Within any CNG fueling system, the natural gas compressors are the components that transform ordinary, low-pressure gas into a high-power vehicular fuel.
There are several types of gas compressors, most being classified as Positive Displacement compressors. This category of compressors can be broken down into two main types:
Reciprocating – Includes single-acting and double-acting designs, as well as diaphragm compressors
Rotary – Includes lesser used types such as scroll, screw and liquid ring compressors
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Natural gas enters the CNG equipment from the inlet line (also called a suction line) provided by the local gas utility. The first piece of equipment used in the process of producing CNG is the gas dryer. Pipeline gas often contains moisture and other impurities. Excessive moisture can affect the operation of the CNG compressors and even your vehicles, so it is important to use a dryer to ‘clean’ the gas to provide high quality fuel.
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In the wake of the largest oil spill in American history, Time Magazine asked:
“What's the quickest path to achieving a future in which the U.S. is no longer held hostage by foreign oil and carbon emissions are sharply curtailed?”
For many energy experts, the answer is natural gas.
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San Diego Metropolitan Transit System (MTS), the largest user of CNG in San Diego County, awarded Trillium a contract for capital upgrades to its three CNG fueling stations and a contract for 10 years of Operations and Maintenance services (O&M) at the same locations. MTS currently has 407 CNG buses in operation, approximately 75% of the entire fleet.
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The Emissions ERIG program offers an incredible opportunity for transit and heavy-duty fleets to upgrade not only their outdated diesel vehicles, but receive funding assistance in developing CNG fueling infrastructure and long-term emissions reduction plans.
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