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SRI/USEPA-GHG-VR-27 September 2003 9 8 7 6 5 4 3 2 1 Current THD Voltage THD 0 Extended Monitoring Period (14 days) Figure 2-9. Capstone 60 Current and Voltage THD During Extended Test Period 2.3. EMISSIONS PERFORMANCE 2.3.1. CHP System Stack Exhaust Emissions CHP System emissions testing was conducted to determine emission rates for NOX, criteria pollutants (CO and THC), and greenhouse gases (CO2 and CH4). Stack emission measurements were conducted during each of the controlled test periods summarized in Table 1-3. Three replicate test runs were conducted at each operating condition each approximately 30 minutes in duration. All testing was conducted in accordance with the EPA reference methods listed in Table 1-4. The CHP system was maintained in a stable mode of operation during each test run using PTC-22 variability criteria. Emissions results are reported in units of parts per million volume dry, corrected to 15-percent O2 (ppmvd at 15-percent O2) for NOX, CO, and THC. Emissions of CO2 are reported in units of volume percent. These concentration and volume percent data were converted to mass emission rates using computed exhaust stack flow rates following EPA Method 19 procedures and are reported in units of pounds per hour (lb/hr). The emission rates are also reported in units of pounds per kilowatt hour electrical output (lb/kWhe). They were computed by dividing the mass emission rate by the electrical power generated. Sampling system QA/QC checks were conducted in accordance with Test Plan specifications to ensure the collection of adequate and accurate emissions data. These included analyzer linearity tests and sampling system bias and drift checks. Results of the QA/QC checks are discussed in Section 3. The 2-12 5-minute Average THD (%)PDF Image | Environmental Technology Verification Report
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