Gas analyzer

A gas analysis system comprising:

• a flow cell within which a gas is flowed from an inlet port to an outlet port, the inlet port in fluid communication with a gas intake path that is less than 2 meters in length;
• a light source configured to transmit light through the flow cell;
• a detector subsystem configured to output an absorptance signal representing an absorptance of light by components of the gas in the flow cell;
• a first temperature sensor proximate the flow cell and configured to measure temperature of the gas at a rate of about 1.0 Hz or faster;
• a pressure sensor proximate the flow cell and configured to measure pressure at a rate of about 1.0 Hz or faster;
• and
• an intelligence module coupled with the first temperature sensor, the pressure sensor, and the detector subsystem,
• the intelligence module adapted to determine a dry mole fraction of the components of the gas based on the absorptance signal and measurements of the pressure and the temperature of the gas,
• the intelligence module further adapted to determine a gas flux based on the dry mole fraction absent correction for cumulative effects due to water vapor, temperature, and pressure.

A method of measuring dry mole fraction of components ( )a gas in a flow cell of a gas analyzer, the method comprising:

• flowing a gas through the flow cell;
• measuring an absorptance of light of a component of the gas in the flow cell;
• measuring a temperature, T1, of the gas proximate the flow cell;
• measuring a pressure, P, at a location proximate the flow cell, wherein the measurements of the temperature, T1, and the pressure, P, are taken at a rate of about 1.0 Hz or faster;
• and thereafter
• determining a dry mole fraction of the component of the gas based on the measured absorptance, P, and T1.

A gas analysis system comprising:

• a flow cell within which a gas is flowed from an inlet port to an outlet port;
• a light source configured to transmit light through the flow cell;
• a detector subsystem configured to output an absorptance signal representing an absorptance of light by the components of the gas in the flow cell;
• a first temperature sensor configured to measure a temperature of gas proximate the flow cell at a rate of about 1.0 Hz or faster;
• a pressure sensor proximate the flow cell and configured to measure pressure at a rate of about 1.0 Hz or faster;
• and
• an intelligence module coupled with the first temperature sensor, the pressure sensor, and with the detector subsystem, the intelligence module adapted to determine a dry mole fraction of the components of the gas based on the absorptance signal and measurements of pressure and of the temperature of the gas.

A method of measuring dry mole fraction of components of a gas in a flow cell of a gas analyzer, the method comprising:

• flowing a gas through the flow cell;
• measuring an absorptance of light of a component of the gas in the flow cell;
• measuring a temperature, T1, of the gas proximate the flow cell, at a rate of about 1.0 Hz or faster;
• measuring a pressure, P, at a location proximate to the flow cell;
• and thereafter
• determining a dry mole fraction of the component of the gas based on the measured absorptance, P, and T1.

A method for determining gas flux, comprising:

• flowing a gas through a flow cell including the flow cell receiving the gas from the atmosphere along a gas intake path that is less than 2 meters in length;
• measuring a temperature of the air proximate the flow cell at a rate of about 1.0 Hz or faster;
• measuring a water vapor level in the flow cell;
• measuring a pressure of the atmosphere proximate to the flow cell;
• determining a dry mole fraction value based at least on the temperature, the water vapor level, and the pressure;
• and
• determining a gas flux based on the dry mole fraction without correcting for cumulative effects due to water vapor, temperature, and pressure.