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Natural Gas Vehicle Fuel Survey.
| 题名： | Natural Gas Vehicle Fuel Survey. |
| 作者： | George, D. L.; Poerner, N. W.; Ridens, B. L.; Thorson, J. L. |
| 关键词： | Compressed Natural Gas; Diluents; Fuels; Heating Values; Natural Gas; Pipelines; Specific Gravy; Sulfur Compounds; Surveys; Vehicles; Water Vapor; Wobble Index |
| 摘要： | The goals of this project were to provide the Coordinating Research Council with data on natural gas quality at transmission pipelines, local distribution company pipelines, and CNG dispensers, and to provide CRC with an understanding of any geographic variations in natural gas components and parameters affecting NGV performance. To understand long-term historical trends in pipeline gas quality, literature searches were performed for appropriate data using SwRI Library resources and online search engines. The most recent published report on nationwide pipeline natural gas compositions was 20 years old. Results of a ten-year-old unpublished survey of nationwide gas quality were also found, but more recent data were found describing gas composition variations within state boundaries. Data were also collected from transmission and distribution companies that post daily gas composition data on public-access websites for use in custody transactions. A subset of online data representing several regions of the country was analyzed for short-term changes in pipeline gas quality. Parameters affecting NGV performance were computed from the gas compositions and analyzed for variations in time and for differences between regions of the country. SwRI staff visited a total of 23 CNG stations across the country to gather samples and collect data. Station operators were surveyed to gather data on equipment configurations, known quality issues with gas entering the station, station throughput, and customer feedback on vehicle performance. Portable moisture analyzers were used to directly measure moisture levels in the natural gas supplies entering the CNG stations and in the dispensed CNG. Finally, gas and liquid samples were collected from the station dispensers and sent to laboratories for analysis. The gas samples were analyzed by an offsite laboratory using ASTM methods to quantify hydrocarbons, sulfur compounds, and diluent (non-burning) components. The liquid samples were retu |
| 报告类型： | 科技报告 |
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