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ASHRAE Standard 52.2 2012

ASHRAE Standard 52.2 2012

$42.79

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

Published By Publication Date Number of Pages
ASHRAE 2012 60
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Updated guidance for testing the removal efficiency of air-cleaning devices now available! Standard 52.2-2012, which supersedes Standard 52.2-2007, establishes a laboratory test procedure for evaluating and measuring the performance of general ventilation air-cleaning devices as a function of particle size. The method of testing measures the performance of air-cleaning devices in removing particles of specific diameters as the devices become loaded by standardized loading dust fed at intervals to simulate accumulation of particles during service life. The standard defines procedures for generating the aerosols required for conducting the test and provides a method for counting airborne particles of 0.30 to 10 micrometers in diameter upstream and downstream of the air-cleaning device in order to calculate removal efficiency by particle size. This standard also establishes performance specifications for the equipment required to conduct the tests, defines methods of calculating and reporting the results obtained from the test data, and establishes a minimum efficiency reporting system that can be applied to air-cleaning devices covered by this standard.

PDF Catalog

PDF Pages PDF Title
4 FOREWORD
Description of Standard
Electronic Air Cleaners
5 Passive Electrostatic Fibrous Media Air Filters
Not an Application Standard
Acknowledgments
1. PURPOSE
2. SCOPE
3. DEFINITIONS AND ACRONYMS
6 4. TEST APPARATUS
8 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
9 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).
10 TABLE 4-1 Particle Counter(s) Size Range Boundaries
11 Figure 4-4 Critical dimensions of dust feeder assembly. Dimensions are in mm (in.).
12 Figure 4-5 Dust feeder ejector/venturi and pickup tube details. Dimensions are in mm (in.).
13 5. APPARATUS QUALIFICATION TESTING
Figure 4-6 Dust feeder venturi calibrator.
14 TABLE 5-1 System Qualification Measurement Requirements
15 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.
17 TABLE 5-2 Apparatus Maintenance Schedule
18 6. TEST MATERIALS
19 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.).
7. SELECTION AND PREPARATION OF THE TEST DEVICE
20 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.).
8. TEST PROCEDURES
9. MEASUREMENT OF RESISTANCE VerSus AIRFLOW
21 Figure 9-1 ASME long-radius flow nozzle dimensions (Reference 7).
10. DETERMINATION OF PARTICLE SIZE EFFICIENCY
Figure 9-2 Humid air density chart (Reference 2). Barometric pressure as used in this chart is the absolute pressure at the nozzle inlet.
22 Figure 10-1 Sampling sequences.
23 TABLE 10-1 t Distribution Variable (Reference 13)
26 TABLE 10-2 Size Range Groups
11. REPORTING RESULTS
27 12. MINIMUM EFFICIENCY REPORTING VALUE (MERV) FOR AIR CLEANERS
13. NORMATIVE REFERENCES
28 Figure 11-1a Typical air cleaner performance report summary.
29 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).
30 TABLE 12-1 Minimum Efficiency Reporting Value (MERV) Parameters
31 informative APPENDIX A— COMMENTARY
A1. Bend in the Test Duct
A2. Dust Loading and Minimum Efficiency Reporting
A3. Selection of the Particle Size Range
32 A4. Selection of Potassium Chloride as the Test Aerosol
A5. Round-Robin Testing
A6. APPENDIX A References
34 informative APPENDIX B— TEST PROCEDURE SUGGESTIONS AND EXAMPLES
B1. Introduction
B2. Particle Counter
B3. Aerosol Generation
Figure B-1 Schematic of the aerosol generator system.
35 B4. Aerosol Sampling System
Figure B-2 Schematic of the aerosol sampling system.
B5. Examples of Air Cleaner Efficiency Calculations
36 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).
37 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
38 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).
39 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).
40 informative APPENDIX C— HOW TO READ A TEST REPORT
C1. Background
C2. Reading a Test Report
41 Figure C-1 Sample summary air cleaner performance report, Page 1.
42 Figure C-2 Sample air cleaner performance report summary, Page 2. (a) Resistance of clean device vs. airflow. (b) PSE after incremental dust loading.
43 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).
44 informative APPENDIX D— MINIMUM EFFICIENCY REPORTING GUIDANCE
D1. General recommendations
Figure D-1 Typical minimum efficiency curves.
D2. Examples
45 D3. conclusions
46 informative APPENDIX E— CROSS-REFERENCE AND APPLICATION GUIDELINES
E1. Introduction
E2. Air Cleaner Effectiveness
47 TABLE E-1 Application Guidelines
48 informative APPENDIX F— ACRONYMS AND CONVERSION FORMULAE
F1. Acronyms
F2. Conversion Formulae
49 INformative APPENDIX G— INFORMATIVE REFERENCES
50 Informative appendix H— addenda description information
TABLE H-1 Addendum to ANSI/ASHRAE Standard 52.2-2007
51 Informative Appendix I— (Intentionally Left Blank)
52 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
53 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
54 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
55 TABLE J-1 Size Range Groups
TABLE J-2 KCl Conditioned Per Appendix J Minimum Efficiency Reporting Value (MERV-A) Parameters
56 ASHRAE Standard 52.2 Air Cleaner Performance Report Summary with Optional Conditioning Procedure According to Appendix J

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