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eLibrary > ANSI/ASHRAE Standard 52.2 Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size >

ANSI/ASHRAE Standard 52.2 Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size, 2012

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ANSI/ASHRAE Standard 52.2 Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size, 2012

52_2_2012_text.pdf [Go to Page]
FOREWORD [Go to Page]
Description of Standard
Electronic Air Cleaners
Passive Electrostatic Fibrous Media Air Filters
Not an Application Standard
Acknowledgments
1. PURPOSE
2. SCOPE
3. DEFINITIONS AND ACRONYMS
4. TEST APPARATUS [Go to Page]
Figure 4-1 Schematic of the test duct (notes and legend are below). Dimensions are in mm (in.).
LEGEND FOR FIGURES 4-1 and 4-2d
Figure 4-2 Details of test duct components. Dimensions are in mm (in.).
(a) Mixing orifice.
(b) Static tap.
(c) Perforated plate with a sufficient number of equally spaced holes to provide 40% open area.
(d) Static tap locations.
Figure 4-3 Dimensions are in mm (in.).
(a) Transition: test air cleaner dimensions smaller than test duct (asymmetrical dimensions are allowed).
(b) Transition: test air cleaner dimensions larger than test duct (asymmetrical dimensions are allowed).
(c) Allowable special duct section for nonrigid air cleaners (must be symmetrical).
TABLE 4-1 Particle Counter(s) Size Range Boundaries
Figure 4-4 Critical dimensions of dust feeder assembly. Dimensions are in mm (in.).
Figure 4-5 Dust feeder ejector/venturi and pickup tube details. Dimensions are in mm (in.).
5. APPARATUS QUALIFICATION TESTING [Go to Page]
Figure 4-6 Dust feeder venturi calibrator.
TABLE 5-1 System Qualification Measurement Requirements
Figure 5-1 Sampling grid with nine equal-area points for measuring the uniformity of air velocity and aerosol dispersion.
Figure 5-2 Injection grid with nine points to assess downstream mixing. Perimeter points are 25 mm (1 in.) from duct wall.
TABLE 5-2 Apparatus Maintenance Schedule
6. TEST MATERIALS [Go to Page]
Figure 6-1 Allowable form of a loading dust blender. Dimensions are in mm (in.).
Figure 6-2 Final filter: flat sheet media form. Dimensions are in mm (in.).
Figure 6-3 Final filter: pleated, replaceable media form. Dimensions are in mm (in.).
Figure 6-4 Final filter: cartridge form. Dimensions are in mm (in.).
7. SELECTION AND PREPARATION OF THE TEST DEVICE
8. TEST PROCEDURES
9. MEASUREMENT OF RESISTANCE VerSus AIRFLOW [Go to Page]
Figure 9-1 ASME long-radius flow nozzle dimensions (Reference 7).
10. DETERMINATION OF PARTICLE SIZE EFFICIENCY [Go to Page]
Figure 9-2 Humid air density chart (Reference 2). Barometric pressure as used in this chart is the absolute pressure at the nozzle inlet.
Figure 10-1 Sampling sequences.
TABLE 10-1 t Distribution Variable (Reference 13)
TABLE 10-2 Size Range Groups
11. REPORTING RESULTS [Go to Page]
Figure 11-1a Typical air cleaner performance report summary.
12. MINIMUM EFFICIENCY REPORTING VALUE (MERV) FOR AIR CLEANERS [Go to Page]
Figure 11-1b Airflow rate vs. resistance of clean device. Illustration is for an air cleaner with a test airflow rate of 0.93 m3/s (1970 cfm).
TABLE 12-1 Minimum Efficiency Reporting Value (MERV) Parameters
13. NORMATIVE REFERENCES
informative APPENDIX A— COMMENTARY
A1. Bend in the Test Duct
A2. Dust Loading and Minimum Efficiency Reporting
A3. Selection of the Particle Size Range
A4. Selection of Potassium Chloride as the Test Aerosol
A5. Round-Robin Testing
A6. APPENDIX A References
informative APPENDIX B— TEST PROCEDURE SUGGESTIONS AND EXAMPLES
B1. Introduction
B2. Particle Counter
B3. Aerosol Generation [Go to Page]
Figure B-1 Schematic of the aerosol generator system.
B4. Aerosol Sampling System [Go to Page]
Figure B-2 Schematic of the aerosol sampling system.
B5. Examples of Air Cleaner Efficiency Calculations [Go to Page]
Figure B-3 Example correlation calculations for n = 9 sample sets in all particle size ranges. From run 1 of 5, 100% penetration test, ASHRAE RP-671 (Reference A1).
Figure B-4 Example correlation calculation for one particle size range with error evaluation at each step. From run 1 of 5, size range 1, 100% penetration tests, ASHRAE RP-671 (Reference A1).
B6. Test Sequence [Go to Page]
Figure B-5 Example penetration calculations for n = 9 sample sets in all particle size ranges. From run 1 of 3, pleated paper filter tests, ASHRAE RP-671 (Reference A1).
Figure B-6 Example penetration calculation for one particle size range with error evaluation at each step, where do = 0.017 and R = 0.992. From run 1 of 3, size range 1, pleated paper filter tests, ASHRAE RP-671 (Reference A1).
informative APPENDIX C— HOW TO READ A TEST REPORT
C1. Background
C2. Reading a Test Report [Go to Page]
Figure C-1 Sample summary air cleaner performance report, Page 1.
Figure C-2 Sample air cleaner performance report summary, Page 2. (a) Resistance of clean device vs. airflow. (b) PSE after incremental dust loading.
Figure C-3 Sample air cleaner performance report summary, Page 3. —Composite minimum efficiency curve.
Figure C-4 Sample air-cleaner report summary, Page 3. —Resistance vs. Synthetic Loading Dust Fed graph ONLY for air-cleaning devices with efficiencies less than 20% in the size range of 3.0–10.0 mm).
informative APPENDIX D— MINIMUM EFFICIENCY REPORTING GUIDANCE
D1. General recommendations [Go to Page]
Figure D-1 Typical minimum efficiency curves.
D2. Examples
D3. conclusions
informative APPENDIX E— CROSS-REFERENCE AND APPLICATION GUIDELINES
E1. Introduction
E2. Air Cleaner Effectiveness [Go to Page]
TABLE E-1 Application Guidelines
informative APPENDIX F— ACRONYMS AND CONVERSION FORMULAE
F1. Acronyms
F2. Conversion Formulae
INformative APPENDIX G— INFORMATIVE REFERENCES
Informative appendix H— addenda description information [Go to Page]
TABLE H-1 Addendum to ANSI/ASHRAE Standard 52.2-2007
Informative Appendix I— (Intentionally Left Blank)
INFORMATIVE APPENDIX J— OPTIONAL METHOD OF CONDITIONING A FILTER USING FINE KCl PARTICLES TO DEMONSTRATE EFFICIENCY LOSS THAT MIGHT BE REALIZED IN FIELD APPLICATIONS
J1. Purpose of Optional Test
J2. Definitions and Acronyms
J3. Test Apparatus for Conditioning Aerosol in Addition to the Test Apparatus Required in Section 4 of the Standard
J4. Subsection to be Used with Section 5.1 of the Standard
J5. Subsection to be Used with Section 5 of the Standard
J6. Subsection to be Used with Table 5-1, System Qualification Measurement Requirements of the standard
J7. Subsection to be Used with Table 5-2, Apparatus Maintenance Schedule of the Standard
J8. Subsection to be Used with Section 6, Test Materials, of the Standard
J9. Subsection to be Used with Section 8.2, Test Procedures, of the Standard
J10. Conditioning Procedure (Use this procedure instead of Section 10.7.1.2.b of the standard)
J11. Subsection to be Used with Section 11.2 of the Standard [Go to Page]
TABLE J-1 Size Range Groups
TABLE J-2 KCl Conditioned Per Appendix J Minimum Efficiency Reporting Value (MERV-A) Parameters
ASHRAE Standard 52.2 Air Cleaner Performance Report Summary with Optional Conditioning Procedure According to Appendix J [Go to Page]

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ANSI/ASHRAE Standard 52.2 Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size, 2012

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