Anizar Indriani
Department of Electrical Engineering Faculty of Engineering University of Bengkulu Jl. W.R. Supratman Kandang Limun Bengkulu

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Optimasi Penjadwalan Unit Pembangkit Thermal dengan Dinamics Programming Indriani, Anizar
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2006
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

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Abstract

Makalah ini membahas operasi sistem tenaga dengan total biaya operasi pembangkit yang optimal dengan metode dinamics programming. Pembangunan yang sangat pesat pada saat ini menyebabkan dibutuhkannya pembangunan unit-unit pembangkit guna menunjang kebutuhan akan konsumsi energi listrik. Penyaluran daya listrik dari pusat pembangkit melalui saluran transmisi ke pusat beban harus berlangsung dengan baik, dapat menghindari dan mengatasi segala yang dapat menjadikan sistem tenaga beroperasi pada kondisi operasi abnormal. Gangguan yang terjadi pada sistem tenaga ini dapat disebabkan oleh beberapa faktor seperti pembebanan, petir, proses switching dan lainya. Perubahan beban secara tiba-tiba dapat menyebabkan terjadinya penurunan frekuensi pada generator. Penelitian ini membahas tentang penjadwalan unit pembangkit thermal dengan metode dinamics programming pada sistem interkoneksi Sumbar dengan biaya yang optimal.Kata kunci: optimal, pembangkit, dinamics programming
Pemanfaatan Sensor Suhu LM 35 Berbasis Microcontroller ATmega 8535 pada Sistem Pengontrolan Temperatur Air Laut Skala Kecil Indriani, Anizar; Johan, Johan; Witanto, Yovan; Hendra, Hendra
Rekayasa Mesin Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

System of temperature control are used in many facility such as room temperature control, quality control of food and drink, electronic equipment control and etc. control of temperature can be done by using microcontroller as a media processing and process the changes of temperature that occured to the voltage. One of supporting component on the microcontroller to detect the change of temperature is temperature sensor LM 35 which in this study we will focus on the temperature sensor LM 35 for detect of change of temperature on the sea water in a small scale. the purpose of this study is to determine the ability and performance of temperatur sensor LM 35 for detect the changes of temperature sea water and check the condition of temperatur sensor LM 35 in use on the sea water. The results show that the temperature sensor of LM 35 can be used to measure the changes of temperatur sea water without have higher difference on the actual value and experiment results. the range of difference is smaller and the temperature sensor of LM 35 can be used to measured the change of temperature of sea water.Keywords: LM 35 Sensor, Microcontroller ATmega 8535, Sea Water Temperature
PELATIHAN TEKNIK PENGELASAN BAGI MASYARAKAT USIA PRODUKTIF UNTUK PRODUK REAL ESTATE, KANTOR PEMERINTAHAN DAN PELAYANAN MASYARAKAT Indriani, Anizar; Witanto, Yovan
DHARMA RAFLESIA Vol 13, No 2 (2015): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v13i2.4246

Abstract

Welding process become a major part for small and large industries. Large industries using welding processes for cutting process plates, connecting plates, connecting pipelines and other components of the repair process. For small industries, welding process is used to maintenance and repair the automotive components industry that damaged, the manufacture of household appliances, office or public billboards. The demand for the product  of the welding process is increasing depend of area developing such as for home appliances, office or public billboard is very high demand due to the increase of residential property, real eastate, development and other areas of the city. The demand of the welding process product can not much utilized in Central Bengkulu district, where orders for the manufacture of a product housing, offices or billboards only mastered by a few workshops. High demand, the availability of garages or welding industries is few that make employment opportunities are very high. But this demand needs to be supported by human resources capable of using a welding machine. In this community service given basic training in welding techniques to help people in Central Bengkulu especially Talang Empat and Taba Terunjam in exploiting existing this opportunities. Training provided is use of the welding machine to make a trellis, fence or a seat with the type of welding machine capable of TIG or MIG welding. The results of welding training shows that people who can not follow the formal and informal education has a high desire for this training. This is to improve they skill, economy and living standards by utilizing the welding knowledge to create new jobs or working with existing workshops. Keywords: Fence, Trellis, Welding, Productive Age, Training  
PEMANFAATAN SISTEM PENGERING MENGGUNAKAN MIKROKONTROLERGENUINO UNO DAN SOLAR SELUNTUK PENGOLAHAN HASIL PERTANIAN MASYAKARAKAT DESA PASAR PEDATI DAN DESA HARAPAN Indriani, Anizar; Hendra, Eng; Witanto, Yovan
DHARMA RAFLESIA Vol 15, No 2 (2017): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v15i2.4055

Abstract

The daily life of the people in Pasar Pedati Village and Harapan Village, Central Bengkulu Regency, especially the housewives is processing agricultural products such as cassava, copra, and banana.Cassava is made into cassava chips and rengginang. This devotional activity aims to transfer technology and science in processing agricultural products and help villagers to create versatile dryers.This versatile drying machine works by utilizing solar and heat energy absorbed by copper plates where the heat is insulated using a glass layer.Heat utilization is made by copper plate so it must be made with transparent glass design on the top and around the wall of the dryer.The frame of the glass stand is made of aluminum and is assembled using a rivet.The process of choosing and making of this drying machine involves the people of Pasar Pedati Village and Harapan Village, both men and women. Most of the men in Pasar Pedati Village work on farming and also work outside the village, so that during the day there are housewives working on the process of drying their crops.With this versatile drying machine training, Pasar Pedati and Desa Harapan villagers are particularly enthusiastic in training. Because these dryers are very helpful for them in processing the crops better, cleaner, and the time is not too long.Drying process with this drying machine also does not require a large area. Drying cassava made into cassava chips and rengginang takes about 2-3 hours, compared to manual drying done by drying the open yard takes 12-16 hours.The society can make this tool itself in order to increase their income.Keywords: dryer machine, cassava, aluminum copra, solar cell
PEMBUATAN MESIN PENGERING KELAPA MENGGUNAKAN SUMBER ENERGI TERBARUKAN UNTUK MENINGKATKAN PENDAPATAN MASYARAKAT KECAMATAN PONDOK KELAPA KABUPATEN BENGKULU TENGAH Hendra, Hendra; Suhartini, Yenni; Indriani, Anizar; Hernadewita, Hernadewita
DHARMA RAFLESIA Vol 15, No 1 (2017): JUNI
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v15i1.4236

Abstract

IbM community service aims to help villagers to make coconut drying machine. This dryer can help people in the processing a crops product with high water content quality, hygienic, short time and are not dependent on climate or weather. This machine mechanism can help the farmers in processing coconut plantations product, especially in the process of drying the crop so that sale value of dried coconut is high and incomes become increase. In the previous drying method, the coconut is drying by the open system where as the method is dependent on natural and climatic conditions. This is very detrimental to the community because of losses in terms of drying time, the water quality and higyenis product is low and other unsecured cause dry oil prices to be low. By using a drying machine the drying time is shorter, water content and quality of drying can be controlled and hygiene will also be maintained. Increased levels of water quality and hygiene product drying will make the selling price of coconut increases. Increased selling prices will impact on people's incomes so that the welfare of society for the better copra producer. In addition to the increase in people's income, it is a national issue of poverty alleviation, employment generation and application of new technology-based products in the country will be met. This community service is done at the Village Pasar Pedati and Village Harapan District of Pondok Kelapa through training how to make the dryer machine so that people can make this tool in order to increase their income as both a producer of copra with maintained quality as well and the creator of this drying machine. From the results of devotion performed shows that the people be able to make the dryer machine with a drying time of wet coconut weighing 1.4 kg to 1 kg within 7 hours, the water content of 40% decreased to 28% and an average temperature of 65ºC. Keywords: dried coconut drier machine, solar energy 
PEMBUATAN GENERATOR SINKRON UNTUK PEMBANGKIT LISTRIK TENAGA MIKROHIDRO DARI MAGNET MOTOR BEKAS DI DESA KEMUMU BENGKULU UTARA ., Hendra; Syaiful, Muhammad; Indriani, Anizar
DHARMA RAFLESIA Vol 12, No 2 (2014): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v2i12.3422

Abstract

Community empowerment in improving the knowledge to make a generator by using the recycle of magnet of the motorcycle is part of a community service-based research throughtraining manufacture of generators. This generator can be used to change of mechanicalenergy into the electrical energy. Where as the mechanical energy is obtained from theturbine screw. This training method contains material about the introduction of thegenerator and proceed with the process of manufacture of generators by using recycle ofmotorcycle magnet coil manner. Generators are made tested with the 3 phase of motors asearly movers to get the magnitude of the voltage output of the generator. After the outputvoltage is obtained then followed by using the turbinesscrew, windmills or otherpropulsion to drive the generators. Magnet motor that is made into a generator consists ofseveral magnetic poles are 6, 8 and 12 poles. Mechanism of the generator is expected tohelp the community in generating electrical energy as a power source of the electricalpower and that does not depend anymore on electricity company such as PLN for lighting,drying, cooling and others. Through this training, the potential flow of a river or irrigation water in the village of Kemumu can be utilized by the villagers to meet the need forelectrical energy. Where electrical energy can be used to increasing the economy valueand daily life of rural communities Kemumu. Of the training conducted, it was found thatthe generator capable of producing an electrical voltage of 106 volts with the rotationdrive of screw turbines is 876 rpm and 12 pole magnet generator. The generator with anoutput voltage of 6 obtained by 78, 4 Volt with one load of 15-watt incandescent light bulb.And using four load of 15-watt incandescent light bulbs obtained 58,8 Volt output voltageby using a magnetic generator 8 poles. From these results can be concluded that thegenerators by using the recycle magnet of motorcycle by the community can generate an electric voltage.Keywords: Generator, PLTMH, Electrical Energy, Magnet Motor, Turbin Screw
PENDAMPINGAN PROGRAM ALIH TEKNOLOGI MESIN PEMOTONG SAYURAN UNTUK PENINGKATAN USAHA KUE TRADISIONAL YANG BERKUALITAS Witanto, Yovan; Hendra, Hendra; Indriani, Anizar
DHARMA RAFLESIA Vol 17, No 2 (2019): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v17i2.10071

Abstract

Pematang Gubernur, Muara Bangkahulu District, Bengkulu City, is a town where many people do small business making and selling traditional cakes or fried foods. This business uses vegetables, such as potato, carrot, cabbage   as base ingredients.  However, the people have not yet used technology to help them do the work, especially for the vegetable cutting process. Hence, they lack of time efficiency and consistency in size of the cut food. To overcome this, technology is needed in the form of a multipurpose vegetable cutting machine capable of cutting large capacity vegetables in no time. This community service activity aims to assist technology transfer programs to the community. The team of this program introduces the vegetable cutting machines, as well as providing and motivating ways to create, install and use vegetable cutting machines. Methods used in this program include assisting in the identification of vegetable / grass cutting machine components, design assistance, material selection and manufacturing of cutting machines and practice using cutting machines. The results show that participants are very interested in making and using the equipment. They expect the sustainability of this activity. Participants hope that this activity will be continued with training in making various forms of vegetable cutting mold. Different shapes of cutting is expected to get more attractive look of the food. 
Analisis Pengaruh Variasi Jumlah Kutub dan Jarak Celah Magnet Rotor Terhadap Performan Generator Sinkron Fluks Radial Indriani, Anizar
Electrician Vol 9, No 2 (2015)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

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Abstract

Intisari---Generator ditemukan secara luas dalam kehidupan sehari-hari, terutama dalam industri kelistrikan. Generator yang sering ditemukan adalah jenis generator aksial dan radial. Komponen utama dari generator adalah rotor, stator dan penggerak utama. Komponen utama dari generator ini memiliki unsur-unsur pendukung seperti kumparan, magnet dan banyak lagi. Fungsi rotor dan stator adalah untuk menghasilkan induksi medan magnet karena gerakan yang terjadi antara rotor dan stator. Penempatan stator dan komponen rotor tergantung pada jenis generator yang digunakan, ada stator yang didalam rotor dan ada yang di luar rotor. Kondisi pemasangan dan penempatan stator dan rotor, jumlah lilitan kumparan dan magnet dapat mempengaruhi kinerja generator. Seperti pada generator sinkron  fluks radial memiliki rotor sebagai magnet (magnet rotor) yang berada di luar llitan kumparan stator. Beberapa studi telah meneliti tentang pengaruh jumlah lilitan kumparan, magnet dan jarak celah udara dalam generator fluks aksial dan radial terhadap kinerja generator seperti adanya distorsi harmonik dan lain-lain. Dalam tulisan ini kita akan fokus pada pengaruh magnet rotor dengan variasi jumlah kutub  dan jarak celah udara  lilitan kumparan stator terhadap kinerja generator sinkron fluks radial. Hasil penelitian menunjukkan bahwa semakin kecil jarak celah udara magnet rotor dan stator coil maka tegangan yang dihasilkan lebih besar. Untuk jarak celah udaraudara magnet rotor dan lilitan kumparan  stator  1mm  dan 2mm pada putaran  rendah 200 rpm diperoleh tegangan 43,5 volt dan 39,2 volt untuk pengujian tanpa beban. Pada  pengujian berbeban diperoleh tegangan 30 volt dan 26,8 volt dengan jarak celah udara (gap) yang sama dan besarnya arus yang dihasilkan  0,21 mA. Kata Kunci---Generator sinkron fluks radial, jarak celah udara, variasi jumlah kutub, Tegangan, Arus. Abstract---Generators are found widely in everyday life, especially in the electricity industry. Generators that are often found are the type of axial and radial generator. The main component of the generator are rotor, stator and the prime mover. The main components of this generator has support elements such as coils, magnets and more. The function of the rotor and stator is to generate a magnetic field induction due to motion that occurs between the rotor and stator. Placement of stator and rotor component depending on the type of generator used, there is a stator in the rotor and some are outside the rotor. Conditions of installation and placement of the stator and rotor, the number of coil windings and magnets can affect the performance of the generator. As in the radial flux of synchronous generator has the rotor as magnet (magnet rotor) which are beyond the stator winding coils. Several studies have examined the influence of the number of winding coils, magnets and distance of air gap in the axial and radial generator to performance of the generator such as harmonic distortion and others. In this paper we will focus on the study of the influence of the magnetic pole variation and air gap distance rotor and stator coil windings to the performance of a synchronous generator. The results show that the smaller the air gap distance magnet rotor and the stator coil winding voltage generated greater. For the distance of air gap and coil magnet motor stator coil 1mm and 2mm at low rpm to 200 rpm are obtained a voltage of 43.5 volts and 39.2 volts for no-load testing and for testing by using load are obtained  voltage of 30 volts and 26.8 volts with the gap distance equal and a current of 0.21 mA. Keywords--- Radial flux of synchronous Generator , Distance of air gap , magnetic pole variation, Voltage, Current
JENIS MATERIAL PAHAT POTONG DAN RUN OUT TERHADAP KEKASARAN PERMUKAAN BENDA KERJA SILINDER PADA PROSES BUBUT Hendra, Hendra; Sutarmadi, Sutarmadi; Indriani, Anizar; Hernadewita, Hernadewita
Jurnal MEKANIKAL Vol 4, No 2 (2013): JM Vol. 4 No. 2, Juli 2013
Publisher : Jurnal MEKANIKAL

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Abstract

Machining process is part of the production process where cutting process of work piece is done by using machine tools. Machine tools are used in the machining process includes lathe machines, milling machines, shaping machines, drilling machines and other machine tools. For a cylindrical work piece the cutting process can be done by using a lathe. Lathe process can make cylindrical objects, holes, taper and other forms. In the cutting process of work piece with a lathe machine are required high accuracy and precision especially for work piece such as shafts , pistons and objects that serve as a connecting other components. Work piece with high accuracy and precision can be obtained by use the reliable of machine tools, cutting condition, the selection of machining elements and material of cutting tools; operators have a skill for operation of machine tools. Cutting conditions such as mounting work pieces that are not center (run out) or overhang of work piece with strong pressure between head stock and tail stock can be resulting deflection. Run out and deflection happened can be cause the cutting force is not uniform. Therefore cause damage to the work piece and machine. Damage on the work piece can be seen from the quality of the cutting (surface roughness) and for machine on the case of chatter or vibration arising from the cutting force. In this paper we will focus to determine the effect of cutting tools material and run out of material on the surface roughness where as machining element used is the depth of cut and feeding. Work piece used is made of medium carbon steel.
SISTEM KONTROL KEKERUHAN DAN TEMPERATUR AIR LAUT MENGGUNAKAN MICROCONTROLLER ARDUINO MEGA Indriani, Anizar; Witanto, Y; Supriyadi, Supriyadi; Hendra, Hendra
Jurnal Teknik Mesin Vol 6, No 3 (2017)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v6i3.1830

Abstract

Sistem kontrol merupakan bagian yang tidak dapat dipisahkan dalam kehidupan sehari-hari.. Saat ini penerapan sistem kontrol telah menjamah bidang perkebunan, perikanan ataupun pertanian. Dalam penelitian ini, sistem kontrol akan diterapkan pada proses budidaya perikanan seperti budidaya ikan kerapu. Dimana ikan kerapu memiliki habitat dengan kondisi air laut dengan kadar garam 30 - 33 ppt, kadar oksigen ± 4 ppm, temperatur air laut 240 - 310C dan kadar keasaman (pH) air laut 7,6 - 7,8. Kecepatan arus air ideal sekitar 20 hingga 40 cm/detik dimana diperlukan untuk pergantian air dan oksigen serta untuk mengalirkan sisa metabolisme ikan serta pakan ikan keluar. Kondisi habitat ikan ini harus dpat dikontrol dengan baik. Di beberapa tempat budidaya ikan kerapu sistem penjagaan kondisi habitat ini dilakukan secara manual. Dengan adanya sistem kontrol, kondisi habitat ini akan sangat mudah dijaga. Dimana dalam penelitian ini difokuskan pada kemampuan sistem kontrol kekeruhan dan temperatur air laut meliputi fungsi sensor, waktu kerja pengontrol dan kinerja peralatan kontrol. Perangkat pengontrol menggunakan microcontroller Arduino Mega dengan beberapa sensor temperatur dan kekeruhan. Sensor temperatur menggunakan tipe DS18S20 dan untuk kontrol kekeruhan menggunakan sensor turbidity. Dari hasil pengujian didapatkan bahwa sistem kontrol ini dapat mengatur dan menjaga kadar kekeruhan dan temperatur air laut dengan arus 0.215 A untuk satu relay dan 0.33 A untuk 3 relay. Untuk kekeruhan dibutuhkan waktu yang dibutuhkan untuk kontrol aktif yaitu 15 detik dengan indikator kekeruhan dari pakan ikan sebanyak 50 gram dan 10 liter air. Untuk kapasitas yang lain 15 liter air didapatkan waktu kontrol aktif pada 40 detik dengan jumlah pakan 50 gram. Hal ini menunjukkan kontrol kekeruhan bekerja dengan baik dengan semakin keruh air laut semakin cepat bekerja sistem kontrol menggantikan air laut untuk tetap menjaga habitatnya. Waktu yang dibutuhkan untuk menurukan temperatur 1.270C adalah 6 menit 37 detik dengan kapasitas 10 liter