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US 4,062,223 AGranted
Nitrogen content monitor for liquified natural gas
AssigneeSimmonds Precision Products, Inc.
InventorsDavid A. Lamphere, Paul G. Weitz, Jr.
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AssigneeSimmonds Precision Products, Inc.
InventorsDavid A. Lamphere, Paul G. Weitz, Jr.
Estimating the term…
A monitoring system for determining the volumetric percentage of liquid nitrogen in a quantity of liquified natural gas (LNG) whose composition of liquified hydrocarbon gases is known, and which is stored at atmospheric pressure. The system includes a device, such as a temperature-dependent resistor connected to a power source, for producing an electric signal proportional to the temperature of the liquified gas. This temperature signal is subtracted from a reference signal which is equal to the temperature signal when the liquified natural gas does not contain any nitrogen, and which can be produced by a device such as a precision resistor connected to the power source. The differential signal output of the temperature and reference signals will be proportional to the volumetric percentage of nitrogen in the liquified natural gas, and a standard readout device, such as a voltmeter, can be calibrated to read the volumetric percentage of nitrogen from this differential signal.
A nitrogen content monitoring system for determining the nitrogen content of stored liquified natural gas (LNG) having a known composition of liquified hydrocarbon gases and stored at atmospheric pressure, which comprises, in combination:
Dependencies are inferred from the claim text.