1、 ANSI/AHRI Standard 640-2005(Formerly ARI Standard 640-2005)2005 Standard for Performance Rating of Commercial and Industrial HumidifiersPrice $5.00 (M) $10.00 (NM) Copyright 2002, by Air-Conditioning, Heating, and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Tradema
2、rk Office IMPORTANT SAFETY DISCLAIMER AHRI does not set safety standards and does not certify or guarantee the safety of any products, components or systems designed, tested, rated, installed or operated in accordance with this standard/guideline. It is strongly recommended that products be designed
3、, constructed, assembled, installed and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/guideline. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry pr
4、actices. AHRI does not certify or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. Note: This standard supersedes ARI Standard 640-1996. TABLE OF CONTENTS SECTION PAGE Section 1. Purpose 1 Section 2. Scope . 1 Section 3. Definitions. 1 Sectio
5、n 4. Classifications . 3 Section 5. Test Requirements 3 Section 6. Rating Requirements . 4 Section 7. Minimum Data Requirements for Published Ratings . 5 Section 8. Marking and Nameplate Data . 5 Section 9. Conformance Conditions 5 TABLES Table 1. Classification of Commercial and Industrial Humidifi
6、ers 3 Table 2. Conditions for Standard Rating Tests . 4 APPENDICES Appendix A. References - Normative 6 Appendix B. References - Informative . 6 Appendix C. Method of Test for Commercial and Industrial Humidifiers - Normative 7 TABLES FOR APPENDICES Table C1. Nozzle Discharge Coefficient . 7 Table C
7、2. Temperature Correction Factor . 8 FIGURES FOR APPENDICES Figure C1. Test Apparatus for Direct Steam Injection . 10 Figure C2. Test Apparatus for Heated Tanks . 11 _ANSI/AHRI STANDARD 640-2005 1PERFORMANCE RATING OF COMMERCIAL AND INDUSTRIAL HUMIDIFIERS Section 1. Purpose 1.1 Purpose. The purpose
8、of this standard is to establish for Commercial and Industrial Humidifiers: definitions; classifications; test requirements; rating requirements; minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions. 1.1.1 Intent. This standard is intended for the g
9、uidance of the industry, including manufacturers, engineers, installers, contractors, and users. 1.1.2 Review and Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to factory-made Commercial and Industrial Humidifier
10、s, as defined in Section 3. 2.1.1 Energy Source. This standard applies to electric, gas, or hot water operated Commercial and Industrial Humidifiers including those that depend on steam from a central steam boiler. 2.1.2 Installation. Commercial and Industrial Humidifiers are intended for installati
11、on into an enclosed space or air system. 2.2 Exclusions. This standard does not apply to the following: 2.2.1 Central System Humidifiers as defined in the AHRI Standard 610 and to Self-Contained Humidifiers as defined in AHRI Standard 620. 2.2.2 Portable Humidifiers as defined in AHAM HU-1. Section
12、3. Definitions All terms in this document shall follow the standard industry definitions in the current edition of ASHRAE Terminology of Heating, Ventilation, Air Conditioning and Refrigeration unless otherwise defined in this section. 3.1 Commercial and Industrial Humidifier (Humidifier). A device
13、designed to add moisture to air. 3.1.1 Atomizing Humidifiers. A type of Humidifier intended for duct applications in which water is reduced to minute particles and dispersed to air as a fine mist. 3.1.1.1 Centrifugal Type Atomizer. Utilizes a high-speed disk to sling water to its rim where it is thr
14、own onto plates or a comb to produce a fine mist. 3.1.1.2 Nozzle Type Atomizers. Utilizes a nozzle, compressed-air, water, or air and water, to reduce water to a fine mist. a. Compressed Air. Compressed air is forced through an annular orifice at the nozzle tip creating a vortex at the tip. Water is
15、 forced through the center orifice of the nozzle where it is atomized on contact with the compressed air at the nozzle tip. b. Compressed Air and Water. Compressed air and water are combined inside the nozzle and discharged onto a resonator to produce a fine mist at the nozzle tip. c. Compressed Wat
16、er. High pressure pump is used to force water through the orifice of a nozzle to produce a fine mist at the nozzle tip. ANSI/AHRI STANDARD 640-2005 _ 2 3.1.1.3 Ultrasonic Atomizer. A piezoelectric transducer immersed in a reservoir of mineral free water. The transducer converts a high-frequency elec
17、tronic signal into a high-frequency mechanical oscillation. The mechanical oscillation is directed at the surface of the water, where at very high frequencies it creates a fine mist. 3.1.2 Direct Injection Steam Humidifiers. A type of Humidifier intended for duct applications in which steam, water v
18、apor under pressure and at high temperature, is dispersed directly into the air. a. Steam Cup Type. Utilizes a cup and drain mounted beneath the duct. Steam is injected into the sides of a cup allowing most of the moisture of the steam to enter into the air while permitting the condensate to fall in
19、to the cup by gravity and into the steam trap. b. Steam Separator Type. Utilizes an enclosed distribution pipe, a separating chamber, an integral control valve, and a drain to distribute steam into the air. Steam is injected directly into the enclosed distribution pipe providing reheat to the outgoi
20、ng steam passing through the distributor pipe before being released into the air. The steam then enters the separating chamber which allows dry steam to pass through the control valve and into the distributor pipe while allowing condensate to fall by gravity into the drain. The moisture of the steam
21、 is reheated while in the distributor pipe before being dispersed into the air. c. Steam Panel Type. Utilizes an integral control valve, a header with multiple distributor pipes, and a drain. The control valve regulates the amount of steam that is injected into the header, which allows dry steam to
22、pass into the distributor pipe(s) while allowing condensate to escape through the drain. The moisture of the steam in the distributor pipe(s) is dispersed into the air. 3.1.3 Heated Tank Humidifiers. A type of Humidifier which converts tank water to steam using electricity, gas, or steam. The steam
23、is dispersed into a duct system through dispersion manifolds. If the Humidifier is a free standing unit, the steam is dispersed directly into the air space through a fan unit. a. Electrode Type. Utilizes an electric current passing through the water to create heat energy to produce steam. b. Gas Hea
24、ted Type. Utilizes natural gas or propane as the heating method to convert water to atmospheric steam. c. Infrared Type. Utilizes one or more radiant heat bulbs to create heat energy to produce steam. d. Resistance Type. Utilizes one or more electrical elements to heat the water directly to produce
25、steam. e. Steam-to-Steam Type. Utilizes steam from a central boiler passing through a heat exchanger submersed in water to create heat energy to produce steam. f. Hot Water Type. Utilizes hot water from a central boiler passing through a heat exchanger submersed in water to create heat energy to pro
26、duce steam. 3.2 Humidification Capacity. The capacity associated with a Humidifiers ability to add moisture to air expressed in lb/h kg/h of continuous operation. 3.3 Published Rating. A statement of the assigned values of those performance characteristics, under stated Rating Conditions, by which a
27、 unit may be chosen to fit its application. These values apply to all units of like nominal size and type (identification) produced by the same manufacturer. The term Published Rating includes the rating of all performance characteristics shown on the unit or published in specifications, advertising
28、 or other literature controlled by the manufacturer, at stated Rating Conditions. 3.3.1 Application Rating. A rating based on tests performed at application Rating Conditions (other than Standard Rating Conditions). 3.3.2 Standard Rating. A rating based on tests performed at Standard Rating Conditio
29、ns. 3.4 Rating Conditions. Any set of operating conditions under which a single level of performance results and which causes only that level of performance to occur. 3.4.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics. 3.5 “Shall“ or “
30、Should“. “Shall“ or “should“ shall be interpreted as follows: 3.5.1 Shall. Where “shall“ or “shall not“ is used for a provision specified, the provision is mandatory if compliance with the standard is claimed. 3.5.2. Should. “Should“ is used to indicate provisions which are not mandatory but which a
31、re desirable as good practice. _ANSI/AHRI STANDARD 640-2005 33.6 Supplementary Heat. Heat used to enhance evaporation when used in the recirculating system or to heat water for direct evaporation. Section 4. Classifications 4.1 Commercial and Industrial Humidifiers within the scope of this standard
32、may be classified as shown in Table 1. Table 1. Classification of Commercial and Industrial Humidifiers Model Group Model Designation AHRI Type Group I Centrifugal Type Atomizer ACA Nozzle Type Atomizer ANA Ultrasonic Atomizer AUA Group II Direct Steam Injection (Cup Type) IDS-C Direct Steam Injecti
33、on (Separator Type) IDS-S Direct Steam Injection (Panel Type) IDS-P Heated Tank (Electrode Type) IHT-E Heated Tank (Gas Heated Type) IHT-G Heated Tank (Infrared Type) IHT-I Heated Tank (Resistance Type) IHT-R Heated Tank (Steam-to-Steam Type) IHT-SS Heated Pan (Hot Water Type) IHP-HW Section 5. Test
34、 Requirements 5.1 Test Requirements. Published Ratings shall be verified by tests conducted in accordance with the test procedure described in Appendix C. 5.1.1 Equipment. Humidifiers shall be tested using all components as recommended by the manufacturer. 5.1.2 Electrical Conditions. Nameplate volt
35、ages are shown in AHRI Standard 110, Table 1. Nameplate voltages for 50 Hz systems shall include one or more of the utilization voltages shown in IEC Standard 60038. Tests shall be performed at the nameplate rated voltage and frequency unless otherwise specified in this standard. For all dual namepl
36、ate voltage equipment covered by this standard, tests shall be performed at both voltages or at the lower voltage if only a single rating is to be published. ANSI/AHRI STANDARD 640-2005 _ 4 Section 6. Rating Requirements 6.1 Published Ratings. Published Ratings shall include Humidification Capacity,
37、 power input, and energy input of Supplementary Heat. Humidification Capacity1shall be expressed in lb/h kg/h and stated to the nearest 0.1 lb/h 0.05 kg/h. Power input shall be expressed in kW and stated to the nearest 0.1 kW. Where Supplementary Heat other than electric heat is used, the energy inp
38、ut shall be expressed in multiples of 300 Btu/h 87.9 W. 6.2 Standard Ratings. Ratings based on data determined by the test requirements prescribed in Section 5 shall be published as Standard Ratings when conducted at the Standard Rating Conditions specified in Table 2. 6.3 Application Ratings. Ratin
39、gs based on data determined by test requirements prescribed in Section 5 and conducted using Rating Conditions other than those specified in 6.2 shall be published as Application Ratings. 6.4 Tolerances. To comply with this standard, measured test results shall not be less than 95% of Published Rati
40、ngs for Humidification Capacity and shall not exceed 110% of Published Ratings for power input or energy input of Supplementary Heat. Where Supplementary Heat (water) is used, the energy input from this source shall not be more than the rated power input. Table 2. Conditions for Standard Rating Test
41、s Humidifier Type Room Conditions Duct Air Conditions1Supply Water Temperature Supply Water Pressure Water Temp. Entering 200F 93.3C Leaving 190F 87.8C Steam Pressure Entering: 10 psi 69 kPa Condensate Return Pressure: 0 psi 0 kPa RH 30% Temp. 75.0F 23.9C RH 30% Temp. 75.0F 23.9C 60.0F 15.6C 60.0 ps
42、i 414 kPa Group I Atomizing X X X X X Group II Direct Steam Injection X X Heated Tank X X X X3X2Notes: 1.Where applicable, duct airflow velocity is 500 fpm 2.5 m/s 2%. 2.Where applicable. 3.Applicable to hot water type only. 1When converting Humidification Capacity from gal/day to lb/h, one gallon s
43、hall be assumed to weigh 8.34 lb. When converting Humidification Capacity from kg/h to L/day, one liter of water shall be assumed to weigh 1 kg. _ANSI/AHRI STANDARD 640-2005 5Section 7. Minimum Data Requirements for Published Ratings 7.1 Minimum Data Required for Published Ratings. As a minimum, Pub
44、lished Ratings shall consist of the following information: a. Humidification Capacity, lb/h kg/h b. Power input, W kW c. Energy input of Supplementary Heat, Btu/h W, where Supplementary Heat other than electric heat is used. As a minimum, Published Ratings shall include all Standard Ratings. All cla
45、ims to ratings within the scope of this standard shall include the statement “Rated in accordance with AHRI Standard 640”. All claims to ratings outside the scope of this standard shall include the statement “Outside the scope of AHRI Standard 640”. Wherever Application Ratings are published or prin
46、ted, they shall include a statement of the conditions at which the ratings apply. Section 8. Marking and Nameplate Data 8.1 Marking and Nameplate Data. As a minimum, the nameplate shall display the manufacturers name, model designation, and electrical characteristics. Nameplate voltages for 60 Hz sy
47、stems shall include one or more of the equipment nameplate voltage ratings shown in AHRI Standard 110, Table 1. Nameplate voltages for 50 Hz systems shall include one or more of the utilization voltages shown in IEC Standard 60038. Section 9. Conformance Conditions 9.1 Conformance. While conformance
48、 with this standard is voluntary, conformance shall not be claimed or implied for products or equipment within the standards Purpose (Section 1) or Scope (Section 2) unless such claims meet all of the requirements of the standard and all of the testing and rating requirements are measured and reported in complete compliance with the standard. Any product that has not met all the requirements of the standard shall not reference, state, or acknowledge the standard in any written, oral, or electronic communication. ANSI/AHRI STANDARD
