PDF Publication Title:
Text from PDF Page: 062
SRI/USEPA-GHG-VR-27 September 2003 Duplicate analyses, in addition to the blind audit samples, were conducted on two of the samples collected during the control test periods (the sample collected during Runs 1 and 18). Duplicate analysis is defined as the analysis performed by the same operating procedure and using the same instrument for a given sample volume. Results of the duplicate analyses showed an average analytical repeatability of 0.07 percent for methane and 0.09 percent for LHV. The results demonstrate that the ± 0.2 percent LHV accuracy goal was achieved. 3.2.3. Heat Recovery Rate and Efficiency Several measurements were conducted to determine CHP system heat-recovery rate and thermal efficiency. These measurements include PG fluid flow rate, fluid supply and return temperatures, fluid composition, and CHP system heat input. The individual errors in each of the measurements is then propagated to determine the overall error in heat-recovery rate and efficiency. The Onicon Model F-1110 turbine meter was used to continuously monitor PG fluid flow rate. This meter has a NIST-traceable factory-calibrated accuracy of ± 0.1 percent of reading (the calibration was conducted on June 11, 2002). This certification serves as the primary DQI. An additional field check on the meter included the GHG Center comparing readings from the Onicon turbine meter to fluid flow readings generated by the GHG Center's Controlotron ultrasonic meter. The two meters agreed within 0.2 percent of reading while operating the CHP system at full load. A zero check was also performed on the turbine meter. The turbine meter reading was -0.06 gpm with the CHP system shut down and the circulation pump off. Tables 3-2 and 3-3 showed that the DQI for supply and return temperatures (delta T) was achieved. The error in the fluid supply and return temperatures were 0.4 and 0.5 oF, respectively, for an overall delta T uncertainty of 0.9 oF. This absolute error equates to a relative error of 0.5 percent at the highest average fluid temperatures measured during the full-load testing. To address concerns regarding the amount of insulation surrounding the GHG Center's surface-mounted RTDs, an additional QC check was conducted. The facility uses a calibrated set of thermocouples immersed into thermowells in each glycol line to monitor delta T. A total of 12 one-minute average delta T readings were recorded for the two sets of temperature sensors to obtain delta T comparisons over a PG-supply temperature range of 104 to 183 oF. The average absolute difference between the two RTD sets was 0.25 oF. This indicates that the thermal paste used as a surface contact medium, along with the insulation that was used, was sufficient to provide reliable delta T data. The error in the glycol analysis was determined to be 3.6 percent based on results of the blind audit sample. This analytical error translates to uncertainties in the fluid density and specific heat equal to 0.21 percent (see Test Plan Section 3.2.5). The 3.6 percent error exceeds the DQI goal of 3.0 percent, but the composite error in heat recovery rate is still well within the DQO goal for that parameter. The overall error in heat recovery rate is then the combined error in PG temperature, flow rate, and compositional measurements. This error compounds multiplicatively as follows: Overall Heat Meter Error = (Flowrateerror)2 +(compositional error)2 +(temperatureerror)2 (Eqn. 10) = (0.0010)2 + (0.0021) 2 + (0.005)2 = 0.0055 The heat recovery rate determination, therefore, has a relative compounded error of ± 0.55 percent. 3-10PDF Image | Environmental Technology Verification Report
PDF Search Title:
Environmental Technology Verification ReportOriginal File Name Searched:
Capstone-ETV-Report.pdfDIY PDF Search: Google It | Yahoo | Bing
Capstone Turbine and Microturbine: Capstone microturbines used and new surplus for sale listing More Info
Consulting and Strategy Services: Need help with Capstone Turbine, sizing systems, applications, or renewable energy strategy, we are here to assist More Info
Container Lumber Dry Kiln: Since 1991 developing and innovating dry kilns using standard shipping containers More Info
Supercritical CO2 Lumber Dry Kiln: Compact fast drying in 3 days or less for small amounts of wood and lumber drying More Info
BitCoin Mining: Bitcoin Mining and Cryptocurrency... More Info
Publications: Capstone Turbine publications for microturbine and distributed energy More Info
FileMaker Software for Renewable Energy Developing database software for the renewable energy industry More Info
CO2 Gas to Liquids On-Demand Production Cart Developing a supercritical CO2 to alcohol on-demand production system (via Nafion reverse fuel cell) More Info
Stranded Gas for low cost power Bitcoin Mining Using stranded gas for generators may provide breakthrough low power costs for cryptocurrency miners. More Info
CONTACT TEL: 608-238-6001 Email: greg@globalmicroturbine.com (Standard Web Page)