Determination of the hydrogen diffusion coefficient in transformer oil

Bychkov, A. L.; Korobeynikov, S. M.; Ryzhkina, A. Yu.

doi:10.1134/s1063784211030042

Cited by 16 publications

(10 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrogen (H 2 ), due to its high fuel efficiency, abundance, uncontaminated character, and sustainability, is one of the possible solutions to the impending energy crisis [1]. It is also a reliable gas for misdiagnosis in power transformers [2,3]. H 2 has also been used in other sectors, such as aerospace engineering, mineral refineries, oil exploration, chemical processing, cryogenic refrigeration, and many more [4].…”

Section: Introductionmentioning

confidence: 99%

Room Temperature Hydrogen Sensing Based on Tapered Optical Fiber Coated with Polyaniline (PANI)

Alkhabet

Girei

Ismail

et al. 2021

The 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry

View full text Add to dashboard Cite

This work demonstrates a hydrogen (H2) sensor at room temperature made of tapered optical fibers coated with a polyaniline (PANI) nanofiber. A transducing platform was constructed using a multimode optical fiber (MMF) with a 125 µm cladding and a 62.5 µm core diameter. In order to enhance the light evanescent field surrounding the fiber, the fibers were tapered from 125 µm in diameter to 20 µm in diameter with 10 mm waist and coated PANI using the drop casting technique. Various characterization techniques, such as field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX), differential X-ray (XRD), and atomic force microscopy, have been used to establish the PANI’s properties. When H2 is subtracted, the optical properties of the PANI layer change, resulting in a change in light absorption. The fabricated sensor was tested by exposing it to H2 at different concentration from 0.125% to 1%. In this case, the sensitivity, response, and recovery times were 15.928/vol%, 110 s, and 160 s, respectively. The improved hydrogen sensor holds great promise for environmental and industrial applications due to its ability to operate at room temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Room Temperature Hydrogen Sensing Based on Tapered Optical Fiber Coated with Polyaniline (PANI)

Alkhabet

Girei

Ismail

et al. 2021

The 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry

View full text Add to dashboard Cite

show abstract

“…As a new energy of high efficiency, non-pollution, sustainability, and abundant availability, hydrogen plays an important role in solving the energy crisis at present [1]. Meanwhile, hydrogen is also the characteristic gas for fault diagnosis of power transformers [2]. Recently, hydrogen has been widely used in aerospace engineering, petroleum explorations, metallurgical refineries, cryogenic cooling, chemical processing, automobiles, and many other fields [3,4].…”

Section: Introductionmentioning

confidence: 99%

Recent advancements in optical fiber hydrogen sensors

Zhang

Peng

Qian

et al. 2017

Sensors and Actuators B: Chemical

176

View full text Add to dashboard Cite

A review for optical fiber hydrogen sensors based on palladium (Pd) and tungsten oxide (WO 3) thin films is presented, with specific focus on the measurement methods, probe structures, and sensing properties of different sensors. Firstly, the theoretical models behind the optical fiber hydrogen sensors, as well as their practical limitations, are addressed. Secondly, four mainstream measurement methods, including intensity, fiber Bragg grating (FBG), interferometer, surface plasmon resonance (SPR), which have been proposed to sense the physicochemical properties variations of sensitive thin films when exposed to hydrogen, are reviewed. Then, the advantages and disadvantages of all the above measurement methods are also discussed and compared. Finally, the existing problems and future prospects of optical fiber hydrogen sensors are pointed out.

show abstract

“…As per the IEEE standard, the moisture content typically suitable in transformer insulating oil at 50 °C is 173 ppm, which is proportionate to a 15.6 percent relative saturation (%RS) in the range of 69 kV, a 6.9 %RS in the range of 69–230 kV, and 5.8 %RS in the region over 230 kV . Among several methods to measure the moisture content, chromatography and coulometry are well-known techniques. , However, these techniques are “online sampling but offline estimation” techniques and required to collect a significant oil sample consistently. The testing is time consuming and there is a certain possibility of change in moisture over sample transportation and storage.…”

mentioning

confidence: 99%

A Highly Sensitive and Stable rGO:MoS₂-Based Chemiresistive Humidity Sensor Directly Insertable to Transformer Insulating Oil Analyzed by Customized Electronic Sensor Interface

et al. 2021

View full text Add to dashboard Cite

Reduced graphene oxide and molybdenum disulfide (rGO:MoS 2 ) are the most representative two-dimensional materials, which are promising for a humidity sensor owing to its high surface area, a large number of active sites, and excellent mechanical flexibility. Herein, we introduced a highly sensitive and stable rGO:MoS 2 -based humidity sensor integrated with a lowpower in-plane microheater and a temperature sensor, directly insertable to transformer insulating oil, and analyzed by a newly developed customized sensor interface electronics to monitor the sensor's output variations in terms of relative humidity (RH) concentration. rGO:MoS 2 sensing materials were synthesized by simple ultrasonication without using any additives or additional heating and selectively deposited on titanium/platinum (Ti/Pt) interdigitated electrodes on a SiO 2 substrate using the drop-casting method. The significant sensing capability of p−n heterojunction formation between rGO and MoS 2 was observed both in the air and transformer insulating oil environment. In air testing, the sensor exhibited an immense sensitivity of 0.973 kΩ/%RH and excellent linearity of ∼0.98 with a change of humidity from 30 to 73 %RH, and a constant resistance deviation with an inaccuracy rate of 0.13% over 400 h of continual measurements. In oil, the sensor showed a high sensitivity of 1.596 kΩ/%RH and stable repeatability for an RH concentration range between 34 and 63 %RH. The obtained results via the sensor interface were very similar to those measured with a digital multimeter, denoting that our developed total sensor system is a very promising candidate for realtime monitoring of the operational status of power transformers.

show abstract

Determination of the hydrogen diffusion coefficient in transformer oil

Cited by 16 publications

References 1 publication

Room Temperature Hydrogen Sensing Based on Tapered Optical Fiber Coated with Polyaniline (PANI)

Room Temperature Hydrogen Sensing Based on Tapered Optical Fiber Coated with Polyaniline (PANI)

Recent advancements in optical fiber hydrogen sensors

A Highly Sensitive and Stable rGO:MoS₂-Based Chemiresistive Humidity Sensor Directly Insertable to Transformer Insulating Oil Analyzed by Customized Electronic Sensor Interface

Contact Info

Product

Resources

About

Determination of the hydrogen diffusion coefficient in transformer oil

Cited by 16 publications

References 1 publication

Room Temperature Hydrogen Sensing Based on Tapered Optical Fiber Coated with Polyaniline (PANI)

Room Temperature Hydrogen Sensing Based on Tapered Optical Fiber Coated with Polyaniline (PANI)

Recent advancements in optical fiber hydrogen sensors

A Highly Sensitive and Stable rGO:MoS2-Based Chemiresistive Humidity Sensor Directly Insertable to Transformer Insulating Oil Analyzed by Customized Electronic Sensor Interface

Contact Info

Product

Resources

About

A Highly Sensitive and Stable rGO:MoS₂-Based Chemiresistive Humidity Sensor Directly Insertable to Transformer Insulating Oil Analyzed by Customized Electronic Sensor Interface