The main advantage of the filling points is the market-oriented placement, taking into consideration traffic conditions when positioning. It can be placed there and at a density, even on a temporary basis, where expected traffic requires it. This is the main different to the regular CNG compressor technologies, where the main location is specified by the pipeline availability.
For having this freedom of running the filling point, the solution is the so-called LCNG technology, what is Liquefied-to-Compressed-Natural-Gas. The gas is delivered and stored to the filling point in the form of the cryogenic (liquefied) form of natural gas.
At the event of vehicle user comes to the filling point, it’s vehicle will be filled up rapidly from the pre-stored high pressure compressed gas bottles. These bottles are filled up from the LNG tank, through an extremely high-pressure ambient heat exchanger, which vaporize the fluid, increase it’s temperature to the ambient level and in the same time increase it’s pressure till the storing level. From the tank to the vaporizer a pump is elevating the LNG and supporting the required capacity of CNG production.
The Clean Fuel Box is able to refill a personal car with 10 kg of CNG within 60 seconds, this is usually enough to around 250 kms to drive. If the vehicle and it’s tank is bigger, even 20 kilos are not taking more than 150 seconds, thanks to the pre-stored gas.
In the basic system, the CFB has an LNG storage of about 3,7 t, means up to 4000 cubic meter can be dispensed between refilling events. The needs of refill observed by the dispatcher and can ascertain the right time. The refill process, thanks to the developed feeder vehicle, can be done about 15 minutes, so the pause in sales not hold back disturbingly long. The feeder vehicle can distribute the LNG from the nearest LNG station, increasing the speed of the LNG consumption there.
The Clean Fuel Box is a prefabricated and carefully tested product, which enable a self-service CNG vehicle fueling. It contains the dispenser and a payment unit and of course a sophisticated control system with all kind of detecting systems for safe and reliable operation.
To supervise and refill them, a network of operators with a central dispatcher service and a “smart computing” system will be established.