Refueling Systems: Fast-Fill and Slow-Fill
The fast-fill refueling system operates in a manner essentially identical to that of a standard fuel dispenser; a typical refueling process takes between 1 and 3 minutes and features both a display screen and a metering device.
The slow-fill method involves refueling vehicles during extended periods of downtime (e.g., overnight or between shifts). During this time, a compressor simultaneously refuels all vehicles; this method does not utilize gas storage vessels or sequential filling control mechanisms. It requires lower capital investment-as there is no need to install gas storage vessels-and allows for the use of a compressor with a significantly lower discharge capacity.
Types of Refueling Equipment: Fast-Fill Dispensers and Refueling Posts
A fast-fill dispenser comprises metering instrumentation, a sequential filling control unit, a display unit, a temperature compensation unit, and a complete set of connection hardware (including hoses, breakaway couplings, and refueling nozzles).
Refueling posts serve two primary functions:
(1) As they do not require complex calculations or sequential filling controls, they can serve as a cost-effective alternative to standard fast-fill dispensers.
(2) They are also well-suited for slow-fill systems where each individual vehicle requires its own dedicated refueling point.
