Basic Refueling Stations | RLD CNG


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RLD CNG compressor systems meet many refueling station designs.

 Cost will depend upon several things.

1. What style of filling station do I need? Time fill vs. buffer storage vs. fast fill cascade vs. combination station will all be a different cost.

2. The amount of fuel required over what period of time will determine the style of station that you need.

3. The site conditions where the station is to be constructed and local authority requirements also have an effect on cost.

What kind of access are you going to have?

Private access would only be provided to the owner’s vehicle(s). Typically, fueling equipment is located at a central fleet depot often in a secure area requiring an access code or key to activate the dispensing equipment. No other private or public accounts have access. Private business, public utility, public transit and government work depots are examples of where public fueling is not allowed. Limited public access is usually separated by some sort of barrier. The dispenser is located in a secure area during limited hours of operation requiring a pre-approved access key or gate code, fuel card or billing code to activate. Transient customers are prohibited and cash or credit card sales are not available. This is also where a guest fleet is allowed to use a host fleet’s fueling station. Full public access is comparable to using a traditional retail gasoline or diesel station where access is unencumbered and fueling capability is open to all. This is a retail natural gas station with CNG dispensers located at traditional locations.

What type of refueling station fits your fleet?

There are no "typical" CNG fueling stations. Unlike gasoline or diesel stations, compressed natural gas stations are not "one size fits all". Building a CNG station for a retail application or a fleet requires calculating the right combination of pressure and storage needed for the time period as well as the types of vehicles being fueled. For accurate tank filling the dispensing method must be designed with a built in temperature compensation.

The following describes several different types of filling stations courtesy of the internet.

Figure 1 -

Time fill stations are used primarily by fleets (Figure 1). This is most common to fleet owners who own utility yards, school bus depots and government public work yards where vehicles are parked overnight to refuel. This configuration works great for vehicles with large tanks that refuel at a central location every night. Time fill stations can also work for small applications, such as a small station at a driver's home. At a time-fill station, a fuel line from a utility delivers fuel at a low pressure to a compressor on site. Unlike fast-fill stations, time-fill stations may have larger compressors and the vehicles are generally filled directly from the compressor rather than from fuel stored in tanks. Although there is a small buffer storage tank, its purpose is not to fill vehicles but to keep the compressor from turning off and on unnecessarily and wasting electricity.

If all or most of your vehicles return to a central location during the day for a period of hours, time fill is the most efficient and economical means of refueling. In a time fill
configuration the time filling is accomplished over an extended period, typically overnight or during slow periods in the day using a time fill post. The time it takes to fuel a vehicle depends on the number of vehicles, compressor size and the amount of buffer storage. Vehicles may take several minutes to many hours to fill. The advantage of time-fill is that the heat of re-compression 

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