1 / 18

Compressed Natural Gas Specifications for Motor Vehicles: Flexibility, Protection, and Compliance

This document discusses the proposed concept of updating the specifications for compressed natural gas (CNG) in motor vehicles. It covers the background, research needs, and presentations on the proposed concept. The aim is to provide compliance flexibility, protect existing and new technology natural gas engines, and minimize air quality degradation. Open discussion and presentations on research needs are also included.

spencerjonathan
Télécharger la présentation

Compressed Natural Gas Specifications for Motor Vehicles: Flexibility, Protection, and Compliance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Compressed Natural Gas Specifications for Motor Vehicles August 3, 2005 California Environmental Protection Agency Air Resources Board

  2. Agenda • Introductions • Background • Proposed concept • Presentations by others on proposed concept • Research needs • Presentations by others on research needs • Open discussion

  3. Background

  4. Compressed Natural Gas Motor Vehicle Fuel Regulation • Title 13, CCR, section 2292.5 adopted in 1992 • Compositional specifications • Based on technology available at that time • Provides engine manufacturers with a known fuel quality for designing engines • Addressed fuel related engine performance problems and excess emissions • More stringent than CPUC specifications for NG • Pipeline operators have imposed CNG specifications on the pipeline

  5. Current Motor VehicleCNG Specifications Methane (min.) 88 mol% Ethane (max.) 6 mol% C3+higher (max.) 3 mol% Inert Gases 1.5 - 4.5 mol% Other specs. to safeguard quality

  6. Compressed Natural Gas 88% of CA Current Supply Meets CNG MV Specifications

  7. California Associated Gas • Predominately in the Southern San Joaquin Valley and the South Central Coast • Exceed ethane, C3+ specifications • Higher energy content

  8. Potential for Imported LNG • Potential to displace a significant amount of CA natural gas supply • Potentially exceeds ethane, and C3+ specifications • Does not meet inert specifications • Higher energy content

  9. Modifications of CNG MV Specifications • CNG specifications could be updated • reflect vehicle technology advancements • provide flexibility • Need to balance cost with air quality and vehicle performance issues • Optional • Preserve performance and emission benefits

  10. Fuel Quality and Emissions • Test programs confirm that an increase in energy content will increase NOx emissions • Stationary sources • Mobile sources • Current information indicates that NOx emission increases may be significant • Additional tests need to be conducted to fully quantify the performance and emissions impacts

  11. Fuel Effects on Performance and Durability • Light duty engines are equipped with advanced feedback control systems and do not experience any significant effects • Heavy duty engines without advanced feedback control systems can experience significant performance and durability effects • Stationary applications can experience modified flame and combustion characteristics that can affect performance and durability

  12. Proposed Concept

  13. Proposed Concept Objectives • Provide compliance flexibility with CNG fuel regulation • Ensure protection of existing and new technology natural gas engines • No significant air quality degradation occurs

  14. Proposed Concept • Methane Number • 80 statewide • 73 regional • WOBBE Index • xxxx statewide • xxxx regional • Inerts 4% max. • C4+ 1.5% max. • Other specifications based on CPUC Rule 30 or Rule 21

  15. Presentations by Others on Proposed Concept

  16. Research Needs

  17. Presentations by Others on Research Needs

  18. Open Discussion

More Related