Correction to "Vegetable Oils, an Alternative to Mineral Oil for Power Transformers–Experimental Study of Paper Aging in Vegetable Oil Versus Mineral Oil"

2011 ◽  
Vol 27 (1) ◽  
pp. 46-46 ◽  
Author(s):  
Maria Augusta G. Martins
Keyword(s):  
Experimental Study ◽  
Vegetable Oil ◽  
Vegetable Oils ◽  
Mineral Oil ◽  
Power Transformers

Assessment of Wetting Kinematics and Cooling Performance of Select Vegetable Oils and Mineral-Vegetable Oil Blend Quench Media

2015 ◽  
Vol 830-831 ◽  
pp. 160-163 ◽  
Author(s):  
K.M. Pranesh Rao ◽  
K. Narayan Prabhu
Keyword(s):  
Vegetable Oil ◽  
Vegetable Oils ◽  
Rice Bran ◽  
Canola Oil ◽  
Rice Bran Oil ◽  
Extraction Process ◽  
Mineral Oil ◽  
Heat Extraction ◽  
Cooling Performance ◽  
Oil Blend

Quench hardening is a process where an alloy is heated to solutionizing temperature and held for a definite period, and then rapidly cooled in a quenching medium. Selection of quenchant that can yield desired properties is essential as it governs heat extraction process during quenching. In the present work, the cooling performance of vegetable oil and mineral-vegetable oil blend quench media was assessed. The vegetable oils used in this work were olive oil, canola oil and rice bran oil. The mineral-vegetable oil blends were prepared by blending 10 and 20 vol. % of rice bran and canola oil in mineral oil. Inconel probe of 12.5mm diameter and 60mm height, instrumented with thermocouples were used to characterize quenchants. The probe was heated to 850°C and quenched in the oil medium. The cooling curves at different locations in the probe were used to study wetting kinematics. Inverse modelling technique was used to estimate spatially dependent metal-quenchant interfacial heat flux. It was found that the vegetable oils exhibited very short vapour blanket stage compared to mineral oil and blends. Faster wetting kinematics obtained with blends resulted in uniform heat transfer compared to that of mineral oil. The temperature distribution in the probe quenched in vegetable oils and blends was more uniform compared to that in mineral oil. It is expected that the parts quenched in vegetable oils and blends would lead to better hardness distribution compared to mineral oils.

scholarly journals State-of-the-Art and Future Perspectives of Environmentally Friendly Machining Using Biodegradable Cutting Fluids

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4816
Author(s):  
M. Naveed ◽  
A. Arslan ◽  
H. M. A. Javed ◽  
T. Manzoor ◽  
M. M. Quazi ◽  
...  
Keyword(s):  
Vegetable Oil ◽  
Vegetable Oils ◽  
Edible Oils ◽  
Cutting Parameters ◽  
Mineral Oil ◽  
Vital Role ◽  
Cutting Fluids ◽  
Petroleum Resources ◽  
Comparable Performance ◽  
Cost Efficient

The use of cutting fluids has played a vital role in machining operations in lubrication and cooling. Most cutting fluids are mineral oil-based products that are hazardous to the environment and the worker, cause severe diseases and pollute the environment. In addition, petroleum resources are becoming increasingly unsustainable. Due to environmental and health issues, legislations have been established to ensure that the consumption of mineral oil is reduced. Consequently, researchers are making efforts to replace these mineral oil-based products. Vegetable oils are grasping attention due to their better lubricating properties, ease of availability, biodegradability, low prices, and non-toxicity. In this study, a detailed review and critical analysis are conducted of the research works involving vegetable oils as cutting fluids keeping in view the shortcomings and possible solutions to overcome these drawbacks. The purpose of the review is to emphasise the benefits of vegetable oil-based cutting fluids exhibiting comparable performance to that of mineral oil-based products. In addition, an appropriate selection of non-edible vegetable oil-based cutting fluids along with optimum cutting parameters to avoid a scanty supply of edible oils is also discussed. According to this research, vegetable oils are capable of substituting synthetic cutting fluids, and this option might aid in the successful and cost-efficient implementation of green machining.

scholarly journals Friction and wear response of vegetable oils and their blends with mineral engine oil in a reciprocating sliding contact at severe contact conditions

2017 ◽  
Vol 232 (3) ◽  
pp. 244-258 ◽  
Author(s):  
Adli Bahari ◽  
Roger Lewis ◽  
Tom Slatter
Keyword(s):  
Wear Resistance ◽  
Soybean Oil ◽  
Vegetable Oil ◽  
Vegetable Oils ◽  
Palm Oil ◽  
Mineral Oil ◽  
Tribological Performance ◽  
Engine Oil ◽  
Wear Performance ◽  
Friction Performance

Although many studies investigating the tribological performance of pure vegetable oils have been conducted, a better understanding of vegetable oil tribological performance at extreme conditions is still needed. Similarly, little work has been carried out to study the influence of the vegetable oils on the performance of a lubricant formed from a blend of vegetable oil and conventional mineral engine oil. This work presents the tribological performance of vegetable oils, and their blends with mineral oil, in a high temperature and contact pressure reciprocating contact. Palm- and soybean-based vegetable oils were mixed with a commercial mineral engine oil at a 1:1 ratio by volume. The conventional mineral oil was also tested to provide a benchmark. The pure palm oil exhibited lower friction than soybean oil, but for the wear performance, this was reversed. The friction performance of the palm oil was competitive to that of the mineral engine oil. The mineral engine oil was far superior in wear resistance over both vegetable oils. When blended with mineral engine oil, both vegetable oils demonstrated a reduction in coefficient of friction when compared to their pure oil states. An improvement in the wear performance was observed for both a blend of palm oil and mineral engine oil (25% improvement) and that of soybean and mineral engine oil (27% improvement). This work shows that for palm oil and soybean oil, the performance of a blended oil is influenced by its vegetable oil component and that tribological characteristics of vegetable oils are dominant. That said, the significant limitation of these vegetable oils is their ability to provide a satisfactory level of wear resistance. It is suggested that any future work in this area should have a greater emphasis on the enhancement of wear resistance.

scholarly journals Optimization of Various Natural Ester Oils Impregnated Nomex Paper Performance in Power Transformer Applications under Different Ageing Conditions

2019 ◽  
Vol 8 (3) ◽  
pp. 6245-6251 ◽  
Keyword(s):  
Vegetable Oil ◽  
Vegetable Oils ◽  
Power Transformer ◽  
Well Being ◽  
Mineral Oil ◽  
Mustard Oil ◽  
Mineral Oils ◽  
Time Frames ◽  
The Impact ◽  
To Receive

Vegetable oils are being considered as the potential replacements to mineral oils because of their better natural execution and for their high fire point. In spite of the fact that these fluids have been utilized as a part of appropriation transformers, it is as yet a huge advance to receive vegetable oils in control transformer because of high cost and abnormal state of well being and unwavering quality required in benefit for these units. Vegetable oils such as honge oil (HO), neem oil (NO), mustard oil (MO), punna oil (PO) and castor oil (CO) offer the reasonable option for mineral oil. It is expected that the greater part of the un-matured oil could fulfil the base necessity of dielectric protection fluids in the transformer. This paper concentrated on the impact of maturing on the electrical and physicochemical properties of HO, NO, MO, PO and CO. Fixed maturing tests have been set at 90°C for 30 days, 60 days and 90 days. Prior to the maturing procedure, the examples were dried in a vacuum broiler under the pressure of 0.8kPa at 85°C for 48 hours keeping in mind the end goal to evacuate the dampness content in the oils. At that point, the oils were impregnated with the Nomex paper and keep on ageing for choosing the span time. The electrical properties (relative permittivity, dielectric misfortunes, resistivity and breakdown quality), mechanical properties (thickness and elasticity) and substance properties (dampness and corrosiveness) of the oils were estimated all through the maturing time frames. It can be reasoned that the research center quickened warm maturing test uncovers that every single vegetable oil in this examination are safe towards oxidation in light of the steady thickness and low corrosiveness estimations of vegetable oils all through the maturing term even with the nearness of oxygen. The AC breakdown voltages of vegetable oils can in any case conform to the prescribed furthest reaches of new Vegetable oil set by ASTM 6781 even after subjected to maturing. From the results, it may be concluded that the proposed vegetable oils can be used as the alternatives for mineral oil.

scholarly journals Synthesis of Eco-Friendly Machining Lubricants and Its Tribological Characteristics

2019 ◽  
Vol 8 (3) ◽  
pp. 1902-1906
Keyword(s):  
Wear Rate ◽  
Vegetable Oil ◽  
Coefficient Of Friction ◽  
Vegetable Oils ◽  
Castor Oil ◽  
Mineral Oil ◽  
Cutting Fluids ◽  
Oil Emulsion ◽  
Mahua Oil ◽  
Oil Emulsions

Use of vegetable oil as a base for the preparation of machining fluids for the replacement for mineral oil is a growing research area because of the harmful effects to the environmental degradation of soil and water affecting plants and aquatic species, health hazards to the workers, bio-degradability and carcinogenic effects. Further most of the research work is carried out by formulating cutting fluids from vegetable oils using petroleum based emulsifiers, which defeats the purpose of using vegetable oils. In the present study lubricants from vegetable oil based emulsions were formulated with food grade emulsifier polysorbate 80. Cutting fluids were formulated by using vegetable oils as a base in an aqueous solution with emulsifying agent in the ratio of 1: 20. The tribological properties of these vegetable oil emulsions were investigated using a rotary type tribometer. The tribometer has a stationary loaded pin made from EN8-steel (workpiece material) which slides over the rotating disc made of EN31-steel. The experiments were performed with two different sliding speeds and four different loads. Coefficient of friction, friction force, wear rate and surface roughness were recorded and analysed. The wear rate of the pins while lubricating with castor oil and mahua oil emulsions was low as compared to palm oil emulsion. At low speed the friction was low with castor oil emulsion, while at higher speed the coefficient of friction was low with mahua oil emulsion. A conclusion has been arrived from the experiments that the castor oil emulsion gave better lubrication properties as compare to palm, mahua and mineral oil emulsions

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