AX670 3BSE000566R1 ABB Module controller \ bus communication industrial control spare parts

AX670 3BSE000566R1 ABB Module controller \ bus communication industrial control spare parts

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A natural gas sample is extracted from the pipeline, processed for particulate

removal and phase integrity by the sample conditioning module (optional as

required), transported to the NGC and injected onto the chromatographic columns

where component separation occurs.

The NGC analyzes each sample, utilizing established chromatographic

techniques. The resulting information consists of mole percent values for each

component. These values are used to perform energy calculations. Calculated

values include: gas compressibility, real relative density, Btu/CV value, liquid

GPM, wobbe index, methane number and several other optional calculated

values. Gas compressibility selections include NX-19, AGA-8 detail, single virial

summation factor, ISO summation factor and none (a factor of one is used).

The processed sample is then vented with the carrier gas and results are stored in

memory and communicated to other devices, as needed. All of these values as

well as composition are available on various Modbus communication protocols.

1.2.1 Hydrnocarbons

To further define the natural gas components, Table 1–1 gives additional details

for each hydrocarbon. Among the key information is the boiling point of the

component. The boiling point of each component correlates to the order each

component will exit the column.