EPA Method 28A Measurement Of Air-To-Fuel Ratio And Minimum Achievable Burn Rates For Wood-Fired Appliances
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ID： |
D04362B37B8B49D2AAD4ADC363E93618 |
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文件大小(MB)： |
0.03 |
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页数： |
14 |
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文件格式： |
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日期： |
2000-2-12 |
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购买： |
文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
1447,METHOD 28A - MEASUREMENT OF AIR-TO-FUEL RATIO AND MINIMUM,ACHIEVABLE BURN RATES FOR WOOD-FIRED APPLIANCES,NOTE: This method does not include all or the,specifications (e.g., equipment and supplies) and procedures,(e.g., sampling and analytical) essential to its,performance. Some material is incorporated by reference,from other methods in this part. Therefore, to obtain,reliable results, persons using this method should also have,a thorough knowledge of at least the following additional,test methods: Method 3, Method 3A, Method 5H, Method 6C, and,Method 28.,1.0 Scope and Application.,1.1 Analyte. Particulate matter (PM). No CAS number,assigned.,1.2 Applicability. This method is applicable for the,measurement of air-to-fuel ratios and minimum achievable,burn rates, for determining whether a wood-fired appliance,is an affected facility, as specified in 40 CFR 60.530.,1.3 Data Quality Objectives. Adherence to the,requirements of this method will enhance the quality of the,data obtained from air pollutant sampling methods.,2.0 Summary of Method.,2.1 A gas sample is extracted from a location in the,stack of a wood-fired appliance while the appliance is,operating at a prescribed set of conditions. The gas sample,1448,is analyzed for carbon dioxide (CO2), oxygen (O2), and,carbon monoxide (CO). These stack gas components are,measured for determining the dry molecular weight of the,exhaust gas. Total moles of exhaust gas are determined,stoichiometrically. Air-to-fuel ratio is determined by,relating the mass of dry combustion air to the mass of dry,fuel consumed.,3.0 Definitions.,Same as Method 28, Section 3.0, with the addition of,the following:,3.1 Air-to-fuel ratio means the ratio of the mass of,dry combustion air introduced into the firebox to the mass,of dry fuel consumed (grams of dry air per gram of dry wood,burned).,4.0 Interferences. [Reserved],5.0 Safety.,5.1 Disclaimer. This method may involve hazardous,materials, operations, and equipment. This test method may,not address all of the safety problems associated with its,use. It is the responsibility of the user of this test,method to establish appropriate safety and health practices,and to determine the applicability of regulatory limitations,prior to performing this test method.,6.0 Equipment and Supplies.,1449,6.1 Test Facility. Insulated Solid Pack Chimney,Platform Scale and Monitor, Test Facility Temperature,Monitor, Balance, Moisture Meter, Anemometer, Barometer,Draft Gauge, Humidity Gauge, Wood Heater Flue, and Test,Facility. Same as Method 28, Sections 6.1, 6.2, and 6.4 to,6.12, respectively.,6.2 Sampling System. Probe, Condenser, Valve, Pump,Rate Meter, Flexible Bag, Pressure Gauge, and Vacuum Gauge.,Same as Method 3, Sections 6.2.1 to 6.2.8, respectively.,Alternatively, the sampling system described in Method 5H,Section 6.1 may be used.,6.3 Exhaust Gas Analysis. Use one or both of the,following:,6.3.1 Orsat Analyzer. Same as Method 3, Section,6.1.3,6.3.2 Instrumental Analyzers. Same as Method 5H,Sections 6.1.3.4 and 6.1.3.5, for CO2 and CO analyzers,except use a CO analyzer with a range of 0 to 5 percent and,use a CO2 analyzer with a range of 0 to 5 percent. Use an,O2 analyzer capable of providing a measure of O2 in the,range of 0 to 25 percent by volume at least once every 10,minutes.,7.0 Reagents and Standards.,1450,7.1 Test Fuel and Test Fuel Spacers. Same as Method,28, Sections 7.1 and 7.2, respectively.,7.2 Cylinder Gases. For each of the three analyzers,use the same concentration as specified in Sections 7.2.1,7.2.2, and 7.2.3 of Method 6C.,8.0 Sample Collection, Preservation, Storage, and,Transport.,8.1 Wood Heater Air Supply Adjustments.,8.1.1 This section describes how dampers are to be,set or adjusted and air inlet ports closed or sealed during,Method 28A tests. The specifications in this section are,intended to ensure that affected facility determinations are,made on the facility configurations that could reasonably be,expected to be employed by the user. They are also intended,to prevent circumvention of the standard through the,addition of an air port that would often be blocked off in,actual use. These specifications are based on the,assumption that consumers will remove such items as dampers,or other closure mechanism stops if this can be done readily,with household tools; that consumers will block air inlet,passages not visible during normal operation of the,appliance using aluminum tape or parts generally available,at retail stores; and that consumers will cap off any,threaded or flanged air inlets. They also assume that air,1451,leakage around glass doors, sheet metal joints or through,inlet g……
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