公开(公告)号：US11435337B2

公开(公告)日：2022-09-06

申请号：US16405205

申请日：2019-05-07

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Shafiqur Rehman ,  Luai M. Alhems ,  Ramsey Jadim

IPC: G01N1/14 ,  G01N33/28 ,  H01F27/12 ,  G01N30/02 ,  G01N1/24

Abstract: A system, device, and a method for determining a compound content in transformer oil are provided. The method includes positioning a syringe filled with transformer oil in the device to transfer the oil to a vial using the device. The device includes a stand, a threaded rod, a handle, a disc, and a syringe holder. The threaded rod is movable in a vertical direction by rotation of the handle and is configured to apply pressure via the disc on a plunger of the syringe positioned in the syringe holder to maintain an airtight connection between the vial and the device. The compound content is determined using a gas chromatograph by analyzing an aliquot extracted from a headspace gas of the vial.

公开(公告)号：US09983188B2

公开(公告)日：2018-05-29

申请号：US14857332

申请日：2015-09-17

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Shafiqur Rehman ,  Luai M. Alhems ,  Ramsey Jadim

IPC: G01N33/28 ,  G01N33/00 ,  G01K13/00

CPC classification number: G01N33/287 ,  G01K13/00 ,  G01N33/0044

Abstract: An apparatus for measuring the rate of Cu2S formation in power transformers comprising a sealable transformer vessel and a sealable lid with at least four sealable ports, and an internal apparatus configuration involving a copper metal sheet, a power transformer, a temperature sensor, and a weighing device providing real-time feedback data, whereby these components are submerged in an effective amount of a reactive sulfur-containing transformer oil and sealed. An inert gas atmosphere is provided within the transformer vessel by a gas bubbler. The transformer oil is heated with a heating bath to a reactive temperature for Cu2S production. A method of measuring the rate of Cu2S formation whereby the apparatus is purged with an inert gas, heated to a reactive temperature, examined for Cu2S formation, the Cu2S produced is quantified and the rate of formation of Cu2S is calculated.

公开(公告)号：US10386352B2

公开(公告)日：2019-08-20

申请号：US15971760

申请日：2018-05-04

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Shafiqur Rehman ,  Luai M. Alhems ,  Ramsey Jadim

IPC: G01N33/28 ,  G01N33/00 ,  G01K13/00

Abstract: An apparatus for measuring the rate of Cu2S formation in power transformers comprising a sealable transformer vessel and a sealable lid with at least four sealable ports, and an internal apparatus configuration involving a copper metal sheet, a power transformer, a temperature sensor, and a weighing device providing real-time feedback data, whereby these components are submerged in an effective amount of a reactive sulfur-containing transformer oil and sealed. An inert gas atmosphere is provided within the transformer vessel by a gas bubbler. The transformer oil is heated with a heating bath to a reactive temperature for Cu2S production. A method of measuring the rate of Cu2S formation whereby the apparatus is purged with an inert gas, heated to a reactive temperature, examined for Cu2S formation, the Cu2S produced is quantified and the rate of formation of Cu2S is calculated.