternationalStandards HandbookSTANDARDANSI/AMCA Standard 99 Standards Handbook Air Movement and Control Association International 30 West University Drive Arlington Heights, Illinois 60004 AMCA Publications Authority ANSI/AMCA Standard 99-16 was adopted by th
3、e membership of the Air Movement and Control Association International Inc. on October 31, 2016. It was approved by the American National Standards Institute on November 10, 2016 Copyright 2016 by the Air Movement and Control Association International Inc. All rights reserved. Reproduction or transl
4、ation of any part of this work beyond that permitted by Sections 107 and 108 of the United States Copyright Act without the permission of the copyright owner is unlawful. Requests for permission or further information should be addressed to the executive director, Air Movement and Control Associatio
5、n International Inc. at 30 West University Drive, Arlington Heights, IL 60004-1893 U.S. Objections The Air Movement and Control Association (AMCA) International Inc. will consider and take action upon all written complaints regarding its standards, certification programs or interpretations thereof.
6、For information on procedures for submitting and handling complaints, write to AMCA International 30 West University Drive Arlington Heights, IL 60004-1893 U.S.A. European AMCA Avenue des Arts, numro 46 Bruxelles (1000 Bruxelles) Asia AMCA Sdn Bhd No. 7, Jalan SiLC 1/6, Kawasan Perindustrian SiLC Nu
7、sajaya, Mukim Jelutong, 79200 Nusajaya, Johor Malaysia Disclaimer AMCA uses its best efforts to produce publications for the benefit of the industry and the public in light of available information and accepted industry practices. However, AMCA does not guarantee, certify or assure the safety or per
8、formance of any products, components or systems tested, designed, installed or operated in accordance with AMCA publications or that any tests conducted under its publications will be non-hazardous or free from risk. Review Committee David Johnson Berner International Corp Abhishek Jain Airflow Pvt.
9、 Ltd. Brad Skidmore Loren Cook Company John Cermak Acme Engineering and Manufacturing Corp. Kim Osborne Temtrol -CES Group Fernando A. Ruiz Equipos Electromecanicos, S.A de C.V. Marcel Kamutzki Daltec Canadian Buffalo Paul Oakley The New York Blower Company Mark VanderKooy Greenheck Fan Corporation
10、Nicholas Ang Dongguan Wolter Chemco Ventilation Ltd. Tim Vogel Ruskin Roberto Arias ZITRON, S.A. John Oh Hartzell Air Movement Robert Hassler Kinetics Noise Control Armin Hauer ebm-pabst. Inc. Joe Brooks AMCA International Staff Contents 1. Purpose . 1 2. Scope 1 3. Definitions 1 3.1 The AMCA vocabu
11、lary: definitions 1 3.2 The AMCA vocabulary: symbols . 27 4. The Fan Laws . 33 5. Basic Series of Preferred Numbers 40 6. Metric Units and Conversion Factors 41 7. Charts and Tables 1 . 42 8. Classifications for Spark Resistant Construction . 50 9. Drive Arrangements . 52 9.1 Drive arrangements for
12、centrifugal fans 52 9.2 Drive arrangements for axial fans . 54 10. Inlet Box Positions for Centrifugal Fans 55 11. Designation for Rotation and Discharge of Centrifugal Fans 56 12. Motor Positions for Belt or Chain Drive Centrifugal Fans 58 13. Drive Arrangements for Tubular Centrifugal Fans . 59 14
13、. Operating Limits for Centrifugal Fans . 60 Annex A References 65 Annex B ISO Definitions (Informative) 66 ANSI/AMCA Standard 99 | 1 ANSI/AMCA Standard 99 Standards Handbook 1. Purpose The purpose of this standard is to serve as a repository of reference material that supports all other AMCA public
14、ations and standards. 2. Scope This standard serves as a collection of information that can be used in the development of other AMCA documents. It is recommended that the definitions in this document be used in all standards and publications. However, standard and publication developing committees r
15、etain the authority to create and maintain a definition specific to their document. 3. Definitions See Annex B for ISO definitions 3.1 The AMCA vocabulary: definitions Abrasion Resistant Fan (or Damper) A fan or damper having parts subject to wear that are constructed of abrasion resistant and/or ea
16、sily replaceable materials. *See Annex B for ISO definition of this term Absolute Pressure The value of a pressure when the datum pressure is absolute zero. It is always positive. Absolute Roughness A measure of surface unevenness; the distance between high and low points on a surface. Absolute Visc
17、osity; see Viscosity Accessory; see Appurtenance Acoustic Attenuation Device Any component having sound absorption as its primary function. Acoustic Intensity; see Sound Intensity Level Acoustic Media Sound-absorbing material. Acoustic Media Covering The material that is used as a facing or bagging
18、to protect the acoustic media from moisture absorption or air erosion. Acoustical Duct Silencer An air duct section containing sound-absorbing materials that reduce the transmission of sound through the air passage. ANSI/AMCA Standard 99 | 2 Acoustical Louver A louver incorporating sound-absorbing m
19、aterial to reduce sound transmission across an opening. Active Noise-Cancelling Device A device that reduces sound by introducing a sound that is equal and opposite phase. Actual Cubic Feet Per Minute (ACFM) Actual volume airflow rate through a plane of measurement; at the defined air density, expre
20、ssed in ft3/min. Actual Cubic Meters Per Second (ACMS) Actual volume airflow rate through a plane of measurement; at the defined air density, expressed in m3/s. Actuator (Operator) A mechanism attached to a device (for example, a damper, adjustable louver or fan) to move its blades through a specifi
21、ed range of motion. An actuator may be manually, electrically, pneumatically or hydraulically powered. Adjustable Louver A louver in which the blades may be rotated either manually or mechanically. Adjustable Pitch The ability to mechanically alter the angle (pitch) of an impeller blade. Air Term us
22、ed as abbreviation for “air or other gas”; a mixture of gases and a term commonly used to denote any gaseous medium measured, moved or controlled and that may include solid or liquid particulate. *See Annex B for ISO definition of this term Air Curtain A directionally-controlled stream of air moving
23、 across the entire height and width of an opening that reduces the infiltration or transfer of air from one side of the opening to the other and/or inhibits the passage of insects, dust or debris. Air Curtain Average Core Velocity The average of air curtain core velocities measured along the air cur
24、tain width at a defined plane. Air Curtain Core Velocity The maximum air velocity of the air curtain as measured across the air curtain depth at a specified distance from the discharge nozzle. Air Curtain Depth The airstream dimension perpendicular to both the height and width of the opening being p
25、rotected; the short dimension of the airstream. Air Curtain Discharge Angle The angle between the plane of the protected opening and the direction in which the airstream leaves the discharge. Air Curtain Discharge Nozzle An air curtain unit component that directs and controls the airstream. Air Curt
26、ain Discharge Nozzle Depth The inside nozzle dimension perpendicular to both the direction of airflow and the width of the airstream; the short nozzle dimension. Air Curtain Discharge Nozzle Width The inside nozzle dimension perpendicular to the direction of airflow and parallel to the width of the
27、airstream; the long nozzle dimension. ANSI/AMCA Standard 99 | 3 Air Curtain Unit An air moving device that produces an air curtain (or boundary of air) where the width is at least five times the depth and the discharge is not intended to be connected to unitary ductwork. *See Annex B for ISO definit
28、ion of this term Air Curtain Unit Air Power The useful power delivered to the air. This is proportional to the product of the air curtain unit airflow rate and total pressure. Air Curtain Unit Effectiveness A ratio described by the difference in energy loss through an opening without and with the us
29、e of an air curtain divided by the energy loss without the air curtain. The energy loss with the use of the air curtain includes energy consumption of the air curtain unit. Air Curtain Unit Fan Efficiency The ratio of the air curtain air power to the power input to the motor, expressed as a percenta
30、ge. Air Curtain Unit Rated Throw The distance away from an air curtain unit discharge nozzle to a point where a specified minimum air velocity is achieved. Air Curtain Unit Target Distance A distance perpendicular to the discharge nozzle, determined by the sponsor of a test, for the purpose of setti
31、ng up a test. Air Curtain Unit Velocity Projection The average air curtain core velocity at specified distances from the air curtain unit discharge nozzle. Air Curtain Width The airstream dimension perpendicular to both the direction of airflow and the airstream depth; the long dimension of the airs
32、tream. Air Density The mass per unit volume of air. Air Diffuser A duct discharge termination arranged to direct airflow or to promote air mixing. Air Discharge Nozzle A component or an assembly, which may include adjustable vanes, in the air curtain unit that directs and controls the airstream. Air
33、 Discharge Nozzle Depth The shorter inside dimension of an air curtain airstream perpendicular to both the direction of airflow and the airstream width. Air Discharge Nozzle Width The longer inside dimension of an air curtain airstream perpendicular to both the direction of airflow and the nozzle de
34、pth. Air Leakage The volumetric rate of air passing through a device or into the atmosphere while the device is in the closed position. Air Power; see Fan Air Power or Air Curtain Unit Air Power Air System An assembly of connected ducts, filters, conditioning devices, dampers, louvers and fans for t
35、he purpose of moving air from one place to another in a controlled fashion. ANSI/AMCA Standard 99 | 4 Air Throw The aerodynamic axis distance an airstream travels after leaving an air outlet before the air velocity is reduced to a specific terminal value. Airflow A flow of air or an air current, spe
36、cifically one that passes through a dimensionally defined plane. Airflow Leakage; see Air Leakage Airflow Measurement Station An airflow measurement station is a multiple-point sensing device that is used to measure the airflow rate in a duct system or fan appurtenance. It may consist of a single se
37、nsor or an array of sensors in permanent position in the air system. It may be supplied as a probe to be inserted into a ductwork or supplied in a casing approximating the size of the air system in which it is installed. Airflow Measurement Station Airflow Rate The airflow rate, based upon the outpu
38、t (pressure, current or voltage of the AMS under test), calculated according to the manufacturers instructions. Airflow Measurement Station Differential Pressure The observed differential pressure between the high-pressure output and the low-pressure output of a differential pressure type AMS. Airfl
39、ow Measurement Station Differential Pressure Output Type (Velocity) Converts air velocity into a differential (velocity) pressure signal that correlates to the velocity or volume of air flowing through a duct. Airflow Measurement Station Electronic Output The observed voltage or current output of an
40、 electronic output type AMS that correlates directly and proportionately to the velocity of airflow in a duct. Airflow Rate; see Volume Airflow Rate Airfoil 1. A shape such that, when it is moved through air, has greater lift than drag. 2. A blade or vane having a streamlined shape. Air-Handling Uni
41、t A packaged assembly of components, such as coils, filters, a fan, a humidifier, etc., that provides for treatment of air before it is distributed. Ambient Temperature Dynamic Closure Ambient temperature (0 C - 49 C 32 F - 120 F) dynamic closure is the ability of a damper to properly travel from th
42、e full open to the full closed position while exposed to specific airflow conditions at ambient temperature. Ambient Temperature Operation The ability of a damper to properly travel from the full open to full closed position and, if a motorized damper, back to a full open position while exposed to s
43、pecific airflow conditions at ambient temperature. Anechoic Termination A device placed at the end of a test duct to prevent excessive reflection of sound waves back into the duct, thus reducing interference with the sound waves being measured. Appurtenances Any item added to the inlet or discharge
44、airstream that affects the performance of the basic air moving or control device. ANSI/AMCA Standard 99 | 5 Attenuate To weaken a signal by reducing its amplitude. Attenuation The amount by which a sound level is decreased as it travels from a sound source to a receiver located at a given point. Ave
45、rage Outlet Velocity The airflow rate of a fan or air curtain per unit area of the discharge, calculated by dividing the airflow rate by the area of the discharge. Average Air Velocity The volume airflow at a plane divided by the cross-sectional area of that plane. Axial Fan A fan that takes in and
46、discharges air in a direction that is generally parallel to the impellers shaft. *See Annex B for ISO definition of this term Axle A shaft on which a damper or louver blade rotates. Backdraft Damper A damper that, when mounted in a duct or opening, permits airflow in one direction only. Backplate A
47、circular plate, a component of a centrifugal fan impeller, that is attached to the fan hub and serves as the major attachment for the impeller blades and as the means of transmitting torque to them. Backplate/Centerplate Liner A strip of steel, ceramic or synthetic material installed in sets, each a
48、ttached to the backplate/centerplate of an impeller, adjacent to an impeller blade. These serve the purpose of protection against erosion. Balance Quality Grade The recommended limits for residual unbalance of a rotor, based upon the intended application. The value represents the product of the unba
49、lance multiplied by the angular velocity and divided by the weight of the rotor. Balancing The process of adding or removing mass in a plane or planes on a rotor in order to move the center of gravity towards the axis of rotation. Balancing Damper A damper used to regulate the airflow in an air system. Balancing Speed That rotational speed, expressed in revolutions per minute (rpm), at which a rotor is balanced. Barometric Damper A backdraft damper having an adjustable start-open pressure and used for gravity ventilation or other low velocity applications. Barometric Pressure
