scholarly journals Effects of different types of surfactants on AC breakdown voltage of refined, bleached and deodorized palm oil based CuO nanofluids

2018 ◽  
Author(s):  
N. A. Mohamad ◽  
N. Azis ◽  
J. Jasni ◽  
R. Yunus ◽  
M.Z.A. Ab Kadir ◽  
...  
Keyword(s):  
Breakdown Voltage ◽  
Palm Oil ◽  
Different Types

Dissolved Gas Analysis of Palm Oil Compared with Mineral Oil from Different Types of Breakdown Voltage

2020 ◽  
Author(s):  
Suthat Suksagoolpanya ◽  
Korraya Jongvilaikasem ◽  
Kitipod Jariyanurat ◽  
Thanpilin Banthoengjai ◽  
Siwakorn Jeenmuang ◽  
...  
Keyword(s):  
Breakdown Voltage ◽  
Palm Oil ◽  
Mineral Oil ◽  
Gas Analysis ◽  
Dissolved Gas ◽  
Dissolved Gas Analysis ◽  
Different Types

scholarly journals A Study on the Lightning Impulse Breakdown Voltages of Palm Oil and Coconut Oil by Different Methods

2015 ◽  
Vol 793 ◽  
pp. 9-13 ◽  
Author(s):  
Y.V. Thien ◽  
N. Azis ◽  
J. Jasni ◽  
Mohd Zainal Abidin Ab Kadir ◽  
Robiah Yunus ◽  
...  
Keyword(s):  
Electric Field ◽  
Breakdown Voltage ◽  
Palm Oil ◽  
Coconut Oil ◽  
Uniform Electric Field ◽  
Testing Methods ◽  
Different Types ◽  
Lightning Impulse ◽  
Potential Alternative ◽  
Voltage Performance

In recent years, there have been a number of interests on the Palm Oil (PO) and Coconut Oil (CO) as a potential alternative dielectric insulating fluid in transformers which stimulate different types of studies on these oils properties. Among the important studies is the lightning impulse properties. This paper presents the investigation on the lightning impulse breakdown voltage of PO and CO under non-uniform electric field. The PO used in this study is Refined, Bleached and Deodorized Palm Oil (RBDPO) Olein type. The influence of the testing methods, rising-voltage and up-and-down are investigated at 2 gap distances for both oils. It was found that the lightning breakdown voltage performance for some of the RBDPO and CO are comparable to MO.

Effect of Particles on the AC Breakdown Voltage of Palm Oil and Coconut Oil

2015 ◽  
Vol 793 ◽  
pp. 70-74 ◽  
Author(s):  
S.S. Sinan ◽  
J. Jasni ◽  
N. Azis ◽  
Mohd Zainal Abidin Ab Kadir ◽  
M.N. Mohtar
Keyword(s):  
Breakdown Voltage ◽  
Palm Oil ◽  
Breakdown Strength ◽  
Coconut Oil ◽  
Strength Properties ◽  
Copper Particles ◽  
Biodegradable Oils ◽  
Different Types ◽  
Current Scenario ◽  
Safety And Environment

Under current scenario of regulation on the safety and environment, biodegradable oils are gaining interest as dielectric insulating fluid in transformers. There are different types of biodegradable oils that are currently examined and among them are Palm Oil (PO) and Coconut Oil (CO). It is important to carry out extensive examination on these oils at laboratory level since the failure in-service could be costly. Among the important studies are the AC breakdown strength properties under the influence of particles. In this paper, a study is carried out to examine the influence of particles on the AC breakdown voltage of POand CO. The PO used in this study is Refined Bleached and Deodorized (RBDPO) Olein type. Two types of particles are used for the investigations which are cellulose and copper particles.Four different weights of particles are added on each of the samples and tested with the AC breakdown tester at a gap distance of 1 mm using VDE electrodes. It was found that copper particles have more significant effect on the AC breakdown strength of RBDPO and CO than cellulose particles.

Effect of Water on Electrical Properties of Refined, Bleached, and Deodorized Palm Oil (RBDPO) as Electrical Insulating Material

2013 ◽  
Vol 64 (4) ◽  
Author(s):  
Nazera Ismail ◽  
Yanuar Z. Arief ◽  
Zuraimy Adzis ◽  
Shakira A. Azli ◽  
Abdul Azim A. Jamil ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Breakdown Voltage ◽  
Palm Oil ◽  
Pour Point ◽  
Electrical Breakdown ◽  
Dissipation Factor ◽  
Mineral Oil ◽  
Flash Point ◽  
Effect Of Water ◽  
Insulating Liquid

This paper describes the properties of refined, bleached, deodorized palm oil (RBDPO) as having the potential to be used as insulating liquid. There are several important properties such as electrical breakdown, dielectric dissipation factor, specific gravity, flash point, viscosity and pour point of RBDPO that was measured and compared to commercial mineral oil which is largely in current use as insulating liquid in power transformers. Experimental results of the electrical properties revealed that the average breakdown voltage of the RBDPO sample, without the addition of water at room temperature, is 13.368 kV. The result also revealed that due to effect of water, the breakdown voltage is lower than that of commercial mineral oil (Hyrax). However, the flash point and the pour point of RBDPO is very high compared to mineral oil thus giving it advantageous possibility to be used safely as insulating liquid. The results showed that RBDPO is greatly influenced by water, causing the breakdown voltage to decrease and the dissipation factor to increase; this is attributable to the high amounts of dissolved water.

scholarly journals Investigation on the Breakdown Characteristics of Different Types of Lightning Rods

2018 ◽  
Vol 17 (2) ◽  
pp. 1-5
Author(s):  
Noor Azlinda Ahmad ◽  
Rosniza Zainal ◽  
Zuraimy Adzis
Keyword(s):  
Breakdown Voltage ◽  
High Voltage ◽  
Horizontal Distance ◽  
Different Types ◽  
Series Of Experiments ◽  
Voltage Breakdown

This paper investigates the voltage breakdown characteristics of three types of lightning rods - blunt, sharp and flat. The objectives of this study are to determine the voltage breakdown characteristics of various types of lightning rods and to obtain the striking distance of each rod. A series of experiments were conducted in the high voltage laboratory consisting of individual testing rod, competitive testing rod and also horizontal distance changing. All three types of rods have been tested in each experiment in order to obtain a comprehensive result. The blunt rod has been proven as the best strike receptor in comparison to sharp and flat rod. This is because breakdown voltage for blunt rod is much lower (199 kV) than that of flat and sharp rod. Therefore, replacement of widely used sharp rod with the blunt one should be considered in order to provide better protection for buildings from lightning activities. 

scholarly journals Lightning Breakdown Voltage Evaluation of Palm Oil and Coconut Oil as Transformer Oil under Quasi-Uniform Field Conditions

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2676 ◽  
Author(s):  
Nurul Katim ◽  
Mohd Ishak ◽  
Nur Mohamad Amin ◽  
Mardhiah Abdul Hamid ◽  
Khairol Amali Ahmad ◽  
...  
Keyword(s):  
Normal Distribution ◽  
Breakdown Voltage ◽  
Palm Oil ◽  
Coconut Oil ◽  
Cumulative Probability ◽  
Uniform Field ◽  
Multiple Level ◽  
Testing Methods ◽  
Distribution Fitting ◽  
Level Method

This paper presents lightning (1.2/50 µs) breakdown voltages of palm oil (PO), coconut oil (CO) and mineral oil (MO) in a quasi-uniform sphere to sphere electric field at two gap distances. The type of PO used in this study is Refined Bleached Deodorized Palm Oil (RBDPO) Olein type. The effect of voltage polarities (positive and negative) and testing methods (rising voltage, up and down and multiple level) on the lightning breakdown performance were investigated. The results indicated that lightning breakdown voltages of CO and RBDPO are comparable to those of MO under various test conditions. The results indicated that there is no polarity effect for lightning impulse breakdown tests in a quasi-uniform field. The testing methods, including rising voltage method, up and down method and multiple level method have a notable influence on the breakdown voltages. The effect of the 50% breakdown voltage on rising voltage method, up and down method and multiple level method for RBDPO and CO is comparable to MO. The withstand voltage at 1% and 50% breakdown probabilities were obtained using the Normal distribution fitting on the cumulative probability plot of impulse shots. Based on a normal distribution fitting, withstand voltages 1% breakdown probability of POA were close to the MO. Finally, based on statistical studies and simulation using ANSYS software, the prediction formulas for breakdown voltage for larger gap distances for all samples were derived.

THE EFFECT OF OIL PALM KERNEL SHELL IN PRODUCING DIFFERENT TYPES OF POFA BASED MORTAR

2015 ◽  
Vol 77 (12) ◽  
Author(s):  
Nor Hasanah Abdul Shukor Lim ◽  
Mohd Warid Hussin ◽  
Abdul Rahman Mohd. Sam ◽  
Mostafa Samadi ◽  
Mohamed A. Ismail ◽  
...  
Keyword(s):  
Palm Oil ◽  
Oil Palm ◽  
Palm Kernel ◽  
High Volume ◽  
Strength Development ◽  
Palm Oil Fuel Ash ◽  
Palm Kernel Shell ◽  
Fuel Ash ◽  
Different Types ◽  
Oil Fuel

This paper presents the utilization of palm oil fuel ash and oil palm kernel shell as cement and sand replacement, respectively in the production of palm oil fuel ash based mortar mixes as part of new and innovative materials in the construction industry. The study includes basic properties such as water absorption, density, compressive strength, and microstructure test with regards to variations in the mix design process. In order to get better performance in terms of strength development, the ash used was subjected to heat treatment and grounded to the size of less than 2 µm. High volume of 80% palm oil fuel ash was used as cement replacement, while 25%, 50%, 75%, and 100% of oil palm kernel shell was used as sand replacement. The results indicated that the density of the mortar decreases with increasing volume of oil palm kernel ash as sand replacement. Three different types of mortar were produced with different percentages of oil palm kernel shell, which was high strength, medium strength, and low strength lightweight mortars.

scholarly journals Explaining the “Certification Gap” for Different Types of Oil Palm Smallholders in Riau Province, Indonesia

2019 ◽  
Vol 28 (3) ◽  
pp. 253-281 ◽  
Author(s):  
Sakti Hutabarat ◽  
Maja Slingerland ◽  
Liesbeth Dries
Keyword(s):  
Survey Data ◽  
Palm Oil ◽  
Oil Palm ◽  
Management Practices ◽  
Oil Products ◽  
Rapid Expansion ◽  
Current Management ◽  
Limited Success ◽  
Certification Standards ◽  
Different Types

Indonesia is the world’s largest producer of palm oil, and its smallholder oil palm plantations involve more than 2.3 million farmers. The rapid expansion of the oil palm area, and resulting negative environmental and social impacts, has increased the demand for sustainability certification for palm oil products. This study investigates whether different types of smallholders face different barriers in complying with certification standards. The study uses survey data from 829 smallholders in Riau, Sumatra. First, an assessment is made of the gap between current management practices and practices required by Roundtable on Sustainable Palm Oil standards for different types of smallholders. Second, the article explores explanations for the gap between current and required practices. Finally, an investigation is made of the different starting points of different types of smallholders. Results indicate that the diversity between smallholders affects their prospects for certification. To date, this diversity in smallholders has not been taken into account in the application of Roundtable on Sustainable Palm Oil standards. This can help to explain the limited success of smallholder certifications in Indonesia.

scholarly journals Protein-Stabilized Palm-Oil-in-Water Emulsification Using Microchannel Array Devices under Controlled Temperature

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4805
Author(s):  
Takashi Kuroiwa ◽  
Miki Ito ◽  
Yaeko Okuyama ◽  
Kanna Yamashita ◽  
Akihiko Kanazawa
Keyword(s):  
Palm Oil ◽  
Sodium Caseinate ◽  
Droplet Generation ◽  
Basic Material ◽  
Operation Conditions ◽  
Microchannel Array ◽  
Oil In Water ◽  
Mean Diameter ◽  
Different Types ◽  
Semi Solid

Microchannel (MC) emulsification for the preparation of monodisperse oil-in-water (O/W) and water-in-oil-in-water (W/O/W) emulsions containing palm oil as the oil phase was investigated for application as basic material solid/semi-solid lipid microspheres for delivery carriers of nutrients and drugs. Emulsification was characterized by direct observation of droplet generation under various operation conditions, as such, the effects of type and concentration of emulsifiers, emulsification temperature, MC structure, and flow rate of to-be-dispersed phase on droplet generation via MC were investigated. Sodium caseinate (SC) was confirmed as the most suitable emulsifier among the examined emulsifiers, and monodisperse O/W and W/O/W emulsions stabilized by it were successfully obtained with 20 to 40 µm mean diameter (dm) using different types of MCs.

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