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L/CNG - Refueling Systems

Idaho National Laboratory

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Technology Marketing Summary

INL has developed a LNG/CNG refueling process and method for dispensing liquefied natural gas (LNG), compressed natural gas (CNG) or both on demand. The process utilizes CNG as a source of LNG, and is stored in a cryogenic storage vessel on site. A low volume high pressure pump is coupled to the source of LNG to produce a stream of pressurized LNG that can be selectively directed through a LNG or CNG flow path, which may include a vaporizer to produce CNG from the pressurized LNG. The fueling station configuration is flexible so the LNG to CNG conversion process can be located several hundred feet away and may be connected to the dispensing device by way of underground pipe.

Description

The fueling station can be configured in a way that passive cooling is possible, meaning that the pumps don’t need to be continually operating in order to circulate the LNG through its flow paths. Sensors will be used to regulate the temperatures of the different flow path so that LNG and CNG will be periodically mixed so as to keep the gases at their correct required temperature.

Benefits

-      Delivers low cost alternative for refueling CNG and LNG vehicles.

Applications and Industries

Liquid natural gas, compressed natural gas, alternative fuel station

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 6,899,146
Patent
6,899,146
Method and apparatus for dispensing compressed natural gas and liquified natural gas to natural gas powered vehicles
A fueling facility and method for dispensing liquid natural gas (LNG), compressed natural gas (CNG) or both on-demand. The fueling facility may include a source of LNG, such as cryogenic storage vessel. A low volume high pressure pump is coupled to the source of LNG to produce a stream of pressurized LNG. The stream of pressurized LNG may be selectively directed through an LNG flow path or to a CNG flow path which includes a vaporizer configured to produce CNG from the pressurized LNG. A portion of the CNG may be drawn from the CNG flow path and introduced into the CNG flow path to control the temperature of LNG flowing therethrough. Similarly, a portion of the LNG may be drawn from the LNG flow path and introduced into the CNG flow path to control the temperature of CNG flowing therethrough.
Idaho National Laboratory 05/31/2005
Issued
Patent 7,222,647
Patent
7,222,647
Apparatus for dispensing compressed natural gas and liquified natural gas to natural gas powered vehicles
A fueling facility and method for dispensing liquid natural gas (LNG), compressed natural gas (CNG) or both on-demand. The fueling facility may include a source of LNG, such as cryogenic storage vessel. A low volume high pressure pump is coupled to the source of LNG to produce a stream of pressurized LNG. The stream of pressurized LNG may be selectively directed through an LNG flow path or to a CNG flow path which includes a vaporizer configured to produce CNG from the pressurized LNG. A portion of the CNG may be drawn from the CNG flow path and introduced into the CNG flow path to control the temperature of LNG flowing therethrough. Similarly, a portion of the LNG may be drawn from the LNG flow path and introduced into the CNG flow path to control the temperature of CNG flowing therethrough.
05/29/2007
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
B-233; 7222647, 6899146ProductionLicensed08/31/201208/31/2012

Contact INL About This Technology

To: Ryan Bills<Ryan.Bills@inl.gov>