The on-board storage capacity of naturla gas vehicles (NGV) defines the dirving range allowable before refueling is requried.underfilling of NGV gas storage cylinders,during fast fill (< 5 minute) charging operations,can occur at fueling stations haivn gdispensers which incorrectly or inaccurately compensate for initial cylinder pressure and temperature,station supply gas pressure and temperature,ambient temperature,and the heat of compression in the storage cylinders during filling.
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