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ASHRAE Standard 145.1 Laboratory Test Method for Assessing the Performance of Gas-Phase Air-Cleaning Systems: Loose Granular Media (ANSI/ASHRAE Approved) >
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ASHRAE Standard 145.1 Laboratory Test Method for Assessing the Performance of Gas-Phase Air-Cleaning Systems: Loose Granular Media (ANSI/ASHRAE Approved), 2008
- FOREWORD
- 1. PURPOSE
- 2. SCOPE
- 2.1 This standard prescribes a small-scale laboratory test method for measuring the contaminant removal efficiency of loose granular sorptive media used in gas-phase air-cleaning equipment as installed (in a test apparatus) in an airstream and challe...
- 2.2 This standard defines methods of calculating and reporting results obtained from the test data and establishes a results reporting system that can be applied to loose granular media covered by this standard.
- 2.3 This standard does not apply to
- 3. DEFINITIONS AND ACRONYMS
- 3.1 Definitions. Some terms are defined here for the purposes of this standard. When definitions are not provided, refer either to ASHRAE Terminology of HVAC&R1 or to ASTM’s Standard Terminology Relating to Activated Carbon.2 Otherwise, common usag...
- 3.2 Acronyms
- 4. TEST APPARATUS AND MATERIALS
- 4.1 The apparatus to hold the media shall utilize a column constructed of a nonreactive material of sufficient strength to contain the operating pressure of the system. The column may be used with or without a water jacket depending on the temperatur...
- 4.2 Equipment Capability Requirements
- 4.3 Method Detection Limits. The lower detection limit shall be less than or equal to 1% of the challenge gas concentration.
- 5. TEST PROCEDURE
- 5.1 Summary of the Test Method. A specific volume (50 cc) of media is exposed to a known concentration of contaminant gas(es) at a volume flow in a tempered, humidified, supply airstream. The inlet and outlet challenge gas concentrations are measured...
- 5.2 Safety Precautions. The use of chemical gases that are potentially toxic dictates adherence to strict safety guidelines applicable to their use. All persons with access to these materials must be informed of these guidelines and of those hazards ...
- 5.3 Sampling. Whenever possible, bulk media samples shall be obtained from unopened, original manufacturer’s shipping containers chosen at random from stock. Lot number(s), manufacturing date(s), etc. should be recorded if available. The entire med...
- 5.4 Test Sequence. The steps in the test sequence are as follows in Sections 5.4.1 through 5.4.10.
- 6. TEST PARAMETERS
- 6.1 The test airflow rate shall be that necessary to achieve a residence time of 0.1 ± 0.01 seconds. Airflow rate and volume for this test shall be determined by the following equation:
- 6.2 The test air temperature shall be 23°C ± 2°C (75°F ± 4°F) at a relative humidity of 50% ± 5%.
- 6.3 Challenge gases shall be the acid gas challenge group listed in Section 6.3.1 and the volatile organic compound (VOC) challenge group listed in Section 6.3.2. Single challenge gases not listed in either the acid gas or VOC challenge groups may be...
- 7. DATA ANALYSIS
- 7.1 Removal Efficiency. The removal efficiency, Et, at time t is determined by the following equation:
- 7.2 Penetration. The penetration (in %) at time t is determined as follows:
- 7.3 Capacity for Removal. The capacity for removal in mass%, Cr, is expressed by:
- 7.4 Recommended Procedure for Uncertainty Evaluation of Calculated Parameters
- 7.5 Summary of Recommended Procedure
- 8. DATA QUALITY CONTROL
- 8.1 Run each sample in replicate. Sequential or simultaneous replicate samples shall agree within ±10% of the mean of the individual times (in minutes) to 50% breakthrough to satisfy the requirements of this standard.
- 8.2 Each gas analyzer used should be calibrated according to the manufacturer’s recommendation. At a minimum this should include a five-point concentration calibration spanning the lowest expected concentration to the highest expected concentration...
- 8.3 Gas flow controllers or flowmeters should be calibrated according to the manufacturer’s recommendation; at a minimum this should be done every six months or after any repair or modification.
- 8.4 Temperature and relative humidity measurement devices should be calibrated according to the manufacturer’s recommendation. At a minimum a calibration should be performed at least annually for temperature measurement devices and at least every s...
- 8.5 A recommended quality assurance and quality control outline is provided in this section. All quality documents and documentation referenced in this outline shall be made available upon request and shall be available for a period of not less than ...
- Quality Assurance
- Quality Control
- Quality Assessment
- Bibliography for QA/QC
- 9. REPORTING RESULTS
- ASHRAE STANDARD 145.1
- Gas-Phase Air Filtration Media Performance Report Page 1 of _____
- LABORATORY DATA
- MEDIA SAMPLE DATA
- SAMPLE PRECONDITIONING
- STANDARD TEST CONDITIONS
- ASHRAE STANDARD 145.1
- Gas-Phase Air Filtration Media Performance Report Page 2 of _____
- ASHRAE STANDARD 145.1
- Gas-Phase Air Filtration Media Performance Report Page 3 of _____
- Certificate of Compliance (provided by testing laboratory)
- 10. REFERENCES
- INFORMATIVE ANNEX A BIBLIOGRAPHY
- INFORMATIVE ANNEX B SELECTION AND GENERATION OF CHALLENGE GASES
- INFORMATIVE ANNEX C SUMMARY OF GAS MONITORING METHODOLOGIES
- NORMATIVE ANNEX D REPORT AND INTERPRETATION OF RESULTS [Go to Page]