ANSI AHRI 460-2005 PERFORMANCE RATING OF REMOTE MECHANICAL- DRAFT AIR-COOLED REFRIGERANT CONDENSERS.pdf
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1、 2005 STANDARD for PERFORMANCE RATING OF REMOTE MECHANICAL- DRAFT AIR-COOLED REFRIGERANT CONDENSERS ANSI/AHRI Standard 460 (formerly ARI Standard 460)Price $10.00 (M) $20.00 (NM) Copyright 2005, by Air-Conditioning, Heating, and Refrigeration Institute Printed in U.S.A. Registered United States Pate
2、nt and Trademark Office IMPORTANT SAFETY DISCLAIMER ARI 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 product
3、s be designed, constructed, assembled, installed and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/guideline. ARI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted
4、 industry practices. ARI 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 460-2000. TABLE OF CONTENTS SECTION PAGE Section 1. Purpose 1 Section 2. Scope . 1 Section 3. Definition
5、s 1 Section 4. Test Requirements 2 Section 5. Rating Requirements . 3 Section 6. Minimum Data Requirements for Published Ratings . 4 Section 7. Marking and Nameplate Data . 4 Section 8. Conformance Conditions 5 TABLES Table 1. Standard Rating Conditions 3 APPENDICES Appendix A. References - Normativ
6、e 6 Appendix B. References - Informative. 6 ANSI/AHRI STANDARD 460-2005 1PERFORMANCE RATING OF REMOTE MECHANICAL-DRAFT AIR-COOLED REFRIGERANT CONDENSERS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Remote Mechanical-Draft Air-Cooled Condensers: definitions; test r
7、equirements; 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 guidance of the industry, including: manufacturers, designers, installers, contractors and users. 1.1.2 Review an
8、d Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to Remote Mechanical-Draft Air-Cooled Refrigerant Condensers as defined in Section 3 for use with or without external air resistance. 2.2 Exclusions. 2.2.1 This sta
9、ndard does not apply to Air-Cooled Condensers designed primarily for installation within the machinery compartment of a self-contained product or in a factory-assembled condensing unit. 2.2.2 This standard does not apply to remote mechanical-draft evaporatively-cooled refrigerant condensers as cover
10、ed by ARI Standard 490. Section 3. Definitions 3.1 Definitions. All terms in this document 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. 3.2 Bubble Point. Ref
11、rigerant liquid saturation temperature at a specified pressure. 3.3 Dew Point. Refrigerant vapor saturation temperature at a specified pressure. 3.4 Entering Air Dry-Bulb Temperature. The average dry-bulb temperature of the ambient air entering the condenser assembly, F C. 3.5 Entering Air Wet-Bulb
12、Temperature. The average wet-bulb temperature of the air entering the condenser assembly, F C. 3.6 Net Refrigeration Effect. The rate of total heat absorption by the refrigerant, at stated evaporator conditions, of the complete refrigeration system. This effect is equal to the product of the refrige
13、rant mass flow rate through the system and the enthalpy difference between the refrigerant vapor leaving the evaporator and the refrigerant liquid entering the liquid control device of the evaporator, Btu/h W. 3.7 Published Rating. A statement of the assigned values of those performance characterist
14、ics, under stated Rating Conditions, by which a 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 u
15、nit or published in specifications, advertising or other literature, including computer software and computer-generated reports, controlled by the manufacturer, at stated Rating Conditions. ANSI/AHRI STANDARD 460-2005 2 3.7.1 Application Rating. A rating based on tests performed at application ratin
16、g conditions (other than Standard Rating Conditions). 3.7.2 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.8 Rating Conditions. Any set of operating conditions under which a single level of performance results and which causes only that level of performance to oc
17、cur. 3.8.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics. 3.9 Remote Mechanical-Draft Air-Cooled Refrigerant Condenser (Air-Cooled Condenser). A factory-made encased unit which is intended for connection in the field by means of refrige
18、rant piping, and which includes a means for forced-air circulation and elements by which heat is transferred from refrigerant to air. The purpose of this unit is to condense refrigerant vapor by rejecting heat to the air. 3.10 Saturated Condensing Temperature (Condensing Temperature). For single com
19、ponent and azeotrope refrigerants, the saturation temperature corresponding to the refrigerant pressure at the condenser entrance. For zeotropic refrigerants, the arithmetic average of the Dew Point and Bubble Point temperatures corresponding to the refrigerant pressure at the condenser entrance. 3.
20、11 “Shall“ or “Should“. “Shall“ or “Should“ shall be interpreted as follows: 3.11.1 Shall. Where “shall“ or “shall not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.11.2 Should. “Should“ is used to indicate provisions which are not mand
21、atory but which are desirable as good practice. 3.12 Standard Air. Air weighing 0.075 lb/ft31.2 kg/m3, which approximates dry air at 70F 21C and at a barometric pressure of 29.92 in Hg 101.3 kPa. 3.13 Subcooling. The difference between the saturation temperature corresponding to the liquid pressure
22、at the coil outlet and the liquid refrigerant temperature at the coil outlet, F C. 3.14 Temperature Difference (TD). The difference between the Saturated Condensing Temperature and the Entering Air Dry-Bulb Temperature, F C. 3.15 Total Heat Rejection Effect (Capacity). The rate of total heat removal
23、 from the refrigerant. This effect is equal to the product of the mass flow rate and enthalpy difference between the refrigerant vapor entering the condenser and the refrigerant liquid leaving the condenser, Btu/h W. (The Total Heat Rejection Effect, for all practical purposes, is equal to the Net R
24、efrigeration Effect in the evaporator of the system plus the heat added to the refrigerant by the refrigerant compressor.) As an alternative, this effect may be expressed in terms of its Net Refrigeration Effect for a specific system. Section 4. Test Requirements 4.1 Testing Requirements. Remote Mec
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