1.Advantages of CNG
Under normal temperature and high pressure (20~25MPa), the quality of natural gas with the same volume is about 270~300 times larger than that under high pressure conditions, which can greatly improve the storage and transportation volume of natural gas and make the utilization of natural gas more convenient. Nowadays, CNG is widely used in transportation, urban gas and industrial production.
Currently, both at home and abroad are vigorously developing alternative automotive vehicle fuels, and the practical applications include compressed natural gas (CNG), liquefied natural gas (LNG), liquefied petroleum gas (LPG), methanol, ethanol and electric energy.
2.Classification of CNG Station
At present, the classification of CNG stations is not unified yet. According to the purpose of gas supply, it can be generally divided into pressurization station, gas supply station and gas filling station; According to the function setting, it can be divided into single-function station, dual-function station and multi-function station; According to different affiliation, it can be divided into independent station and chain station.
3.CNG Station Process
The basic functions of CNG station are natural gas receiving (incoming pressure regulation and metering), processing, compression, supply (including storage, gas filling supply and decompression supply), etc. LPG and LNG stations are usually included, but the in-station process flow is different from that in CNG stations. According to the different gas supply purposes of CNG stations, the following are the process flow diagrams of various CNG stations:
