公开(公告)号：US09778237B2

公开(公告)日：2017-10-03

申请号：US14631036

申请日：2015-02-25

Applicant: Cummins, Inc.

Inventor： Shu Li ,  Leon A. LaPointe ,  Aniket Gupta ,  Matthew L. Schneider

IPC: G01N33/26 ,  G01N33/00 ,  G01N33/22 ,  G01N25/18

CPC classification number: G01N33/0036 ,  G01N25/18 ,  G01N33/225

Abstract: Disclosed are methods, systems, and computer-readable mediums for determining combustion properties of wellhead gas. A methane concentration of a gas mixture is measured. A non-methane hydrocarbon concentration of the gas mixture is measured. An inert concentration of the gas mixture is calculated. A first surrogate for the non-methane hydrocarbon concentration is selected, where the first surrogate is selected as propane if the methane concentration is greater than a first threshold, and where the first surrogate is selected as pentane if the methane concentration is less than or equal to the first threshold. A methane number of the gas mixture is determined, where the methane number is based on the methane concentration, the first surrogate, and the inert concentration.

公开(公告)号：US20180321138A1

公开(公告)日：2018-11-08

申请号：US15973155

申请日：2018-05-07

Applicant: Cummins Inc.

Inventor： Shu Li ,  Alok A. Joshi ,  Matthew L. Schneider ,  John P. Coates

IPC: G01N21/25 ,  G01N21/27 ,  G01N21/15 ,  G01M15/10

CPC classification number: G01N21/255 ,  G01M15/108 ,  G01N21/15 ,  G01N21/27 ,  G01N2201/0636 ,  G01N2201/0873

Abstract: An exhaust gas detection assembly, comprising a sensing system comprising a wide-band light source and a detector, a probe configured for mounting in a port of a component of an engine exhaust system, and a fiber optic bundle connected between the sensing system and the probe to carry source light from the light source to the probe and reflected light from the probe to the detector, wherein the detector comprises a filter that passes reflected light received from the probe in a wavelength range corresponding to a wavelength range affected by the presence of a type of gas molecules in the probe.

公开(公告)号：US20150241399A1

公开(公告)日：2015-08-27

申请号：US14631036

申请日：2015-02-25

Applicant: Cummins, Inc.

Inventor： Shu Li ,  Leon A. LaPointe ,  Aniket Gupta ,  Matthew L. Schneider

IPC: G01N33/00 ,  G01N25/18

CPC classification number: G01N33/0036 ,  G01N25/18 ,  G01N33/225

Abstract: Disclosed are methods, systems, and computer-readable mediums for determining combustion properties of wellhead gas. A methane concentration of a gas mixture is measured. A non-methane hydrocarbon concentration of the gas mixture is measured. An inert concentration of the gas mixture is calculated. A first surrogate for the non-methane hydrocarbon concentration is selected, where the first surrogate is selected as propane if the methane concentration is greater than a first threshold, and where the first surrogate is selected as pentane if the methane concentration is less than or equal to the first threshold. A methane number of the gas mixture is determined, where the methane number is based on the methane concentration, the first surrogate, and the inert concentration.

Abstract translation: 公开了用于确定井口气体的燃烧性质的方法，系统和计算机可读介质。 测量气体混合物的甲烷浓度。 测量气体混合物的非甲烷烃浓度。 计算气体混合物的惰性浓度。 选择非甲烷烃浓度的第一替代物，其中如果甲烷浓度大于第一阈值，则将第一替代物选择为丙烷，并且如果甲烷浓度小于或等于第一替代物选择为戊烷， 到第一个阈值。 确定气体混合物的甲烷数，其中甲烷数基于甲烷浓度，第一替代物和惰性浓度。