Page 56 - SD_NG_BC

50 Downstream Natural Gas Copyright © 2014 by SDTC ™

13 Glossary

Bi-Fuel Vehicle

– a vehicle capacity of running on two different fuels. For example, a vehicle capacity of running on gasoline and natural gas.

Biogas

– a methane containing gas produced from the decomposition of biomass in landfills, digesters, and wastewater plants.

Combined Heat and Power (CHP)

– the use of a heat engine or power station to simultaneously generate electricity and useful heat or steam.

Compressed Natural Gas (CNG)

– natural gas that has been compressed to a pressure of 3,000 to 3,600 psi.

CO 2 Equivalent (CO 2 e)

– The products of the volume of fuel consumed, the constituent emission factor, and constituent global warming potential, summed to represent a carbon dioxide equivalent impact value.

Criteria Air Contaminant (CAC)

– air pollutants that cause smog, acid rain, and other environmental and human health hazards. CACs quantified in this report include nitrogen oxides (NO x ), sulfur oxides (SO x ), particulate matter (PM), volatile organic compounds (VOCs), and carbon monoxide (CO).

Emission Factor

– The average mass of a product of combustion emitted from the combustion of a fuel per volume of fuel consumed (g/L or kg/L).

Greenhouse Gas (GHG)

– a gas in the atmosphere that contributes to the greenhouse effect by absorbing infrared radiation.

Greenhouse gases quantified in this report include carbon dioxide (CO 2 ), methane (CH4), and nitrous oxide (N 2 O).

Heavy Duty Vehicle (HDV)

– class 2b to 8b vehicles with a gross vehicle weight ranging from 3.9 tonnes to greater than 27 tonnes. In this report HDVs have been further classified as Light (LHDV), Medium (MHDV), and Heavy Duty (HHDV). Light HDVs are class 2b to 5 vehicles with a gross vehicle weight ranging from 3.9 to 8.8 tonnes. Medium HDVs are class 6 and 7 vehicles with a gross vehicle weight ranging from 8.8 to 15 tonnes. Heavy HDVs are class 8a and 8b vehicles with a gross vehicle weight greater than 15 tonnes.

Life Cycle Assessment (LCA)

– a technique used to assess the environmental impacts associated with all stages of a product`s or process`s life from cradle to grave, including raw material extraction, materials processing, manufacture, distribution, use, repair and maintenance, and final disposal or recycling.

Light Duty Vehicle (LDV)

– class 1 and 2 vehicles with a gross vehicle weight of up to 3.9 tonnes.

Liquefied Natural Gas (LNG)

– natural gas in liquid form, made by compressing and cooling natural gas to around -162˚C.

Natural Gas Vehicle (NGV)

– an alternative fuel vehicle that uses CNG or LNG as the primary fuel.

Renewable Natural Gas (RNG)

– biogas that has been upgraded to the quality of saleable natural gas through a purification process.