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Potensi Energi Listrik Pada Gas Buang Sepeda Motor Melda Latif; Nuri Hayati; Uyung Gatot S Dinata
Jurnal Rekayasa Elektrika Vol 11, No 5 (2015)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (916.887 KB) | DOI: 10.17529/jre.v11i5.2957

Abstract

The fossil energy sources dwindling due to the many needs, especially in industrial and automotive sectors which are the largest energy users and the highest waste heat-producing. This causes many alternative energy sources are developing, included thermal energy utilization. The research utilized waste heat energy from motorcycle exhaust pipe into electrical energy with using Thermo Electric Generator (TEG). By using the thermocouple principle, difference of temperature between hot and cold side of TEG resulted voltage. Testing was conducted with three points are on head, body and mouth of the exhaust pipe. The maximum output voltage is generated in the head is greater than the other positions. At the head of exhaust, the maximum output voltage which is generated by 1 modul, 2 modules and 3 modules of TEG on each other is 1.26 V, 2.27 V and 3.43 V respectively.
Analisa Proses Charging Akumulator Pada Prototipe Turbin Angin Sumbu Horizontal Di Pantai Purus Padang Latif, Melda; Nazir, Refdinal; Reza, Hamdi
JURNAL NASIONAL TEKNIK ELEKTRO Vol 2, No 1: Maret 2013
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1050.42 KB) | DOI: 10.25077/jnte.v2n1.91.2013

Abstract

Tenaga listrik merupakan kebutuhan vital untuk pembangunan ekonomi dan pembangunan sosial. Hampir semua aktifitas sehari-hari dan perindustrian tidak lepas dari penggunaan tenaga listrik. Akan tetapi tidak semua daerah bisa menikmati energi listrik karena keterbatasan jangkauan sumber energi listrik oleh Pembangkit Listrik Negara (PLN). Karena tidak semua daerah menerima pasokan listrik PLN, maka kita bisa mendapatkan energi listrik dari energi angin yang merupakan energi terbarukan dan ramah lingkungan. Energi listrik  yang berasal dari turbin angin sumbu horizontal disimpan di akumulator (baterai). Akumulator merupakan sumber energi listrik portable yang bisa digunakan dimana saja dan kapan saja. Energi listrik pada akumulator juga bisa habis jika digunakan terus menerus dan bisa diisi (charging) kembali dengan input listrik DC yang berasal dari sistem konversi energi angin. Output dari turbin angin sumbu horizontal ini adalah tegangan AC 3 fasa. Dalam penelitian ini digunakan transformator, rectifier, dan dioda sebelum diteruskan ke akumulator. Turbin angin sumbu horizontal dipasang di daerah pantai Purus Padang. Dari hasil penelitian didapatkan bahwa alat dan rangkaian yang dirancang bisa melakukan proses charging dengan kecepatan angin minimum yang diperlukan untuk menghasilkan tegangan output 12 Volt DC adalah 4,5 m/s atau dengan kecepatan putar generator turbin angin sebesar 450 rpm.Kata kunci: energi terbarukan, angin, turbin angin sumbu horizontal, akumulator, transformator, rectifier, dioda
Sistem Kendali Jarak Jauh Berbasis Web untuk Sistem Rumah Pintar Muharam, Mumuh; Latif, Melda; Saputra, Mahendri
JURNAL NASIONAL TEKNIK ELEKTRO Vol 7, No 3: November 2018
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (568.012 KB) | DOI: 10.25077/jnte.v7n3.502.2018

Abstract

Conventional control of electronic devices that still use manual on and off switches will limit the ability of public to  achieve energy saving. Therefore, application of automatic controller in form of smart home will make energy saving effort will easier to achieve.  This paper aims to design a system with concept of Internet of Things (IoT) for smart home application, by implementing a small computer device named Raspberry Pi which is used as server and control system. The principle of this system is to control electronic devices in a building through a local website using local internet network via a smart phone. The test results  show that the system is able to control seven AC equipment and three DC voltage electronical devices in simultaneously.  The system also able to display the status of each controlled electronics devices. Keywords : Internet of Things (IoT), Smart Home, Networked Control System (NCS), Raspberry Pi.AbstrakPengendalian piranti elekronika yang masih menggunakan cara konvensional yaitu dengan menyalakan dan mematikannya melalui saklar manual, akan membatasi upaya masyarakat untuk melakukan penghematan energi listrik. Karena itu penggunaan system kendali yang terintegrasi dalam bentuk rumah pintar (smart home) akan membuat upaya penghematan energi lebih mudah dilakukan. Tujuan makalah ini adalah untuk membuat sebuah sistem yang menerapkan konsep Internet of Things (IoT) dan sistem kendali jaringan (NCS) untuk aplikasi rumah pintar, dengan mengimplementasikan sebuah perangkat komputer berukuran kecil bernama Raspberry Pi yang digunakan sebagai server dan pengendali kerja sistem. Prinsip kerja dari sistem ini adalah pengendalian piranti elektronika dari jarak jauh pada sebuah bangunan melalui website lokal yang diakses menggunakan jaringan internet lokal melalui Smart phone. Dari hasil pengujian, sistem yang dibangun mampu mengendalikan tujuh peralatan bertegangan AC dan tiga alat elektronik tegangan DC sekaligus dan mampu menampilkan status masing-masing piranti elektronika yang dikendalikan. Kata Kunci : Internet of Things (IoT), Rumah Pintar, Sistem Kendali Jaringan, Raspberry Pi.
Energi Listrik dari Pengereman Regeneratif Sepeda Motor dengan Menggunakan Dinamo Sepeda Latif, Melda; Valdesio, Anugrah; Muharam, Mumuh
JURNAL NASIONAL TEKNIK ELEKTRO Vol 7, No 2: July 2018
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (727.579 KB) | DOI: 10.25077/jnte.v7n2.503.2018

Abstract

Regenerative breaking is an energy recovery mechanism from wasted energy during breaking process. In a conventional breaking process, the kinetic energy from the wheel is converted into heat due to friction of the break disc.  In regenerative breaking, the kinetic energy is converted into electric energy by a dynamo. This research aims to find amount of electric power, voltage and current that can be generated from regenerative breaking. By adding a prototype which contains dynamo of bicycle, rectifier and dc-dc converter, the generative braking can change kinetic energy into electrical energy. In this research, three types of front wheel disc, i.e. with hard insulation, soft insulation and without insulations had been used for the experiment.. It is found that the best result is obtained by using hard insulation. For motorcycle speed at 70 km/hours, voltage, current and power values are 12,8 Volt, 130 mA and 1664 mWatt. The advantages of the hard insulation are less friction,  less heat dissipation and  quieter.  Keywords : Regenerative braking, motorcycle, isolation, wheel, dynamo of bicycle.
Simple HAWT Prototype Efficiency at Small Scale Wind Speed Melda Latif; Mumuh Muharam; Yonggi Puriza; Gusriwandi Gusriwandi
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 12, No 3: September 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v12i3.91

Abstract

Nowadays, the wind energy research for alternatif anergy has been progress. Wind energy can be found if the wind turbine is available. Based on rotation axis, wind turbin has been classified to Horizontal Axis Wind Turbine (HAWT) and Vertical Axis Wind Turbine (VAWT). This paper explains  simple HAWT prototype to 200 ohm resistor and LED at small scale wind speed. The blade material is acrilic. This material property is light, no easy broken, no corrosive and easy to find it. The blade model is flat plate section. Rotor diameter is 1 meter. The research was did at the beach. Permanent magnet synchronous generator is used to change wind energy to electric energy. The result shows that the generator increase linearly with wind speed. Measured wind speed was 1.9 m/s to 3.9 m/s. Average efficiency of HAWT prototype was 6.2% at delta connected load and 3.7% at wye connected load.
Penerapan Sampah Buah Tropis untuk Microbial Fuel Cell Melda Latif; Arif Dwi Fajri; Mumuh Muharam
Jurnal Rekayasa Elektrika Vol 16, No 1 (2020)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1054.055 KB) | DOI: 10.17529/jre.v16i1.15723

Abstract

Microbial Fuel Cell (MFC) is one tool that uses microbes to produce electrical energy. The main components of MFC support are anodes, cathodes, and salt bridges. In this paper, the application of tropical fruit waste to MFC is presented. Tropical fruit waste used here are pineapples, oranges, bananas, watermelons, mangos, and papayas. The fruit waste is extracted and fermented to produce microbial. The microbial produces ions attached to the anode. Measurement of system current and voltage is carried out using a digital multimeter. In pineapple substrate MFC, Voc has a maximum of 485 mV, maximum current density is 163 mA/m2 and maximum power density of 11mW/m2. The orange substrate obtained Voc maximum of 805 mV, maximum current density of 661 mA/m2 and maximumpower density of 62 mW/m2. Voc banana substrate has a maximum of 312 mV, maximum current density of 118 mA/m2 and maximum power density of 5.9 mW/m2. The Voc watermelon substrate has a maximum of 451 mV, maximum current density of 306 mA/m2 and maximum power density of 18.6 mW/m2. Voc mango substrate has a maximum of  586 mV, maximum current density of 229 mA/m2 and maximum power density of 4.3  mW/m2. Voc papaya substrate is a maximum of 338 mV, maximum current density of 58 mA/m2 and maximum power density of 2.9 mW/m2. These results show the potential for renewable electricity sources.
Optimal PV Placement to Reduce Power Loss and Improve Voltage in Distribution Network System Using K-means Clustering Method Syukri Yunus; Melda Latif; Darwison Darwison
Andalas Journal of Electrical and Electronic Engineering Technology Vol. 2 No. 1 (2022): May 2022
Publisher : Electrical Engineering Dept, Engineering Faculty, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (475.686 KB) | DOI: 10.25077/ajeeet.v2i1.19

Abstract

Placing the PV in the right location will maintain the utility voltage, but if the placement of PV in the wrong location will cause the stability of the system to be affected. In this study, optimization of PV placement uses the K-means Clustering method. This method will group each node in the system from the point of view of operating characteristics LSF (loss sensitivity factor) and dV (voltage deviation). The results of grouping each bus with the K-means Clustering method will be the basis for determining the location of PV placement in the IEEE 37 and 69 bus distribution systems. In this method, grouping results are used based on the size of the proximity and have the same characteristics with each other. In determining the optimal location for PV placement, the addition of PV will reduce power losses and improve voltage. Optimal PV location placement in the IEEE 37 bus distribution system is placed on 3 buses with a power capacity of 60% where the value of power losses drops to 176.2 kW and the voltage profile is the best but there are some buses that are still under voltage and overvoltage. Meanwhile, the most optimal PV location for the IEEE 69 bus distribution system is placed on a 6 bus with a power capacity of 60% where the value of power losses drops to 149.5 kW and the voltage profile of each bus is in normal condition..
Analisa Proses Charging Akumulator Pada Prototipe Turbin Angin Sumbu Horizontal Di Pantai Purus Padang Melda Latif; Refdinal Nazir; Hamdi Reza
JURNAL NASIONAL TEKNIK ELEKTRO Vol 2 No 1: Maret 2013
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1050.42 KB) | DOI: 10.25077/jnte.v2n1.91.2013

Abstract

Tenaga listrik merupakan kebutuhan vital untuk pembangunan ekonomi dan pembangunan sosial. Hampir semua aktifitas sehari-hari dan perindustrian tidak lepas dari penggunaan tenaga listrik. Akan tetapi tidak semua daerah bisa menikmati energi listrik karena keterbatasan jangkauan sumber energi listrik oleh Pembangkit Listrik Negara (PLN). Karena tidak semua daerah menerima pasokan listrik PLN, maka kita bisa mendapatkan energi listrik dari energi angin yang merupakan energi terbarukan dan ramah lingkungan. Energi listrik  yang berasal dari turbin angin sumbu horizontal disimpan di akumulator (baterai). Akumulator merupakan sumber energi listrik portable yang bisa digunakan dimana saja dan kapan saja. Energi listrik pada akumulator juga bisa habis jika digunakan terus menerus dan bisa diisi (charging) kembali dengan input listrik DC yang berasal dari sistem konversi energi angin. Output dari turbin angin sumbu horizontal ini adalah tegangan AC 3 fasa. Dalam penelitian ini digunakan transformator, rectifier, dan dioda sebelum diteruskan ke akumulator. Turbin angin sumbu horizontal dipasang di daerah pantai Purus Padang. Dari hasil penelitian didapatkan bahwa alat dan rangkaian yang dirancang bisa melakukan proses charging dengan kecepatan angin minimum yang diperlukan untuk menghasilkan tegangan output 12 Volt DC adalah 4,5 m/s atau dengan kecepatan putar generator turbin angin sebesar 450 rpm.Kata kunci: energi terbarukan, angin, turbin angin sumbu horizontal, akumulator, transformator, rectifier, dioda
Sistem Kendali Jarak Jauh Berbasis Web untuk Sistem Rumah Pintar Mumuh Muharam; Melda Latif; Mahendri Saputra
JURNAL NASIONAL TEKNIK ELEKTRO Vol 7, No 3: November 2018
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (568.012 KB) | DOI: 10.25077/jnte.v7n3.502.2018

Abstract

Conventional control of electronic devices that still use manual on and off switches will limit the ability of public to  achieve energy saving. Therefore, application of automatic controller in form of smart home will make energy saving effort will easier to achieve.  This paper aims to design a system with concept of Internet of Things (IoT) for smart home application, by implementing a small computer device named Raspberry Pi which is used as server and control system. The principle of this system is to control electronic devices in a building through a local website using local internet network via a smart phone. The test results  show that the system is able to control seven AC equipment and three DC voltage electronical devices in simultaneously.  The system also able to display the status of each controlled electronics devices. Keywords : Internet of Things (IoT), Smart Home, Networked Control System (NCS), Raspberry Pi.AbstrakPengendalian piranti elekronika yang masih menggunakan cara konvensional yaitu dengan menyalakan dan mematikannya melalui saklar manual, akan membatasi upaya masyarakat untuk melakukan penghematan energi listrik. Karena itu penggunaan system kendali yang terintegrasi dalam bentuk rumah pintar (smart home) akan membuat upaya penghematan energi lebih mudah dilakukan. Tujuan makalah ini adalah untuk membuat sebuah sistem yang menerapkan konsep Internet of Things (IoT) dan sistem kendali jaringan (NCS) untuk aplikasi rumah pintar, dengan mengimplementasikan sebuah perangkat komputer berukuran kecil bernama Raspberry Pi yang digunakan sebagai server dan pengendali kerja sistem. Prinsip kerja dari sistem ini adalah pengendalian piranti elektronika dari jarak jauh pada sebuah bangunan melalui website lokal yang diakses menggunakan jaringan internet lokal melalui Smart phone. Dari hasil pengujian, sistem yang dibangun mampu mengendalikan tujuh peralatan bertegangan AC dan tiga alat elektronik tegangan DC sekaligus dan mampu menampilkan status masing-masing piranti elektronika yang dikendalikan. Kata Kunci : Internet of Things (IoT), Rumah Pintar, Sistem Kendali Jaringan, Raspberry Pi.
Energi Listrik dari Pengereman Regeneratif Sepeda Motor dengan Menggunakan Dinamo Sepeda Melda Latif; Anugrah Valdesio; Mumuh Muharam
JURNAL NASIONAL TEKNIK ELEKTRO Vol 7, No 2: July 2018
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (727.579 KB) | DOI: 10.25077/jnte.v7n2.503.2018

Abstract

Regenerative breaking is an energy recovery mechanism from wasted energy during breaking process. In a conventional breaking process, the kinetic energy from the wheel is converted into heat due to friction of the break disc.  In regenerative breaking, the kinetic energy is converted into electric energy by a dynamo. This research aims to find amount of electric power, voltage and current that can be generated from regenerative breaking. By adding a prototype which contains dynamo of bicycle, rectifier and dc-dc converter, the generative braking can change kinetic energy into electrical energy. In this research, three types of front wheel disc, i.e. with hard insulation, soft insulation and without insulations had been used for the experiment.. It is found that the best result is obtained by using hard insulation. For motorcycle speed at 70 km/hours, voltage, current and power values are 12,8 Volt, 130 mA and 1664 mWatt. The advantages of the hard insulation are less friction,  less heat dissipation and  quieter.  Keywords : Regenerative braking, motorcycle, isolation, wheel, dynamo of bicycle.