673 research outputs found
ANALISA PENGARUH PENGGUNAAN HYDROFOIL NACA 0009 PADA SUDU-SUDU TURBIN AIR CROSS-FLOW PADA PEMBANGKIT LISTRIK TENAGA MIKROHIDRO
No full textANALISA PENGARUH PENGGUNAAN HYDROFOIL NACA 0009 PADA SUDU-SUDU
TURBIN AIR CROSS-FLOW PADA PEMBANGKIT LISTRIK TENAGA
MIKROHIDRO
Muhamad Azfar
Jurusan Teknik Mesin Fakultas Teknologi Industri Institut Teknologi Nasional Malang Jl. Raya
Karanglo KM. 2 Malang, Indonesia
E-mail : [email protected]
ABSTRAK
Pembangkit listrik tenaga mikrohidro merupakan salah satu solusi yang dapat di gunakan untuk
masalah krisis energi yang terjadi di dunia saat ini. Turbin cross-flow merupakan salah satu jenis
turbin yang sering di gunakan untuk PLTMH. Pengaplikasian hydrofoil NACA pada sudu – sudu
turbin cross-flow dengan seri NACA 0009 pada penilitian ini. Tujuan yang ingin dicapai adalah
untuk mengetahui seberapa besar pengaruh sudu jenis hydrofoil NACA 0009 terhadap performa
turbin air cross-flow. Metode penelitian yang digunakan dengan memberikan variasi head yaitu
0.5m, 0.75m, 1m, dan variasi guide vane sebesar 0°, 15°, 30°, 45°, 60°. Setelah melakukan
perancangan pada turbin air cross-flow dilakukanlah pengujiannya dengan menggunakan alat ukur
tachometer, avometer, busur derajat, timbangan tarik, stopwatch, gelas ukur, jangka sorong.
Kemudian, didapatkan hasil perhitungan bahwa dengan pengaplikasian Naca 0009 pada sudu
turbin crossflow didapatkan daya turbin tertinggi terletak head 1 m dengan bukaan guide vane 60°
yaitu sebesar 19,813 W, sedangkan daya teoritis tertinggi terletak head 1 m dengan sudut guide
vane 60° yaitu sebesar 139,2 W, untuk kecepatan putaran poros tertinggi yang didapatkan yaitu
sebesar 189,3 rpm. Dan efisiensi turbin tertinggi sebesar 87,061 %.. Dengan demikian penggunaan
NACA 0009 pada sudu turbin air cross-flow mendapatkan hasil yang cukup baik
The process of piling work with bore pile method / Muhamad Afiq Azfar Mat Zin
No full textPractical training is a training industry that brings students closer about the real nature of construction jobs. Students are allowed to undergo practical training in the government sector or the private sector and students are allowed to apply for a place was selected by self. During the 16 weeks of practical training at the project site in Jeli, I have identified several topics of study in accordance with the work done on the construction site and after discussion with my supervisor what title that suitable for final report. I chosen the title The process piling work with bore pile method. The real aim of the practical training is to provide an opportunity for students to practice the theory learned in the classroom and used for real work in industries. So students can acquire new knowledge and great experience during this Industrial Training while it helps the students to get jobs. In conclusion, this is absolutely compulsory industrial training conducted for all students because it is the best method to expose students to real working conditions on site
Fault classification in transmission line using single layer feed-forward network trained by extreme learning machine / Muhamad Azfar Abd Ghafar
No full textTransmission line with fast and accurate fault classification is very important for protection and safety manner. The presence of distorted signals will cause the transmission line fail to classify definitely the fault that occurred. There are many impacts if the failure to classify fault in transmission line happen such as waste of time, high maintenance cost, and the device itself will having problem. Thus, it is important to provide a good fault classification in transmission line even though the signals are distorted by noise. This paper present a study of fault classification in transmission line with a combination of wavelet transform (WT) and single layer feed-forward network (SLFN) trained by Extreme Learning Machine (ELM) algorithm. The WT is used to decompose the input of three-phase current signal produced by the three-phase transmission line model and extract it into desired features. In this paper, the energy and mean features are been selected. The SLFN is trained by an algorithm named Extreme Learning Machine (ELM). The extracted features will be fed up into SLFN to classify the fault. Classification performance of SLFN is evaluated by using two types of dataset which are dataset without noise and another dataset with Signal to ratio (SNR) 30 dB. The results of this work show that fault classification using SLFN trained by ELM has high accuracy on estimating fault in transmission line system
Fault classification in transmission line using single layer feed-forward network trained by extreme learning machine / Muhamad Azfar Abd Ghafar
No full textTransmission line with fast and accurate fault classification is very important for protection and safety manner. The presence of distorted signals will cause the transmission line fail to classify definitely the fault that occurred. There are many impacts if the failure to classify fault in transmission line happen such as waste of time, high maintenance cost, and the device itself will having problem. Thus, it is important to provide a good fault classification in transmission line even though the signals are distorted by noise. This paper present a study of fault classification in transmission line with a combination of wavelet transform (WT) and single layer feed-forward network (SLFN) trained by Extreme Learning Machine (ELM) algorithm.
The WT is used to decompose the input of three-phase current signal produced by the three-phase transmission line model and extract it into desired features. In this paper, the energy and mean features are been selected. The SLFN is trained by an algorithm named Extreme Learning Machine (ELM). The extracted features will be fed up into SLFN to classify the fault.
Classification performance of SLFN is evaluated by using two types of dataset which are dataset without noise and another dataset with Signal to ratio (SNR) 30 dB. The results of this work show that fault classification using SLFN trained by ELM has high accuracy on estimating fault in transmission line system
Preliminary phytochemical investigation of antimicrobial and antioxidative secondary metabolites from the stem extract of Leea indica (memali) / Muhamad Azfar Abd Jalil
No full textLeea indica is one of the herbal medicine that widely used by the locals in Malaysia. The current study focused on antibacterial and antioxidant properties from three different stem extracts of L. indica. Disk diffusion and Thin Layer Chromatography (TLC) bioautography were used to determine the antibacterial activity while radical scavenging method by using I, l-diphenyl-2-picrylhydrazyl (DPPH) solution was applied for screening of antioxidant compound on TLC and semi-quantitative dot blot assay. The phytochemicals screening showed negative result for alkaloids test but positive results for other compounds such as glycosides, tannins, saponins, and steroids. The extracts that were separated by using TLC method were screened for phytochemicals but only methanol (MeOH) extract showed the presence of phenolic compound. The disk diffusion assay showed that dichloromethane (DCM) extract have the strongest antibacterial activity on both Staphyloccous aureus and Staphyloccocus epidermidis with 6.3 mm and 7.0 mm average inhibition zone respectively at 50 mg/mL extract compare to petroleum ether (PE) and MeOH extracts. The PE extract showed strong inhibition against S. epidermidis with 6.3 mm average inhibition zone at 25 mg/mL concentration. The results of TLC bioautography also agreed with disk diffusion assay as inhibition zone were observed in DCM extract after compounds had been separated. Antioxidant compounds were observed in all extracts as yellow spot appear on TLC plates after spraying with DPPH solution, but only MeOH extract showed the strongest antioxidant activity even after the extract were diluted until 0.19 mg/mL concentration. The stem extracts of L. indica showed potential in terms of antibacterial and antioxidant properties. DCM extract showed most potential in terms of antibacterial activity. The MeOH extract only showed potential in terms of antioxidant activity due to common phenolic compounds that had already been reported as strong radical scavengers
Are you intended towards e-waste recycling?: a case of USM students / Muhamad Azfar Mohamad Zuhdi and Haziq Iskandar Hamdan
No full textNowadays, the proliferation of technological advancement in the electrical and electronic industry had led to the development of sophisticated devices which results in the increment of the obsolete rate of the lower device which tends to be waste electrical and electronic equipment (WEEE) (Sabbaghi, Esmaeilian, Raihanian, Behdad and Cade, 2015). Directing to the e-waste problem, this issue is a global concern as e-waste is a source for a load of toxic materials such as lead, cadmium, mercury, chromium and poly-brominated biphenyls. In addition, e-waste is a source of precious metals such as iron (Fe), copper (Cu), aluminium (Al), gold (Au), silver (Ag) and others (Madrigal-Arias et al, 2015). Furthermore, electronic waste contributed to the concentration of lead (Pb) to the landfills in the US (EPA, 2000)
Hand phone detector and jammer / Muhamad Helmi Jamil, Muhammad Azfar Abdullah Pani and Nik Mohamad Haris Murshidi Nik Hassan
No full textNowadays as we know almost everyone in this world would have at least one cell phone at their disposal. Having a hand phone is not a problem itself, but using it without any restriction and without knowing where and when is a problem. Due to a lot of misused in hand phone such as using it during class, prayer, disturbing patients in the hospital et cetera, we have decided to build a device that can detect and block the signal of the cell phone. It is called Hand phone detector and jammer. In order to block the device, first the device will detect the frequency of the hand phone and it will block the signal after it detects the cell phone. All hand phone transmit certain amount of radio frequency, so to block it the device will transmit approximately the same radio frequency as the cell phone to disrupt the communication between the cell phone and the radio base station in the tower. This is called denial of service attack
Artikel ADM Muhamad Rido
No full textStudents are a very important element in educational and teaching activities in schools. Educational institutions are established for the benefit of students. Therefore it needs to get enough attention from the implementation of education in order to achieve the objectives of national education as a whole.Therefore, as a prospective educator later, in order to be able to administer for students so that the learning process runs well it is necessary to understand about the administration of students / students. Therefore, the author tries to make a paper that discusses the administration of students
No time to dispose? a study on the correlations and its contributing factors affecting university students’ intention to practise e-waste / Muhamad Azfar Mohamad Zuhdi ... [et al.]
No full textE-waste is a serious environmental problem. This study examines the correlations and its contributing factors affecting the e-waste recycling intention level among university students. A cross-sectional design using a quantitative method was used in this research and out of 370 questionnaires distributed only 285 were useable for further analysis. Results showed that majority of the university students had an average level of e-waste recycling intention. The association between attitudes, environmental awareness, law and regulations, convenience of recycling facilities and service and e-waste recycling intention is significantly correlated with the e-waste recycling intention among university students. Findings showed that attitudes were the main factor affecting the e-waste recycling intention. Thus, this study contributes a greater understanding of e-waste recycling especially for university students as they are the educated community. As such, a proper e-waste recycling campaign is a collaborative effort to raise awareness on public as well as university students against the waste landing in landfills
ANALISA PENGARUH PENGGUNAAN HYDROFOIL NACA 0009 PADA SUDU-SUDU TURBIN AIR CROSS-FLOW PADA PEMBANGKIT LISTRIK TENAGA MIKROHIDRO
No full textPembangkit listrik tenaga mikrohidro merupakan salah satu solusi yang dapat di
gunakan untuk masalah krisis energi yang terjadi di dunia saat ini. Turbin cross
flow merupakan salah satu jenis turbin yang sering di gunakan untuk PLTMH.
Pengaplikasian hydrofoil NACA pada sudu – sudu turbin cross-flow dengan seri
NACA 0009 pada penilitian ini. Tujuan yang ingin dicapai adalah untuk mengetahui
seberapa besar pengaruh sudu jenis hydrofoil NACA 0009 terhadap performa turbin
air cross-flow. Metode penelitian yang digunakan dengan memberikan variasi head
yaitu 0.5m, 0.75m, 1m, dan variasi guide vane sebesar 0°, 15°, 30°, 45°, 60°. Setelah
melakukan perancangan pada turbin air cross-flow dilakukanlah pengujiannya
dengan menggunakan alat ukur tachometer, avometer, busur derajat, timbangan
tarik, stopwatch, gelas ukur, jangka sorong. Kemudian, didapatkan hasil
perhitungan bahwa dengan pengaplikasian Naca 0009 pada sudu turbin crossflow
didapatkan daya turbin tertinggi terletak head 1 m dengan bukaan guide vane 60°
yaitu sebesar 19,813 W, sedangkan daya teoritis tertinggi terletak head 1 m dengan
sudut guide vane 60° yaitu sebesar 139,2 W, untuk kecepatan putaran poros
tertinggi yang didapatkan yaitu sebesar 189,3 rpm. Dan efisiensi turbin tertinggi
sebesar 87,061 %.. Dengan demikian penggunaan NACA 0009 pada sudu turbin air
cross-flow mendapatkan hasil yang cukup baik
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