Articles
<![CDATA[Maximum Power Point Tracking of Photovoltaic System for Traffic Light Application ]]>
<![CDATA[Muhida, Riza]]>;
<![CDATA[Mohamad, Nor Hilmi]]>;
<![CDATA[Legowo, Ari]]>;
<![CDATA[Irawan, Rudi]]>;
<![CDATA[Astuti, Winda]]>
<![CDATA[ Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 1 (2013) ]]>
Publisher : <![CDATA[Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences ]]>
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DOI: 10.14203/j.mev.2013.v4.57-64
<![CDATA[Photovoltaic traffic light system is a significant application of renewable energy source. The development of the system is an alternative effort of local authority to reduce expenditure for paying fees to power supplier which the power comes from conventional energy source. Since photovoltaic (PV) modules still have relatively low conversion efficiency, an alternative control of maximum power point tracking (MPPT) method is applied to the traffic light system. MPPT is intended to catch up the maximum power at daytime in order to charge the battery at the maximum rate in which the power from the battery is intended to be used at night time or cloudy day. MPPT is actually a DC-DC converter that can step up or down voltage in order to achieve the maximum power using Pulse Width Modulation (PWM) control. From experiment, we obtained the voltage of operation using MPPT is at 16.454 V, this value has error of 2.6%, if we compared with maximum power point voltage of PV module that is 16.9 V. Based on this result it can be said that this MPPT control works successfully to deliver the power from PV module to battery maximally.]]>
<![CDATA[Solar-Based Fuzzy Intelligent Water Sprinkle System ]]>
<![CDATA[Muhida, Riza]]>;
<![CDATA[E. Salami, Momoh Jimoh]]>;
<![CDATA[Astuti, Winda]]>;
<![CDATA[Bt Ahmad Kasim, Nurul Amalina]]>;
<![CDATA[Rahayu, Nani]]>
<![CDATA[ Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 2, No 2 (2011) ]]>
Publisher : <![CDATA[Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences ]]>
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DOI: 10.14203/j.mev.2011.v2.65-72
<![CDATA[A solar-based intelligent water sprinkler system project that has been developed to ensure the effectiveness in watering the plant is improved by making the system automated. The control system consists of an electrical capacitance soil moisture sensor installed into the ground which is interfaced to a controller unit of Motorola 68HC11 Handy board microcontroller. The microcontroller was programmed based on the decision rules made using fuzzy logic approach on when to water the lawn. The whole system is powered up by the solar energy which is then interfaced to a particular type of irrigation timer for plant fertilizing schedule and rain detector through a simple design of rain dual-collector tipping bucket. The controller unit automatically disrupted voltage signals sent to the control valves whenever irrigation was not needed. Using this system we combined the logic implementation in the area of irrigation and weather sensing equipment, and more efficient water delivery can be made possible. ]]>
<![CDATA[Design of a DC-AC Link Converter for 500W Residential Wind Generator ]]>
<![CDATA[Muhida, Riza]]>;
<![CDATA[Zaidi, Ahmad Firdaus A.]]>;
<![CDATA[Tamsir, Afzeri]]>;
<![CDATA[Irawan, Rudi]]>
<![CDATA[ Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 3, No 2 (2012) ]]>
Publisher : <![CDATA[Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences ]]>
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DOI: 10.14203/j.mev.2012.v3.95-102
<![CDATA[Â As one of alternative sources of renewable energy, wind energy has an excellence prospect in Indonesia, particularly in coastal and hilly areas which have potential wind to generate electricity for residential uses. There is urgent need to locally develop low cost inverter of wind generator system for residential use. Recent developments in power electronic converters and embedded computing allow improvement of power electronic converter devices that enable integration of microcontrollers in its design. In this project, an inverter circuit with suitable control scheme design was developed. The circuit was to be used with a selected topology of Wind Energy Conversion System (WECS) to convert electricity generated by a 500W direct-drive permanent magnet type wind generator which is typical for residential use. From single phase AC output of the generator, a rectifier circuit is designed to convert AC to DC voltage. Then a DC-DC boost converter is used to step up the voltage to a nominal DC voltage suitable for domestic use. The proposed inverter then will convert the DC voltage to sinusoidal AC. The duty cycle of sinusoidal Pulse-Width Modulated (SPWM) signal controlling switches in the inverter was generated by a microcontroller. The lab-scale experimental rig involves simulation of wind generator by running a geared DC motor coupled with 500W wind generator where the prototype circuit was connected at the generator output. The experimental circuit produced single phase 240V sinusoidal AC voltage with frequency of 50Hz. Measured total harmonics distortion (THD) of the voltage across load was 4.0% which is within the limit of 5% as recommended by IEEE Standard 519-1992.]]>
<![CDATA[RANCANG BANGUN MESIN PENGECAT OTOMATIS BERBASIS ARDUINO ]]>
<![CDATA[Muhammad Ilham Miranto]]>;
<![CDATA[Riza Muhida]]>;
<![CDATA[Muhammad Riza]]>
<![CDATA[ JURNAL TEKNIK MESIN Vol 9, No 1 (2021): Oktober ]]>
Publisher : <![CDATA[Universitas Bandar Lampung ]]>
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<![CDATA[Cat adalah cairan yang berfungsi untuk melindungi, memperkuat, dan memperindah. Pada proses pengecatan menggunakan metode penyemprotan (spray) adalah yang paling cepat, tetapi harus mengetahui jarak dan tekanan angin yang sesuai agar tidak terbuang ke udara bebas. Memodifikasi diameter lubang nozzle spray gun dapat dilakukan sehingga dapat menambah efisiensi saat proses pengecatan menjadi lebih cepat, dan tebal. Tetapi saat memodifikasi lubang nozzle spray gun memiliki batas disetiap masing masing type spray gun dalam penelitian ini jenis spray gun yang digunakan adalah type F75 dengan diameter aslinya 1,5mm kemudian dimodifikasi menjadi 1,8mm dan 2mm. Pada type ini saat perluas lubang nozzle lebih dari 2mm Jarum spray gun tidak dapat menutup rapat lubang nozzle sehingga terjadi kebocoran angin pada nozzle dan spray gun tidak efektif. Jarak spray gun ke objek juga sangat mempengaruhi dari pengujian. Maka dapat disimpulkan semakin dekat jarak sprayer ke objek maka ketebalan cat meningkat, semakin besar diameter nozzle maka hasil pengecatan juga semakin tebal dan setiap type nozzle memiliki batas perluasan diameter lubang nozzlenya.]]>
<![CDATA[Design an Inverter for Residential Wind Generator ]]>
<![CDATA[Riza Muhida]]>;
<![CDATA[Afzeri Tamsir]]>;
<![CDATA[Rudi Irawan]]>;
<![CDATA[Ahmad Firdaus A. Zaidi]]>
<![CDATA[ International Conference on Engineering and Technology Development (ICETD) 2012: 1st ICETD 2012 ]]>
Publisher : <![CDATA[Bandar Lampung University (UBL) ]]>
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<![CDATA[As one of alternative source of renewable energy, wind energy has an excellence prospect in Indonesia, particularly in coastal and hilly areas that has potential wind to generate electricity for residential use. There is urgent need to locally develop the low cost inverter of wind generator system for residential use. Recent developments of power electronic converters and embedded computing allow improvement of power electronic converter devices that enable integration of microcontrollers in its design. In this project, an inverter circuit with suitable control scheme design was developed. The circuit was to be used with a selected topology of Wind Energy Conversion System (WECS) to convert electricity generated by 500W direct-drive permanent magnet type wind generator which is typical for residential use. From single phase AC output of the generator, rectifier circuit is designed to convert AC to DC voltage. Then DC-DC boost converter was used to step up the voltage to a nominal DC voltage suitable for domestic use. The proposed inverter then will convert the DC voltage to sinusoidal AC. The duty cycle of sinusoidal Pulse-Width Modulated (SPWM) signal controlling switches in the inverter was generated by a microcontroller. The lab-scale experimental rig involves simulation wind of wind generator by running geared DC motor coupled with 500W wind generator where the prototype circuit was connected at generator output. Experimental circuit produced output voltage single phase 240V sinusoidal AC voltage with frequency of 50Hz. Measured total harmonics distortion (THD) of the voltage across load was 4.0% which is within limit of 5% as recommended by IEEE Standard 519-1992.]]>
<![CDATA[Indonesia’s Challenge to Combat Climate Change Using Clean Energy ]]>
<![CDATA[Rudi Irawan]]>;
<![CDATA[Afzeri Tamsir]]>;
<![CDATA[Riza Muhida]]>
<![CDATA[ International Conference on Engineering and Technology Development (ICETD) 2012: 1st ICETD 2012 ]]>
Publisher : <![CDATA[Bandar Lampung University (UBL) ]]>
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<![CDATA[Indonesia as the biggest archipelago country and situated in equator is very vulnerable to the adverse effect of climate change. There are two main categories of efforts to handle the issues in climate change; that are how to mitigate it and how to adapt to the change. One of the main culprits of climate change is the emission of carbon gas due to fossil fuel energy utilization contributing 302 million tonnes CO2 equivalent.President of the Republic of Indonesia in 2009 in the G-20 Meeting, Pittsburgh, USA, and in 2010 in COP 15 UNFCCC, Copenhagen, Denmark issued the national voluntary target to reduce greenhouse gas emission by year 2020 as much as 26% from business-as-usual by national domestic efforts. This emission reduction will further be improved as much as 41% from business-as-usual by international supports. The Government of Indonesia issued a national action plan to reduce greenhouse gases emission which is enforced by Presidential Regulation No. 61/2011. To achieve this target in energy sector,REFF-Burn (Reducing Emission from Fossil Fuel Burning) concept has been proposed by Sumiarso. Based on REFF-Burn Technology Portfolio, reducing emission from fossil-fuel burning is categorized in three different stages, which are pre-combustion, during combustion and post-combustion. In pre-combustion stage, utilization of clean energy is one of the wise choices. The perspective of the clean energy resources and utilization in Indonesia is discussed in this paper.]]>
<![CDATA[Rapid Prototyping and Evaluation for Green Manufacturing ]]>
<![CDATA[Afzeri Tamsir]]>;
<![CDATA[Rudi Irawan]]>;
<![CDATA[Riza Muhida]]>
<![CDATA[ International Conference on Engineering and Technology Development (ICETD) 2012: 1st ICETD 2012 ]]>
Publisher : <![CDATA[Bandar Lampung University (UBL) ]]>
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<![CDATA[With global awareness of environmental risk and the pressing needs to improve efficiency, manufacturing systems are growing into new concept. Green manufacturing is reflected to employ various green strategies and technique to produce with eco-efficient. Green manufacturing aspects on the machine level were studied in various machining process. On this paper presents the green manufacturing review of Rapid Prototyping process. The objective is to evaluate the factors involved in green process of RP. Several comparative RP process respect to green manufacturing criteria are described.Rapid Prototyping process uses three dimensional CAD files to fabricate a physical model. Models are usually made from variety of material such as ABS, rubber and specific metals. Each material has the environment impact during the process and recycling. RP process are known as process not suitable for making direct product. However, lates technology makes it suitable to produce the parts with reasonable cost. For near the future, the utilization of this technology is becoming increasing and green manufacturing effect should be considered. Based on study conducted, several type of RP process is eco-efficient due to amount of waste material produced and environment impact during the process. ]]>
<![CDATA[Indonesia’s Challenge to Combat Climate Change Using Clean Energy ]]>
<![CDATA[Rudi Irawan]]>;
<![CDATA[Afzeri Tamsir]]>;
<![CDATA[Riza Muhida]]>
<![CDATA[ International Journal of Engineering Science and Technology Development (IJEST) Vol 1, No 2 (2013): August ]]>
Publisher : <![CDATA[University of Bandar Lampung (UBL) ]]>
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<![CDATA[Indonesia as the biggest archipelago country and situated in equator is very vulnerable to the adverse effect of climate change. There are two main categories of efforts to handle the issues in climate change; that are how to mitigate it and how to adapt to the change. One of the main culprits of climate change is the emission of carbon gas due to fossil fuel energy utilization contributing 302 million tonnes CO2equivalent.President of the Republic of Indonesia in 2009 in the G-20 Meeting, Pittsburgh, USA, and in 2010 in COP 15 UNFCCC, Copenhagen, Denmark issued the national voluntary target to reduce greenhouse gas emission by year 2020 as much as 26% from business-as-usual by national domestic efforts. This emission reduction will further be improved as much as 41% from business-as-usual by international supports. The Government of Indonesia issued a national action plan to reduce greenhouse gases emission which is enforced by Presidential Regulation No. 61/2011. To achieve this target in energy sector,REFF-Burn (Reducing Emission from Fossil Fuel Burning) concept has been proposed by Sumiarso. Based on REFF-Burn Technology Portfolio, reducing emission from fossil-fuel burning is categorized in three different stages, which are pre-combustion, during combustion and post-combustion. In pre-combustion stage, utilization of clean energy is one of the wise choices. The perspective of the clean energy resources and utilization in Indonesia is discussed in this paper.]]>
<![CDATA[Rapid Prototyping and Evaluation for Green Manufacturing ]]>
<![CDATA[Afzeri Tamsir]]>;
<![CDATA[Rudi Irawan]]>;
<![CDATA[Riza Muhida]]>
<![CDATA[ International Journal of Engineering Science and Technology Development (IJEST) Vol 1, No 1 (2013): April ]]>
Publisher : <![CDATA[University of Bandar Lampung (UBL) ]]>
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<![CDATA[With global awareness of environmental risk and the pressing needs to improve efficiency, manufacturing systems are growing into new concept. Green manufacturing is reflected to employ various green strategies and technique to produce with eco-efficient. Green manufacturing aspects on the machine level were studied in various machining process. On this paper presentsthe green manufacturing review of Rapid Prototyping process. The objective is to evaluate the factors involved in green process of RP.Several comparative RP process respect to green manufacturing criteria are described.Rapid Prototyping process uses three dimensional CAD files to fabricate a physical model. Models are usually made from variety of material such as ABS, rubber and specific metals. Each material has the environment impact during the process and recycling.RP process are known as process not suitable for making direct product. However, lates technology makes it suitableto produce the parts with reasonable cost. For near the future, the utilization of this technology is becoming increasing and green manufacturing effect should be considered.Based on study conducted, several type of RP process is eco-efficient due to amount of waste material produced and environment impact during the process.]]>
<![CDATA[Message from the Editor in Chief ]]>
<![CDATA[Riza Muhida]]>
<![CDATA[ International Journal of Engineering Science and Technology Development (IJEST) Vol 1, No 3 (2013): December ]]>
Publisher : <![CDATA[University of Bandar Lampung (UBL) ]]>
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<![CDATA[Welcome to the Third Issue of International Journal of Engineering Science and Technology Development (IJEST) on December 2013. In this issue of IJEST, we present to our readers selected articles related to Engineering, Science and Computer and Tehnology. Five papers are presented from Indonesia, Malaysia and Saudi Arabia.The first article by Abdul Aziz Ahmad and Assoc. Prof. Dr. Raihan Othman from International Islamic University Malaysia (IIUM), Malaysia with the title: Recent Advances in Biofuel Cell and Emerging Hybrid System. The second article by Prof. Dr. Priyo Suprobo,Faimun and Arie Febry from Institute Technology Surabaya (ITS), Indonesia with the title: Infrastructure Health Monitoring System (SHM) Development, a Necessity for Maintenance and Investigation . The third article by Dr. Riza Ainul Hakim, from King Abdulaziz University , Saudi Arabia, with the title: Seismic Assessment of RC Building Using Pushover Analysis The fourth article by Ida Bagus Ilham Maliki from Universitas Bandar Lampung, Indonesia with the title: Public Transport Crisis in Bandar Lampung. The fifth article by Marzuki, Maria Shusanti F and Andala Rama Putra from Bandar Lampung University, Indonesia with the title: The E-Internal Audit ISO 9001:2008 Based on Accreditation Form Assessment Matrix in Study Program for Effectiveness of Monitoring Accreditation With these selections I sincerely hope that everyone has something to gain from this issue and thank you to article contributors and reviewers for making this issue possible. To all prospective author, we are welcome and please sent your article to the editors.]]>
