A Comparative Analysis of Liquefied Natural Gas (LNG) and Compressed Natural Gas (CNG) in Two Texas Transit Agencies
Naomi W. Ledé, Texas Southern University, September 1997, 78 pp. (60051-1)
This study is a detailed comparative analysis of liquefied natural gas (LNG) and compressed natural gas (CNG). The study provides data on two alternative fuels used by transit agencies in Texas. First, we examine the “state-of-the-art” in alternative fuels to establish a framework for the study. Efforts were made to examine selected characteristics of two types of natural gas demonstrations in terms of the following properties: energy source characteristics, vehicle performance and emissions, operations, maintenance, reliability, safety costs, and fuel availability. Where feasible, two alternative fuels were compared with conventional gasoline and diesel fuel. Environmental considerations relative to fuel distribution and use are analyzed, with a focus on examining flammability an other safety-related issues.
The objectives of the study included: (1) assess the state-of-the-art and document relevant findings pertaining to alternative fuels; (2) analyze and synthesize existing databases on two natural gas alternatives: liquefied natural gas (LNG) and compressed natural gas (CNG); and (3) compare two alternative fuels used by transit properties in Texas, and address selected aspects of alternative fuels such as energy source characteristics, vehicle performance and emissions, safety, costs, maintenance and operations, environmental and related issues.
A profile of two alternative fuels used by Texas transit agencies is presented. The comparisons made about properties of LNG and CNG provide a context within which an assessment of other alternative fuels such as methanol, ethanol, electric vehicles can be made.
The findings of the study will contribute to existing evidence on alternative fuels. Data included in the study will be useful to transportation industry officials in the public and private sector. Comparative data on alternative fuels will contribute to a greater understanding of their use and enhance policy decisions about alternative fuels.
Keywords: Liquefied Natural Gas (LNG), Compressed Natural Gas (CNG), Alternative Fuels, Clean Air Act Amendments, Energy, Emissions
ENTIRE REPORT (Adobe Acrobat File – 5.4 MB)