Impact of Soot on Internal Combustion Engine Lubrication—Oil Condition Monitoring, Tribological Properties, and Surface Chemistry DOI Creative Commons
Adam Agocs, Marcella Frauscher, Andjelka Ristić

и другие.

Lubricants, Год журнала: 2024, Номер 12(11), С. 401 - 401

Опубликована: Ноя. 20, 2024

In the study at hand, a systemic investigation regarding tribochemical effects of crankcase soot is presented. Sooted oils were generated via an engine dynamometer test. Both conventional as well advanced oil condition monitoring methods indicated mild degradation additives. The wear volume was greatly increased with sooted in model tribometer tests, despite high residual zinc dialkyl dithiophosphate (ZDDP) antiwear (AW) levels. Once removed ultracentrifugation, returned to levels comparable fresh oil. Surface investigations revealed that ZDDP tribofilms could not form oils, only thin sulfide layer present on metal surfaces. Meanwhile, typical observable centrifuged oils. results tribocorrosive mechanism most likely responsible for elevated where iron base films formed, which then rapidly by particles abrasive manner.

Язык: Английский

Graphene/Trione Covalent-Organic-Frameworks Nanocomposite: Complementarity in Structure and Properties Improving Tribological Behaviors of PEG Base Oil DOI
Bing Zhao, Hongyang Wang, Rui Dong

и другие.

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(23), С. 27344 - 27354

Опубликована: Дек. 3, 2024

Native defects of a single nanomaterial in properties and structure inevitably cripple its lubrication performance, when served as lubricant additives. In this work, manipulating the content graphene to prepare graphene/trione covalent-organic-frameworks (Ton-COFs; GTCC) nanocomposites has first come true complementarity enhance performance. Specifically, we apply layers template whereon Ton-COFs could grow into even integral sheets at well-screened content, balance between rigidity flexibility is also achieved, which enables GTCC nanoadditive self-adapt cover over rubbing surface shapable possible, forming protective film. Besides, strong affinity metal polar groups electron-rich heterocycle further consolidates binding Eventually, with assistance high mechanical strength incommensurate effect heterostructure, nanocomposite (75 mg) additive exhibits optimal tribological reducing friction by 33% decreasing wear volume 96%, compared that poly(ethylene glycol) 400 base oil. This finding provides strategy promote application COFs nanoadditives practical lubrication.

Язык: Английский

Процитировано

0
Enhancing Heat Efficiency of New ZnFe2O4 and TiO2 -Infused MWCNT Nanocomposites in Transformer Oil DOI
Seyed Borhan Mousavi

Опубликована: Янв. 1, 2024

Язык: Английский

Процитировано

0
Performance Enhancement of Plate Heat Exchangers Using MWCNTs-SiO2 Hybrid Nanofluids: A CFD Analysis on Heat Transfer and Pressure Drop Characteristics DOI Creative Commons
Saeed Zeinali Heris,

Nima Zolfagharian,

Seyed Borhan Mousavi

и другие.

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Авг. 19, 2024

Abstract Heat exchangers play a vital role in numerous sectors like power generation and automotive manufacturing. Enhancing the energy efficiency of these stands as significant hurdle. Utilizing nanofluids emerges an optimal solution to augment heat transfer rates, leveraging their superior thermal conductivity while addressing economic constraints linked with traditional exchanger technologies. The motivation for this study is consider comprehensive synergistic features MWCNTs, SiO2, hybrid MWCNTs–SiO2 EG-based plate exchangers. This was achieved by simulating using CFD (Fluent Gambit softwares) considering comparison two forms at different mass concentrations. Reynolds-Averaged Navier-Stokes (RANS) method employed model turbulent flows, nanoparticles were compared both single-phase two-phase states, properties derived from experimental studies. Moreover, Nusselt number, convective coefficient, pressure drop variations computed Reynolds numbers. findings indicated increase number incorporation nanofluid, achieving maximum enhancement 11.19% EG 240 concentration 0.86 wt.%. Noticeably, remained negligible lower numbers, exhibiting marginal up 0.3% higher At wt.% 480, introduction hybrid, SiO2 nano-additives resulted respective increases coefficient 21.02%, 10.76%, 2.16% corresponding alterations 0.11%, 0.04%, 0.02%.

Язык: Английский

Процитировано

0
Enhanced Electrochemical Performance of Aluminum-Air Batteries Using Graphite and Graphene Oxide Electrocatalysts Doped with Nitrogen, Sulfur, and Phosphorus DOI

Mohammad Saadat,

Saeid Kheradmand

Arabian Journal for Science and Engineering, Год журнала: 2024, Номер unknown

Опубликована: Сен. 27, 2024

Язык: Английский

Процитировано

0
Impact of Soot on Internal Combustion Engine Lubrication—Oil Condition Monitoring, Tribological Properties, and Surface Chemistry DOI Creative Commons
Adam Agocs, Marcella Frauscher, Andjelka Ristić

и другие.

Lubricants, Год журнала: 2024, Номер 12(11), С. 401 - 401

Опубликована: Ноя. 20, 2024

In the study at hand, a systemic investigation regarding tribochemical effects of crankcase soot is presented. Sooted oils were generated via an engine dynamometer test. Both conventional as well advanced oil condition monitoring methods indicated mild degradation additives. The wear volume was greatly increased with sooted in model tribometer tests, despite high residual zinc dialkyl dithiophosphate (ZDDP) antiwear (AW) levels. Once removed ultracentrifugation, returned to levels comparable fresh oil. Surface investigations revealed that ZDDP tribofilms could not form oils, only thin sulfide layer present on metal surfaces. Meanwhile, typical observable centrifuged oils. results tribocorrosive mechanism most likely responsible for elevated where iron base films formed, which then rapidly by particles abrasive manner.

Язык: Английский

Процитировано

0