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Relevant bibliographies by topics / Bio-Oil, Thermal Conductivity, Mineral-Oil, Thermal Properties / Journal articles

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Journal articles on the topic 'Bio-Oil, Thermal Conductivity, Mineral-Oil, Thermal Properties'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Kaneta, M., and P. Yang. "Effects of Thermal Conductivity of Contacting Surfaces on Point EHL Contacts." Journal of Tribology 125, no. 4 (2003): 731–38. http://dx.doi.org/10.1115/1.1540121.

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With actual and virtual materials, the effects of the thermal conductivity of contacting surfaces on EHL are investigated through experimental analyses using the optical interferometry technique and the Newtonian thermal EHL analyses in consideration of the variation of oil properties in all directions within the film. A mineral bright stock is used as a lubricant. It is found that the distributions of pressure and film thickness, including the minimum film thickness, are influenced very much by the entrainment velocity and the slide-roll ratio. One of the causes is the temperature-viscosity w

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2

Saman, Norhafezaidi Mat, Izzah Hazirah Zakaria, Mohd Hafizi Ahmad, and Zulkurnain Abdul-Malek. "Effects of Plasma Treated Alumina Nanoparticles on Breakdown Strength, Partial Discharge Resistance, and Thermophysical Properties of Mineral Oil-Based Nanofluids." Materials 14, no. 13 (2021): 3610. http://dx.doi.org/10.3390/ma14133610.

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Mineral oil has been chosen as an insulating liquid in power transformers due to its superior characteristics, such as being an effective insulation medium and a great cooling agent. Meanwhile, the performance of mineral oil as an insulation liquid can be further enhanced by dispersing nanoparticles into the mineral oil, and this composition is called nanofluids. However, the incorporation of nanoparticles into the mineral oil conventionally causes the nanoparticles to agglomerate and settle as sediment in the base fluid, thereby limiting the improvement of the insulation properties. In additi

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3

Paciorek-Sadowska, Joanna, Marcin Borowicz, and Marek Isbrandt. "Effect of Evening Primrose (Oenothera biennis) Oil Cake on the Properties of Polyurethane/Polyisocyanurate Bio-Composites." International Journal of Molecular Sciences 22, no. 16 (2021): 8950. http://dx.doi.org/10.3390/ijms22168950.

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Rigid polyurethane/polyisocyanurate (RPU/PIR) foam formulations were modified by evening primrose (Oenothera biennis) oil cake as a bio-filler in the amount of 5 to 50 wt.%. The obtained foams were tested in terms of processing parameters, cellular structure (SEM analysis), physico-mechanical properties (apparent density, compressive strength, brittleness, accelerated aging tests), thermal insulation properties (thermal conductivity coefficient, closed cells content, absorbability and water absorption), flammability, smoke emission, and thermal properties. The obtained results showed that the

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4

Umar, Sadik, Fauziah Sulaiman, Nurhayati Abdullah, and Saiful Najmee Mohamad. "Preparation, Stability and Thermal Characteristic of Al2O3/Bio-Oil Based Nanofluids for Heat Transfer Applications." Journal of Nanoscience and Nanotechnology 20, no. 12 (2020): 7569–76. http://dx.doi.org/10.1166/jnn.2020.18616.

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Conventional thermal fluids with suspended nanoparticles, known as nanofluids, have been developed for heat transfer applications. Heat transfer loss could be reduced significantly if the thermophysical properties of the heat transfer fluid are improved, which to some extent, could reduce the present global environmental challenges associated with energy utilization, such as climate change and global warming. In this work, the role of the concentration of sodium dodecyl-benzene sulfonate (SDBS) in the stability of Al2O3/bio-oil nanofluid is investigated the zeta potential value, and its implic

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5

Katpatal, Dhananjay C., Atul B. Andhare, and Pramod M. Padole. "Viscosity behaviour and thermal conductivity prediction of CuO-blend oil based nano-blended lubricant." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, no. 8 (2018): 1154–68. http://dx.doi.org/10.1177/1350650118819634.

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Lubricants play a major role in mechanical machines and studies on various nanolubricants are reported in the literature. This work deals with nanolubricants using blend of oils as base for nanolubricants. Nano-blended lubricants were prepared with a blend of ISO VG46 oil (mineral oil) and Jatropha oil (non-edible vegetable oil) and using them in proportions of 90:10 and 80:20 by dispersing 0.5–3 wt.% of surface-modified CuO nanoparticles by a two-step method. Various properties of these oils such as dispersion stability, viscosity and thermal conductivity were determined. Experimental values

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Qing, Soo Hui, W. Rashmi, M. Khalid, T. C. S. M. Gupta, M. Nabipoor, and Mohammad Taghi Hajibeigy. "Thermal conductivity and electrical properties of hybrid SiO2-graphene naphthenic mineral oil nanofluid as potential transformer oil." Materials Research Express 4, no. 1 (2017): 015504. http://dx.doi.org/10.1088/2053-1591/aa550e.

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7

Glavatskih, Sergei B., Michel Fillon, and Roland Larsson. "The Significance of Oil Thermal Properties on the Performance of a Tilting-Pad Thrust Bearing." Journal of Tribology 124, no. 2 (2001): 377–85. http://dx.doi.org/10.1115/1.1405129.

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This paper is a report into an experimental and theoretical investigation of the effect of oil thermal properties on the performance of a tilting-pad thrust bearing. Three oils, namely poly-α-olefin, ester and mineral base, were chosen for this study. These oils all have same viscosity grade (ISO VG46) but differ in their rates of viscosity variation with temperature and in their heat capacity and thermal conductivity values. Mineral base oil of a higher viscosity grade (ISO VG68) was also analyzed for comparison. Experimental data were obtained from an equalizing tilting-pad thrust bearing wi

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8

Borowicz, Marcin, Joanna Paciorek-Sadowska, Jacek Lubczak, and Bogusław Czupryński. "Biodegradable, Flame-Retardant, and Bio-Based Rigid Polyurethane/Polyisocyanurate Foams for Thermal Insulation Application." Polymers 11, no. 11 (2019): 1816. http://dx.doi.org/10.3390/polym11111816.

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This article raised the issue of studies on the use of new bio-polyol based on white mustard seed oil and 2,2’-thiodiethanol (3-thiapentane-1,5-diol) for the synthesis of rigid polyurethane/polyisocyanurate (RPU/PIR) foams. For this purpose, new formulations of polyurethane materials were prepared. Formulations contained bio-polyol content from 0 to 0.4 chemical equivalents of hydroxyl groups. An industrial flame retardant, tri(2-chloro-1-methylethyl) phosphate (Antiblaze TCMP), was added to half of the formulations. Basic foaming process parameters and functional properties, such as apparent

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9

Paciorek-Sadowska, Joanna, Marcin Borowicz, Bogusław Czupryński, Ewa Tomaszewska, and Joanna Liszkowska. "New bio-polyol based on white mustard seed oil for rigid PUR-PIR foams." Polish Journal of Chemical Technology 20, no. 2 (2018): 24–31. http://dx.doi.org/10.2478/pjct-2018-0019.

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AbstractA new bio-polyol based on white mustard oil (Synapis alba) and 2,2′-mercaptodiethanol (2,2′-MDE) was obtained. The synthesis was carried out by two-step method. In the first stage, the double bond of the unsaturated fatty acid residues was oxidized, and in the second step the epoxy rings were opened with 2,2’-MDE. The properties of the obtained bio-polyol for application as raw material in polyurethane-polyisocyanurate foams (PUR-PIR) - hydroxyl number, acid number, density, viscosity, pH, water content, FTIR,1H NMR and13C NMR were investigated. Based on the obtained results, foaming f

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10

Aranberri, Ibon, Sarah Montes, Ewa Wesołowska, Alaitz Rekondo, Krystyna Wrześniewska-Tosik, and Hans-Jürgen Grande. "Improved Thermal Insulating Properties of Renewable Polyol Based Polyurethane Foams Reinforced with Chicken Feathers." Polymers 11, no. 12 (2019): 2002. http://dx.doi.org/10.3390/polym11122002.

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In the present work, sustainable rigid polyurethane foams (RPUF) reinforced with chicken feathers (CF) were prepared and characterized. The bio-based polyol used to formulate the foams was obtained from castor oil. This investigation reports the influence of the chicken feathers fibers as reinforcement of RPUF, on water absorption, thermal, mechanical and morphological properties (field-emission scanning electron microscope—FESEM) and thermal conductivity on water-blown biofoams. It was found that the biofoams improved thermal insulating properties when CF was added. The addition of CF to foam

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11

Abolins, Arnis, Ralfs Pomilovskis, Edgars Vanags, et al. "Impact of Different Epoxidation Approaches of Tall Oil Fatty Acids on Rigid Polyurethane Foam Thermal Insulation." Materials 14, no. 4 (2021): 894. http://dx.doi.org/10.3390/ma14040894.

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A second-generation bio-based feedstock—tall oil fatty acids—was epoxidised via two pathways. Oxirane rings were introduced into the fatty acid carbon backbone using a heterogeneous epoxidation catalyst-ion exchange resin Amberlite IR-120 H or enzyme catalyst Candida antarctica lipase B under the trade name Novozym® 435. High functionality bio-polyols were synthesised from the obtained epoxidated tall oil fatty acids by oxirane ring-opening and subsequent esterification reactions with different polyfunctional alcohols: trimethylolpropane and triethanolamine. The synthesised epoxidised tall oil

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Raj, Raymon Antony, Ravi Samikannu, Abid Yahya, and Modisa Mosalaosi. "Performance evaluation of natural esters and dielectric correlation assessment using artificial neural network (ANN)." Journal of Advanced Dielectrics 10, no. 05 (2020): 2050025. http://dx.doi.org/10.1142/s2010135x20500253.

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The performance of correlation between the dielectric parameters of Baobab Oil (BAO) and Mongongo Oil (MGO) is evaluated using Artificial Neural Network (ANN). The BAO and MGO naturally own high Unsaturated Fatty Acids (UFAs) and are highly biodegradable. The temperature studies and dielectric studies are carried out and found that the Natural Esters (NEs) show a reliable performance over mineral oil-based Transformer Oil (TO). Further the endurance test, Partial Discharge Inception Voltage (PDIV) repetition rate and drop after 30 days, dielectric measurements are done as per the standards of

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13

Kurańska, Maria, Roman Barczewski, Mateusz Barczewski, Aleksander Prociak, and Krzysztof Polaczek. "Thermal Insulation and Sound Absorption Properties of Open-Cell Polyurethane Foams Modified with Bio-Polyol Based on Used Cooking Oil." Materials 13, no. 24 (2020): 5673. http://dx.doi.org/10.3390/ma13245673.

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The main goal of this work was to evaluate the thermal insulation and sound absorption properties of open-cell rigid polyurethane foams synthesized with different contents of cooking oil-based polyol. The content of the applied bio-polyol as well as flame retardant (triethyl phosphate) in the foam formulation had a significant influence on the cellular structures of the materials. The open-cell polyurethane foams were characterized by apparent densities in the range 16–30 kg/m3. The sound absorption coefficients of the polyurethanes with various contents of bio-polyol were determined using the

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Kurańska, Maria, Milena Leszczyńska, Elżbieta Malewska, Aleksander Prociak, and Joanna Ryszkowska. "Implementation of Circular Economy Principles in the Synthesis of Polyurethane Foams." Polymers 12, no. 9 (2020): 2068. http://dx.doi.org/10.3390/polym12092068.

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The main strategy of the European Commission in the field of the building industry assumes a reduction of greenhouse gas emissions by up to 20% by 2020 and by up to 80% by 2050. In order to meet these conditions, it is necessary to develop not only efficient thermal insulation materials, but also more environmentally friendly ones. This paper describes an experiment in which two types of bio-polyols were obtained using transesterification of used cooking oil with triethanolamine (UCO_TEA) and diethylene glycol (UCO_DEG). The bio-polyols were next used to prepare low-density rigid polyurethane

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Kurańska, Maria, Elżbieta Malewska, Krzysztof Polaczek, Aleksander Prociak, and Joanna Kubacka. "A Pathway toward a New Era of Open-Cell Polyurethane Foams—Influence of Bio-Polyols Derived from Used Cooking Oil on Foams Properties." Materials 13, no. 22 (2020): 5161. http://dx.doi.org/10.3390/ma13225161.

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In order to create greener polyurethane (PUR) foams, modified used cooking oils (UCO) were applied as starting resources for the synthesis of bio-polyols. The bio-polyols were produced using transesterification of UCO with diethylene glycol (UCO_DEG) and triethanolamine (UCO_TEA). Next, open-cell PUR foams were synthesized by replacing 20, 40, 60, 80 and 100% of the petrochemical polyol with the bio-polyol UCO_DEG or UCO_TEA. It was observed that an increasing bio-polyol content (up to 60%) led to an increase of the closed cell content. However, a further increase in the bio-polyol content up

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Kurańska, Maria, Hynek Beneš, Kamila Sałasińska, Aleksander Prociak, Elżbieta Malewska, and Krzysztof Polaczek. "Development and Characterization of “Green Open-Cell Polyurethane Foams” with Reduced Flammability." Materials 13, no. 23 (2020): 5459. http://dx.doi.org/10.3390/ma13235459.

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This work presents the cell structure and selected properties of polyurethane (PUR) foams, based on two types of hydroxylated used cooking oil and additionally modified with three different flame retardants. Bio-polyols from municipal waste oil with different chemical structures were obtained by transesterification with triethanolamine (UCO_TEA) and diethylene glycol (UCO_DEG). Next, these bio-polyols were used to prepare open-cell polyurethane foams of very low apparent densities for thermal insulation applications. In order to obtain foams with reduced flammability, the PUR systems were modi

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17

Agrawal, Anuja, Raminder Kaur, and R. S. Walia. "Development of vegetable oil-based conducting rigid PU foam." e-Polymers 19, no. 1 (2019): 411–20. http://dx.doi.org/10.1515/epoly-2019-0042.

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AbstractIn this study, carbon fibre powder has been used as reinforcement to enhance the electrical conductivity of bio-based rigid polyurethane foam. Effect of carbon fibre incorporation on the mechanical, thermal and flame retardant properties has also been investigated. Results concluded that the foams with 8% carbon fibre concentration showed up to 288% increase in compressive strength. Furthermore, up to 28% decrease in the peak of heat release rate (PHRR) was observed on the incorporation of carbon fibre powder. Additionally, the rate of smoke production was also found decreased for carb

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18

Deenesh, N. K., Khalid Hasnan, R. Kandasamy, and Nafarizal Nayan. "Influence on Transport Properties by Utilizing Unsteady Squeezed Magnetohydrodynamics Flow of Copper and Single Wall Carbon Nanotube Mineral Oil-Based Insulating Nanofluid in Traction Transformer of an Electric Train: A Numerical Study." Journal of Computational and Theoretical Nanoscience 17, no. 2 (2020): 1242–50. http://dx.doi.org/10.1166/jctn.2020.8796.

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Mineral oil and synthetic ester are mainly used as the dielectric and insulating fluid for traction transformer in an electric train. Due to excessive heat caused by the high-power supply and frequent travel cycle, the traction transformer faces faster thermal aging. A lot of researches have been performed to improve the heat transfer and thermal conductivity of the current insulating fluid. Recent studies show that adding nanoparticles can enhance the transport properties of the existing fluid in the marketplace. The “try and error” experiment method in order to get the optimum nanofluid will

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19

Kairytė, Agnė, Saulius Vaitkus, and Giedrius Balčiūnas. "THE IMPACT OF CHAIN EXTENDER ON THE PROPERTIES OF POLYURETHANE FOAM BASED ON RAPESEED OIL POLYOL OBTAINED VIA CHEMO–ENZYMATIC ROUTE." Engineering Structures and Technologies 8, no. 3 (2016): 101–7. http://dx.doi.org/10.3846/2029882x.2016.1209726.

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Presently, researches regarding green chemistry are conducted due to its significance for the mitigation of environmental problems, particularly those related to carbon dioxide emissions in relation to global warming and the usage of fossil feedstocks not only for energy generation but also for materials production. The study examines the impact of bio-products such as corn starch, rapeseed glycerin as well as petroleum based propylene glycol as bifunctional and trifunctional chain extenders on physical-mechanical properties of polyurethane foam from rapeseed oil polyol derived via chemo-enzym

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20

Kusworo, Tutuk Djoko, Widayat Widayat, Athaya Fairuz Mahadita, Dila Firizqina, and Dani Puji Utomo. "Bio-oil and Fuel Gas Production from Agricultural Waste via Pyrolysis: A Comparative Study of Oil Palm Empty Fruit Bunches (OPEFB) and Rice Husk." Periodica Polytechnica Chemical Engineering 64, no. 2 (2019): 179–91. http://dx.doi.org/10.3311/ppch.14553.

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Biomass-based energy from agricultural wastes is a promising alternative energy source since its abundant supply and renewable. Biomass is converted into gas and liquid fuel through biochemical or thermochemical treatments. In this work, oil palm empty fruit bunches (OPEFB) and rice husk are pyrolyzed to produce gas and liquid fuel. The reactor temperature and feed mass are varied to obtain the best operating condition in a semi-batch pyrolysis reactor. The experimental results showed that the best operating temperature in pyrolysis process to produce bio-oils from OPEFB and rice husk was at 5

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21

Khan, M. Ijaz, Hassan Waqas, Umar Farooq, Sami Ullah Khan, Yu-Ming Chu, and S. Kadry. "Assessment of bioconvection in magnetized Sutterby nanofluid configured by a rotating disk: A numerical approach." Modern Physics Letters B 35, no. 12 (2021): 2150202. http://dx.doi.org/10.1142/s021798492150202x.

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Owing to the growing interest of bioconvection flow of nanomaterials, many investigations on this topic have been performed, especially in this decade. The bioconvection flow of nanofluid includes some novel significance in era of biotechnology and bio-engineering like bio-fuels, microbial enhanced oil recovery, enzymes, pharmaceutical applications, petroleum engineering, etc. The current analysis aims to explore the various thermal properties of Sutterby nanofluid over rotating and stretchable disks with external consequences of variable thermal conductivity, heat absorption/generation conseq

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Dombek, Grzegorz, Zbigniew Nadolny, and Agnieszka Marcinkowska. "Effects of Nanoparticles Materials on Heat Transfer in Electro-Insulating Liquids." Applied Sciences 8, no. 12 (2018): 2538. http://dx.doi.org/10.3390/app8122538.

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This paper discusses the effect of doping of electro-insulating liquids with nanoparticle materials on the thermal properties of the obtained nanoliquids and heat transport in the transformer. Mineral oil, synthetic ester, and natural ester were used as base liquids. The effectiveness of doping base liquids with nanoparticles was supported by ultraviolet-visible (UV/VIS) measurements. In turn, Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) confirmed the absence of intermolecular interactions (i.e., hydrogen bonding). The influence of modification of electro-insulating liquid

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23

Tuan. Naiwi, Tuan, Min Aung, Azizan Ahmad, et al. "Enhancement of Plasticizing Effect on Bio-Based Polyurethane Acrylate Solid Polymer Electrolyte and Its Properties." Polymers 10, no. 10 (2018): 1142. http://dx.doi.org/10.3390/polym10101142.

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Polyurethane acrylate (PUA) from vegetable oil has been synthesized and prepared for solid polymer electrolyte. Polyol has been end-capped with Toluene 2,4-Diisocyanate (TDI) followed by hydroxylethylmethylacrylate (HEMA) in a urethanation process to produce PUA. The mixtures were cured to make thin polymeric films under UV radiation to produce excellent cured films which exhibit good thermal stability and obtain high ionic conductivity value. 3 to 15 wt. % of ethylene carbonate (EC) mixed with 25 wt. % LiClO4 was added to PUA to obtain PUA electrolyte systems. PUA modified with plasticizer EC

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Gunnarshaug, Amalie, Maria Monika Metallinou, and Torgrim Log. "Study of Industrial Grade Thermal Insulation at Elevated Temperatures." Materials 13, no. 20 (2020): 4613. http://dx.doi.org/10.3390/ma13204613.

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Thermal insulation is used for preventing heat losses or heat gains in various applications. In industries that process combustible products, inorganic-materials-based thermal insulation may, if proven sufficiently heat resistant, also provide heat protection in fire incidents. The present study investigated the performance and breakdown temperature of industrial thermal insulation exposed to temperatures up to 1200 °C, i.e., temperatures associated with severe hydrocarbon fires. The thermal insulation properties were investigated using thermogravimetric analysis (TGA), differential scanning c

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Kairytė, Agnė, Saulius Vaitkus, and Arūnas Kremensas. "Synthesis of Biocomposite with Different Ratios of Rapeseed Oil Binder/Wood Bark: Mechanical and Hygrothermal Properties." Key Engineering Materials 799 (April 2019): 142–47. http://dx.doi.org/10.4028/www.scientific.net/kem.799.142.

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Growing economy is a basis of public well-being, and its rapid growth is implemented on the expense of environmental quality; therefore, the harmonization of different aims and interests is one of the most important aspects of sustainable development concept. One of the priorities of sustainable development in Lithuania – the reduction of building and building materials industries’ impact on environment by increasing their eco and energy efficiency; consequently, the use of waste from renewable resources for the synthesis of chemical materials and production of building materials may reduce th

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Anuar, Muhammad Firdaus, Payam Shafigh, Azman Ma’amor, Sumra Yousuf, and Farid Wajdi Akashah. "Experimental Analysis of Changes in Cement Mortar Containing Oil Palm Boiler Clinker Waste at Elevated Temperatures in Different Cooling Conditions." Crystals 11, no. 8 (2021): 988. http://dx.doi.org/10.3390/cryst11080988.

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Changes in cement-based materials containing waste after exposure to elevated temperatures are an important aspect that should be studied in developing sustainable construction materials. Modified cement-based materials obtained using the industrial waste present robust engineering properties can lead to sustainable development. This work evaluated the capacity of oil palm boiler clinker (OPBC) waste that had been produced during the palm oil extraction process as partial and full substitutions for natural sand to produce cement mortar. The mortar materials were cured under three different cur

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Iyer, Karthik, Henrik Svensen, and Daniel W. Schmid. "SILLi 1.0: a 1-D numerical tool quantifying the thermal effects of sill intrusions." Geoscientific Model Development 11, no. 1 (2018): 43–60. http://dx.doi.org/10.5194/gmd-11-43-2018.

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Abstract. Igneous intrusions in sedimentary basins may have a profound effect on the thermal structure and physical properties of the hosting sedimentary rocks. These include mechanical effects such as deformation and uplift of sedimentary layers, generation of overpressure, mineral reactions and porosity evolution, and fracturing and vent formation following devolatilization reactions and the generation of CO2 and CH4. The gas generation and subsequent migration and venting may have contributed to several of the past climatic changes such as the end-Permian event and the Paleocene–Eocene Ther

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Oloyede Christopher, Tunji, Bukola Akande Fatai, Olaniyi Oriola Kazeem, and Oluwatoyin Oniya Oluwole. "Thermal properties of soursop seeds and kernels." Research in Agricultural Engineering 63, No. 2 (2017): 79–85. http://dx.doi.org/10.17221/22/2016-rae.

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The thermal properties of soursop seeds and kernels were determined as a function of moisture content, ranged from 8.0 to 32.5% (d.b.). Three primary thermal properties: specific heat capacity, thermal conductivity and thermal diffusivity were determined using Dual-Needle SH-1 sensors in KD2-PRO thermal analyser. The obtained results shown that specific heat capacity of seeds and kernels increased linearly from 768 to 2,131 J/kg/K and from 1,137 to 1,438 J/kg/K, respectively. Seed thermal conductivity increased linearly from 0.075 to 0.550 W/m/K while it increased polynomially from 0.153 to 0.

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Sağlam, Cihangir, and Türkan Aktaş. "Changing of viscosity and thermal properties of olive oil with different harvesting methods and waiting period." Tehnički glasnik 12, no. 1 (2018): 50–54. http://dx.doi.org/10.31803/tg-20180110130636.

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The aim of this paper is to determine how different harvesting methods of olives and the waiting period before the extraction of the extra virgin olive oil affect the viscosity and some thermal properties, namely thermal conductivity and thermal resistivity. Olive trees in the Aegean region of the western part of Turkey were harvested by using six different harvesting methods: by hand, harvesting by a beating pole on a synthetic fabric, harvesting by a beating pole on a platform, harvesting by machine on a synthetic fabric, harvesting by machine on a platform and direct collecting of dropped o

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Yao, Wei, Zhengyong Huang, Jian Li, Liya Wu, and Chenmeng Xiang. "Enhanced Electrical Insulation and Heat Transfer Performance of Vegetable Oil Based Nanofluids." Journal of Nanomaterials 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/4504208.

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Nanoparticles enhance the electrical insulation and thermal properties of vegetable oil, and such improvements are desirable for its application as an alternative to traditional insulating oil for power transformers. However, the traditional method of insulating nanofluids typically achieves high electrical insulation but low thermal conductivity. This work reports an environmentally friendly vegetable oil using exfoliated hexagonal boron nitride (h-BN) showing high thermal conductivity and high electrical insulation. Stable nanofluids were prepared by liquid exfoliation of h-BN in isopropyl a

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Wang, Yi Chun, Xiao Xia Sun, Xiao Rong Tang, and Fa Cheng Wang. "Investigation of Thermal Conductivity of Alumina/Silicone Oil Electrorheological Fluids." Advanced Materials Research 129-131 (August 2010): 421–25. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.421.

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Electrorheological (ER) fluids are new materials with good properties such as dielectric constant, dielectric loss or conductivity, which display remarkable rheological behavior, being able to convert rapidly and repeatedly from a liquid to solid when an electric field is applied or removed. In this study, suspensions of alumina (A) were prepared in silicone oil (SO). The effects of electric field strength and temperature of the suspensions on thermal conductivity were determined. Thermal conductivity measurement in different conditions was carried out via experimental instrument with high-vol

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Irani, Mazda, and Marya Cokar. "Discussion on the Effects of Temperature on Thermal Properties in the Steam-Assisted-Gravity-Drainage (SAGD) Process. Part 1: Thermal Conductivity." SPE Journal 21, no. 02 (2013): 334–52. http://dx.doi.org/10.2118/178426-pa.

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Summary Steam-assisted gravity drainage (SAGD) is the preferred thermal-recovery method used to produce bitumen from Athabasca deposits in Alberta, Canada. In SAGD, steam injected into a horizontal injection well is forced into the reservoir, losing its latent heat when it comes into contact with cold bitumen at the edge of a depletion chamber. Heat energy is transferred from steam to reservoir, resulting in reduced bitumen viscosity that enables the bitumen to flow toward the horizontal production well under gravity forces. Conduction is the main heat-transfer mechanism at the edge of the ste

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Serri, Eravan, M. Zailan Suleiman, and M. Azree Othuman Mydin. "The Effects of Oil Palm Shell Aggregate Shape on the Thermal Properties and Density of Concrete." Advanced Materials Research 935 (May 2014): 172–75. http://dx.doi.org/10.4028/www.scientific.net/amr.935.172.

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Oil Palm Shell (OPS) are one of low thermal conductivity course aggregate for lightweight concrete. This paper report on all thermal properties parameter, thermal conductivity, specific heat and thermal diffusivity. Tree mixes of OPS of air dry density 1733 to 1811 kg/m3 and oven dry density 1502 to 1632 kg/m3 were prepaid and tested for thermal properties and compared with normal concrete using crushed granite as control and conventional materials. Raw shape with air density 1733 kg/m3 showed the lowest thermal properties with thermal conductivity, specific heat and thermal diffusivity of 0.5

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Vasiliauskienė, Dovilė, Giedrius Balčiūnas, Renata Boris, Agnė Kairytė, Arūnas Kremensas, and Jaunius Urbonavičius. "The Effect of Different Plant Oil Impregnation and Hardening Temperatures on Physical-Mechanical Properties of Modified Biocomposite Boards Made of Hemp Shives and Corn Starch." Materials 13, no. 22 (2020): 5275. http://dx.doi.org/10.3390/ma13225275.

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In this study, tung tree and linseed drying oils, as well as semi-drying hempseed oil, were analyzed as the protective coatings for biocomposite boards (BcB) made of hemp shives, corn starch binder, and the performance-enhancing additives. The hydrophobization coatings were formed at 40, 90, and 120 °C temperatures, respectively. The physical-mechanical properties such as the compressive strength, thermal conductivity, dimensional stability, water absorption, and swelling were tested. In addition, scanning electron microscopy (SEM) was employed for the analysis of the board microstructure to v

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Sukkar, Khalid A., Abullhassan A. Karamalluh, and Thulfiqar N. Jaber. "Rheological and Thermal Properties of Lubricating Oil Enhanced by the Effect of CuO and TiO2 Nano-Additives." Al-Khwarizmi Engineering Journal 15, no. 2 (2019): 24–33. http://dx.doi.org/10.22153/kej.2019.12.002.

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The specifications of lubricating oil are fundamentally the final product of materials that have been added for producing the desired properties. In this research, spherical nanoparticles copper oxide (CuO) and titanium oxides (TiO2) are added to SAE 15W40 engine oil to study the thermal conductivity, stability, viscosity of nano-lubricants, which are prepared at different concentrations of 0.1%, 0.2%, 0.5%, and 1% by weight, and also their pour point, and flash point as five quality parameters. The obtained results show that CuO nanoparticles in all cases, give the best functionality and effe

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Durkin, S. M., and I. N. Menshikova. "EFFECT OF THERMAL PROPERTIES OF ROCKS TO STEAM STIMULATION." Oil and Gas Studies, no. 1 (March 1, 2017): 50–53. http://dx.doi.org/10.31660/0445-0108-2017-1-50-53.

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The results of analysis of effect of thermal properties of rocks to steam stimulation by numerical simulation are considered. Several hydrodynamic models of oil pool of Yarega field with different thermal properties: thermal conductivity and heat capacity of rocks - are created. It concluded that the uncertainty of initial information about thermal properties of rocks can significantly affect on development indicators.

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Safira, Lulu, Nandy Putra, Titin Trisnadewi, Eny Kusrini, and Teuku Meurah Indra Mahlia. "Thermal properties of sonicated graphene in coconut oil as a phase change material for energy storage in building applications1." International Journal of Low-Carbon Technologies 15, no. 4 (2020): 629–36. http://dx.doi.org/10.1093/ijlct/ctaa018.

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Abstract This study aims to investigate the thermal properties of a phase change material (PCM) based on coconut oil for building energy storage applications. Coconut oil is classified as an organic PCM composed of fatty acids made from renewable feedstock. However, low thermal conductivity is one of the major drawbacks of organic PCMs that must be improved. Graphene could be an effective material to enhance the thermal performance of organic PCMs. In this study, coconut oil with a latent heat capacity of 114.6 J/g and a melting point of 17.38°C was used. PCMs were prepared by sonicating graph

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Flores Cuautle, José de Jesús Agustín, Oscar Osvaldo Sandoval González, Carlos Omar González Morán, José Pastor Rodríguez Jarquin, Citlalli Jessica Trujillo Romero, and Gemima Lara Hernandez. "Effect of Sunflower, Almond, and Rapeseed Oils as Additives on Thermal Properties of a Machinery Oil." Applied Sciences 11, no. 16 (2021): 7441. http://dx.doi.org/10.3390/app11167441.

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Vegetable oils are considered to be eco-friendly and to offer good lubricant properties; however, their low thermo-oxidative stability makes their use as a lubricant base challenging. In this research, sunflower, almond, and rapeseed vegetable oils were added in volumes of 5, 10, 15, and 20% to a machinery oil, and the thermal properties of the resulting fluids were studied. Sunflower, almond, and rapeseed oils were chosen considering their fatty acid composition and the tocopherol content. During this investigation, thermal diffusivity was measured by using the thermal wave resonance cavity t

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Wang, Baogang, Xiaobo Wang, Wenjing Lou, and Jingcheng Hao. "Thermal conductivity and rheological properties of graphite/oil nanofluids." Colloids and Surfaces A: Physicochemical and Engineering Aspects 414 (November 2012): 125–31. http://dx.doi.org/10.1016/j.colsurfa.2012.08.008.

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Gunnarshaug, Amalie, Maria-Monika Metallinou, and Torgrim Log. "Industrial Thermal Insulation Properties above Sintering Temperatures." Materials 14, no. 16 (2021): 4721. http://dx.doi.org/10.3390/ma14164721.

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Processing highly flammable products, the oil and gas (O&G) industry can experience major explosions and fires, which may expose pressurized equipment to high thermal loads. In 2020, oil fires occurred at two Norwegian O&G processing plants. To reduce the escalation risk, passive fire protection may serve as a consequence-reducing barrier. For heat or cold conservation, equipment and piping often require thermal insulation, which may offer some fire protection. In the present study, a representative thermal insulation (certified up to 700 °C) was examined with respect to dimensional ch

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El Idrissi, Hanane Sghiouri, Abderrahim Samaouali, Younes El Rhaffari, Salah El Alami, and Yves Geraud. "Characterization of the Petrophysical Properties of the Timahdit Oil Shale Layers in Morocco." Geosciences 10, no. 9 (2020): 337. http://dx.doi.org/10.3390/geosciences10090337.

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In this work, we study the variability of the lithological composition and organic matter content of samples were taken from the different layers M, X and Y of the Timahdit oil shale in Morocco, in order to experimentally analyze the impact of this variability on petrophysical measurements. The objective of this study is to predict the properties of the layers, including their thermal conductivity, thermal diffusivity, porosity and P and S wave velocities. The results of the study of the impact of the organic matter content of the samples on the petrophysical measurements show that, regardless

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Kahwaji, Samer, and Mary Anne White. "Edible Oils as Practical Phase Change Materials for Thermal Energy Storage." Applied Sciences 9, no. 8 (2019): 1627. http://dx.doi.org/10.3390/app9081627.

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Edible oils could provide more accessible alternatives to other phase change materials (PCMs) for consumers who wish to build a thermal energy storage (TES) system with sustainable materials. Edible oils have good shelf life, can be acquired easily from local stores and can be less expensive than other PCMs. In this work, we explore whether margarine, vegetable shortening, and coconut oil are feasible PCMs, by investigations of their thermal properties and thermal stability. We found that margarine and vegetable shortening are not useful for TES due to their low latent heat of fusion, ΔfusH, a

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Journal, Baghdad Science. "Comparison of Properties of Various Heat Storage Fluids used with Evacuated Tube of Solar Water Heater." Baghdad Science Journal 11, no. 1 (2014): 111–15. http://dx.doi.org/10.21123/bsj.11.1.111-115.

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The aim of this work was to capture solar radiation and convert it into solar thermal energy by using a storage material and the heat transfer fluid like oil and water and comparison between them, we used the evacuated tube as a receiver for solar radiation, The results showed that the oil better than water as storage material and the heat transfer fluid and the effective thermal conductivity material and good for power level, rates and durations of charge and discharge cycles.

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Moslemi Petrudi, Amin, and Masoud Rahmani. "Validation and Optimization of Thermophysical Properties for Thermal Conductivity and Viscosity of Nanofluid Engine Oil using Neural Network." Journal of Modeling and Simulation of Materials 3, no. 1 (2020): 53–60. http://dx.doi.org/10.21467/jmsm.3.1.53-60.

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In this study, the thermophysical properties of thermal conductivity and viscosity of a motor oil nanofluid were investigated using experimental data and artificial neural network. NSGA II optimization algorithm was used to maximize thermal conductivity and minimum viscosity with changes in temperature and volume fraction of nanofluids. Also, to obtain the viscosity and thermal conductivity values in terms of nanofluid temperature and volume fraction with 174 experimental data, neural network modeling was performed. Input data include temperature and volume fraction, and output is viscosity an

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Abdul Rahim, Mohd Salleh, Izwan Ismail, and Syarifah Nur Aqida. "Effects of Nano Copper Additive on Thermal Conductivity of Magnetorheological Fluid at Different Environment Temperature." Materials Science Forum 890 (March 2017): 108–11. http://dx.doi.org/10.4028/www.scientific.net/msf.890.108.

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Low thermal conductivity of magnetorheological (MR) fluid limits its potential to be applied in high temperature environment. Recently, enhancing thermal conductivity of similar fluids through addition of nanocopper has attracted to address the problem. This paper presents the effects of nanocopper addition on thermal conductivity properties of MR fluid at different environment temperatures. The nanocopper added MR fluid samples were synthesized with carbonyl iron powder in hydraulic oil. The samples were then stabilized with addition of fumed silica and were homogenized using ultrasonic bath.

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FAN, JING, and LIQIU WANG. "MICROSTRUCTURAL EFFECTS ON MACROSCALE THERMAL PROPERTIES IN NANOFLUIDS." Nano 05, no. 02 (2010): 117–25. http://dx.doi.org/10.1142/s1793292010002001.

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The recent first-principle model shows that heat conduction in nanofluids can be diffusion-dominant or thermal-wave-dominant depending on their microscale physics (structures, properties and activities). As the first attempt of quantifying when and to what extent thermal waves become important, we numerically examine effects of particle–fluid conductivity ratio, particle shape, volume fraction and nondimensional particle–fluid interfacial area in the unit-cell on macroscale thermal properties for nanofluids consisting of in-line arrays of perfectly dispersed two-dimensional circular, square an

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Pantokratoras, Asterios. "The Classical Plane Couette-Poiseuille Flow With Variable Fluid Properties." Journal of Fluids Engineering 128, no. 5 (2006): 1115–21. http://dx.doi.org/10.1115/1.2238878.

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A theoretical study of the effect of variable viscosity and variable thermal conductivity on the classical plane Couette-Poiseuille flow is presented in this brief communication. The investigation concerns engine oil, air, and water taking into account the variation of these quantities with temperature. The results are obtained with the numerical simulation of the governing equations and cover large temperature differences. Velocity and temperature profiles are presented as well as the volume flow rate and the heat flux between the plates. It is found that temperature profiles are close to the

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Ranjbarzadeh, Ramin, and Raoudha Chaabane. "Experimental Study of Thermal Properties and Dynamic Viscosity of Graphene Oxide/Oil Nano-Lubricant." Energies 14, no. 10 (2021): 2886. http://dx.doi.org/10.3390/en14102886.

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This experimental study was carried out based on the nanotechnology approach to enhance the efficacy of engine oil. Atomic and surface structures of graphene oxide (GO) nanoparticles were investigated by using a field emission scanning electron microscope and X-ray diffraction. The nano lubricant was produced by using a two-step method. The stability of nano lubricant was analyzed through dynamic light scattering. Various properties such as thermal conductivity, dynamic viscosity, flash point, cloud point and freezing point were investigated and the results were compared with the base oil (Oil

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Malisic, Vanja, Natasa Tomic, Marija Vuksanovic, et al. "An experimental study of mechanical properties and heat transfer of acrylic composites with structural and surface modified Al2O3 particles." Science of Sintering 52, no. 4 (2020): 457–67. http://dx.doi.org/10.2298/sos2004457m.

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Thermal properties of acrylate-based composite combined with alumina-based particles were investigated. The composites were made of poly (methyl methacrylate) (PMMA) modified with dimethyl itaconate (DMI) as a matrix. Neat alumina particles (Al2O3) and alumina doped with iron oxide (Al2O3-Fe) modified with 3-aminopropyl-trimethoxylane (AM) and flax oil fatty acid methyl esters (biodiesel - BD) were used as reinforcement. Thermal conductivity measurements showed that composite with alumina particles with the highest alpha phase content had the highest thermal conductivity values. Mechanical pro

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Xing, Zhipeng, Hongjun Ke, Xiaodong Wang, et al. "Investigation of the Thermal Conductivity of Resin-Based Lightweight Composites Filled with Hollow Glass Microspheres." Polymers 12, no. 3 (2020): 518. http://dx.doi.org/10.3390/polym12030518.

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The design and development of thermal insulation materials is very important for the treatment of offshore oil pipelines. Understanding thermal energy transport in thermal insulation materials and predicting their thermal conductivities have important theoretical and practical value for the design of thermal insulation materials. In this work, lightweight and thermally insulated (LWTI) composites with the desired mechanical strength for offshore oil pipelines applications were prepared using epoxy resin (EP) as the matrix and hollow glass microspheres (HGMs) as the filler. The morphology, dens

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