MOTHER AND DAUGHTER STATIONS
Where gas pipelines are not present, CNG is delivered continuously through a network of stations not connected to pipelines (called Daughter Stations).
CNG trailers are filled in a fast CNG station (called Mother Station) preferably connected to a high pressure pipeline.
The advantages are:
Daughter Stations: maximum re-compression efficiencyIn the daughter station gas is delivered to vehicles by means of a compressor connected directly to the trailer or to a local storage.
SAFE have solution for high efficiency of daughter station by using different type of compressors:
- Hydraulic compressor “B” series – one hydraulic compressor, with a maximum installed power of 37 kW, is suitable for 2 double nozzle dispensers
- Mechanical compressor - ST compressor series are used where very high capacity is required (suitable to fill up to 4 double nozzle dispensers) and/or when in the future, the connection to the pipeline is forseen
Hydraulic compressor or mechanical booster compressor can be equipped with gas driver instead of electric motor suitable to be install on the trailer. In this configuration, with one or more filling point integrated in the same compressor enclosure or in a compact tailer-made dispenser, a mobile station achieved.
The results are: