Computer systems and methods for estimating changes in fugitive emissions

A computer system comprising:

• at least one processor;
• a data store configured to store archived data corresponding to plant operation of an industrial facility;
• and
• a non-transitory computer-readable memory storing computer-readable instructions that, when executed by the at least one processor, cause the at least one processor to:
• post-process the archived data, which corresponds to a combination of plant operation, algorithm, and graphical user interface, that allows evaluation of emission of the industrial facility, wherein the plant operation comprises a gas stream associated with gas plume detections in a first time interval;
• receive, from the data store, the archived data associated with the first time interval;
• determine, from the archived data, an overall response factor of a sensor, as equal to:
• 1
• X
• 1
• /
• F
• 1
• +
• X
• 2
• /
• F
• 2
• +
• X
• 3
• /
• F
• 3
• +
• …
• +
• X
• n
• /
• F
• n
• where X1-Xn are mole ratios of any gases in the gas stream, F1-Fn are individual response factors of species of the any gases in the gas stream;
• determine an emission indicator value (Di), based on detection events in the archived data, as follows:
• D
• i
• =
• ∑
• i
• =
• 1
• n
• S
• i
• ⁢
• F
• i
• where Si is an accumulative emission detection value for the first time interval from sensor i and Fi is the overall response factor for the gas streams at the sensor i, wherein the determining excludes detection events corresponding to a maintenance activity;
• determine, using the emission indicator value and corresponding overall response factor in the archived data for a second time interval, a first total emission indicator value for the industrial facility in the first time interval;
• determine a difference in value between the first total emission indicator value for the industrial facility in the first time interval and a second total emission indicator value for the facility in a second time interval;
• and
• send an indication of the difference to cause a visual comparison on a fugitive emission evaluation dashboard on the graphical user interface showing emission levels in the industrial facility at different time intervals;
• and
• a user computing device configured to display, on the graphical user interface of a display device coupled to the user computing device, the indication of the difference between the first total emission indicator value for the industrial facility in the first time interval and the second total emission indicator value for the facility in the second time interval, wherein the graphical user interface is used to allow evaluation of improvement across operations lifecycle by combining fugitive emissions evaluation data with plant information (PI) data across operation, safety, and emission control of the industrial facility.