A liquefied-compressed natural gas (LCNG) station combines LNG and CNG in one station. A typical LCNG station is supplied with LNG and has dispensers for both LNG and CNG vehicles. Like an LNG refueling station, an LCNG station relies on a local LNG supply that can be delivered by tanker truck, similar to diesel and gasoline. The advantage of an LCNG station is that it can offer both LNG and CNG. This type of station can also be set up in areas where there is no local natural gas distribution.
At an LCNG station, LNG vehicles are fueled in the same way as at an LNG station with a cryogenic pump moving the LNG from an insulated storage vessel through a dispenser into the vehicle. To produce CNG, the LNG is pumped into a vaporizer that converts it from liquid to gas in a controlled way so that it can be dispensed at the right pressure as CNG.
- Storage vessel – tanker truck delivers LNG to storage vessel
- Cryogenic pump – moves LNG from storage to dispenser and vaporizer
- Vaporizer – converts LNG to gas and controls pressure to dispense it as CNG
- Dispenser – both LNG and CNG dispensers
Investment and maintenance costs for an LCNG station are lower than the costs of setting up separate stations for CNG and LNG. Power consumption to produce CNG is also significantly lower than at a typical compressor-based CNG station. At present, there are no LCNG refueling stations in Canada.