Nurhalim Nurhalim, Nurhalim
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PHOTOVOLTAIC MODELING METHODS BASED ON MATLAB SIMULINK IMPLEMENTATION Zakri, Azriyenni Azhari; Nurhalim, Nurhalim; Simanulang, Dohardo P.H.; Tribowo, Ihwallibi
SINERGI Vol 22, No 1 (2018)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.331 KB) | DOI: 10.22441/sinergi.2018.1.001

Abstract

This paper presents photovoltaic system as a stand-alone electric power plant in the renewable energy development.  To maximize these stand-alone generators, it is necessary to design photovoltaic modeling to produce energy and maximum power.  The problems that exist in the design of PV systems are PV configuration, battery size, and the maximum power system. Therefore, this research will be proposed modeling Matlab/Simulink based PV system. The contribution of this research can provide various characteristics of the photovoltaic system with a capacity of 100 Wp.  This modeling is designed using Matlab/Simulink software.  The data generated from this simulation will provide a good reference for designing the stand-alone generators in the future.
PHOTOVOLTAIC MODELING METHODS BASED ON MATLAB SIMULINK IMPLEMENTATION Zakri, Azriyenni Azhari; Nurhalim, Nurhalim; Simanulang, Dohardo P.H.; Tribowo, Ihwallibi
SINERGI Vol 22, No 1 (2018)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2018.1.001

Abstract

This paper presents photovoltaic system as a stand-alone electric power plant in the renewable energy development.  To maximize these stand-alone generators, it is necessary to design photovoltaic modeling to produce energy and maximum power.  The problems that exist in the design of PV systems are PV configuration, battery size, and the maximum power system. Therefore, this research will be proposed modeling Matlab/Simulink based PV system. The contribution of this research can provide various characteristics of the photovoltaic system with a capacity of 100 Wp.  This modeling is designed using Matlab/Simulink software.  The data generated from this simulation will provide a good reference for designing the stand-alone generators in the future.
Analisis Ekonomi Penerapan Konservasi Energi Listrik Penerangan Jalan Umum Jalan Jendral Sudirman Kota Pekanbaru Adli, Rian; Nurhalim, Nurhalim
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

One of the efforts that can be done from the depletion of the electric energy sources supply was to reduce the consumption of electric energy. It can be applied to the streetlights without reduced the use of its value. Jendral Sudirman Street Pekanbaru is one of the arterial roads that used conventional lamp SON-T 250 Watt. The existing streetlights condition at Jendral Sudirman street was not standardize at all points that have been set because of it’s not appropriate specification and placement of the pole. The streetlights conservation at Jendral Sudirman street to the 150 Watt LED energy saving lamp be required investment cost of Rp 1,289,666,668, with the electrical energy savings of 15 264 kWh per month and electrical cost savings per month up to Rp 23,265,999.36. The economic analysis which is obtained from the streetlights conservation activities at Jendral Sudirman in the form of NPV (Net Present Value) as much Rp 957,717,056.10, Gross B / C (Gross Benefit Cost Ratio) 1,742, and the payback period of benefits obtained (Payback Period) for 5.727 years.Keywords : Conservation, LED, economic analysis, NPV, Gross B / C, Payback Periode
Pengaruh Tahanan Kaki Menara Type Gantry Terhadap Terjadinya Back Flashover Pada Isolator Saluran 115 Kv Pt. Chevron Pacific Indonesia Manik, Jefri; Ervianto, Edy; Nurhalim, Nurhalim
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This study describes analysis of tower footing resistance effected backflash voltage across a transmission line 115 kV insulator at PT. Chevron Pacific Indonesia. Back flashover analysis on insulator string provides ATP software for simulation. Analysis process is done by the entire transmission line parameter model such as a tower, lightning impulse, power line conductor and tower footing resistance. The factor of this study includes,front time of lightning stroke, and tower resistance. Simulations is done with lighting strike on the tower and mid-span with four types of impulse. To analysis of tower footing resistance effected back flashover across a transmission system insulator, Simulations are done by varying the tower footing resistance from 1Ω - 30Ω. Over Voltage on insulator for every tower footing resistance will be compare to critical flashover insulator (CFO) in order to obtain the maximum resistance is allowed to avoid the back flashover on insulator.Keyword: Tower fotting resistance, Back flashover, ATP, Insulator
Perancangan Mesin Penggulung Kumparan Transformator Berbasis Mikrokontroller Atmega8535 Gapita, Reinaldo Syas; Hamzah, Amir; Nurhalim, Nurhalim
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Transformer is a tool to transfer electricity power inter two or more electricity circuit through electro magnetic induction. Transformer consist of two parts, they are primary and secondary part, every part consist of several coils with the certain number and zise. In the making transformer, rolling process is made repeatedly in order to reach the standarized transformer criteria it took time and effort hardly to reduce this impact. It is needed a tool which can rool fastly and automaticly. This tool used 200Vac motor and 1350 RPM speed as the roller, so that it can reach the source electric power and fast speed for autoprocess. It uses ATMEGA8535 microcontroller as the main cycle where the microcontroller receive the number of coil through keypad interface. Microcontroller controls the roller motor by comparing the coils numbers which is entered by the coil numbers processed by the motor. The coil number detection processed by ten magnetic sensor through statical magnet which was available on the shaft of the motor. Comparatorchanges the sensor output voltage into digital pulses. This digital were counted by the microcontroller where every ten pulses equal one coils is same with the input number, it means the microcontroller shut down the motor.Keywords: Transformer, Motor, ATMEGA8535, Magnetic sensor, Comparator.
Optimasi Pembagian Beban Pada Sektor Pembangkitan Pekanbaru PLTD/G Teluk Lembu Pada BUS 20 KV Dengan Metode Newton Wahyu, Arbi; Firdaus, Firdaus; Nurhalim, Nurhalim
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The electricity demand always increases and electricity consumption too changes every time. The cost of power generation also changes when the electric load changes. planning is required to determine the portion of the generation of each plant in order to obtain an economical generation. In this study, solving solution using Newtons method aided with software Microsoft Office Excel and Matlab 2008b. The results of the testing that has been done, that PLTMG Haleyora operates at 08.00 am at 14.484 MW, while the maximum operating diesel from 10.00 am to 24.00 pm for 7 MW. while the peak load period all plants operate optimallyKeywords: Optimization, Load, Generation, Method Newton
Analisa Kinerja Proteksi Gardu Induk Garuda Sakti Menggunakan Software Berbasis Visual Basic 6.0 Febriyanty, Shely Ayu; Nurhalim, Nurhalim; Ali, Irsan Taufik
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

PT. PLN (Persero) Garuda Sakti Substation is the center of power settings and load demand as the center of security equipment power system as well as the enter of the process of normalization of the disturbances in the territory of Pekanbaru. The goal of research to determine the quantity of fault,protection performance, and reliability of Garuda Sakti Substation. Besides, produce useful software to calculate the percentage of the quantity of fault, the precentage of protection performanceand reliability of the substation by long outages. Type of this research is qualitative descriptive. Thecalculation is done using software based Visual Basic 6.0. From the data obtained, in 2013-2014 occurred 20 times faults in Transformers and Transmission 150 kV. Protection system that works when the interruption occurs 20 times in the Garuda Sakti Substation at 2013-2014, there are five kinds of relay is: relay OVR / UVR, relay REF / SBEF, rele DF / DT, rele rele UVLS and the entire PMT 150 KV rele has a 100% reliability. Garuda Sakti Substation has good reliability because LOLPvalue in 2013 amounted to 0,234953 days per year and in 2014 of 0,09023 days per year (suitable with the standards of PLN below or equal to 3 days per year).Keywords: Fault, Protection, ENS, LOLP, Reliability Substation, Visual Basic 6.0.
Karakteristik Bio-Briket Berbahan Baku Batu Bara dan Batang/Ampas Tebu terhadap Kualitas dan Laju Pembakaran Nurhalim, Nurhalim; Cahyono, Rochim Bakti; Hidayat, Muslikhin
Jurnal Rekayasa Proses Vol 12, No 1 (2018)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.22146/jrekpros.35278

Abstract

Indonesia has a very large fossil fuel source such as coal. In Indonesia, almost all power plants and industries use coal as solid fuel. Burning coal produces fly ash, bottom ash, poisonous gas and unused coal residue. The coal waste is commonly found in mining operations, abandoned mining areas, laboratories and power plants. This problem could be solved by producing bio-briquette using the coal waste. In this study, laboratory scale pyrolysis and non pyrolysis methods were used to produce bio-briquette using the coal waste with measurement of proximate analysis and burning rate. Pyrolysis was carried out at constant temperature of 400 oC for 2 hours. The total weight of briquette sample as much as 99.87 g was burnt at 400 oC with sufficient air space in the furnace. The waste coal was mixed with biomass bagasse and sugar cane stems before the briquetting process. The composition of the briquette material was 50 g of coal waste, 30 g of sugar cane biomass, and 10 g of bagasse. To form the briquette, tapioca was used as adhesive in addition to 5 g of clay with 50 mesh of size and application of 50 kg/cm2 pressure. The result of proximate analysis and combustion of the non-pyrolysis bio-briquette showed that non-pyrolysis bio-briquette contained 4.17 % of moisture content, 18.39% of fly ash, 25.56% of ash content, 5157.87 cal/g of calorific value. The mass of of pyrolysis bio-briquette (50 g) decreased to 30 g during 30 minutes, the compulsion reached maximum speed on 1.93 g/s and the smoke disappeared on the 24th minute The pyrolysis process on coal waste decreased the smoke and the addition of biomass increased the calorific value of bio-coal briquette.ABSTRAKIndonesia memiliki sumber energi fosil yang sangat besar seperti batu bara. Hampir seluruh pembangkit listrik dan industri di Indonesia menggunakan bahan baku batu bara. Batu bara memiliki limbah berupa flying ash, bottom ash, gas beracun dan sisa batu bara yang tidak terpakai. Limbah batu bara tidak terpakai banyak terdapat di pertambangan yang masih beroperasi, sisa lahan pertambangan, laboratorium, pembangkit listrik, sehingga perlu penanganan yang tepat seperti pembuatan briket bio-batu bara. Pada pembuatan briket bio-batu bara ini, batu bara diproses menggunakan metode pirolisis dan tanpa pirolisis dengan uji skala laboratorium seperti uji proksimat dan laju pembakaran. Proses pirolisis menggunakan suhu 400 oC selama 2 jam dan karbonisasi biomassa tanpa menggunakan parameter suhu dan waktu. Berat sampel briket sebesar 99,87 g dibakar pada suhu pembakaran 400 oC dengan menggunakan udara ruang didalam furnace. Sebelum proses pembriketan, batu bara yang telah mengalami proses pirolisis dan tanpa pirolisis dicampur dengan limbah biomassa ampas dan batang tebu. Variabel penelitian menggunakan 50 g limbah batu bara, 30 g biomassa batang tebu dan 10 g ampas tebu. Briket bio-batu bara menggunakan perekat tepung kanji dan tanah liat dengan berat masing–masing 5 g. Sedangkan untuk tingkat kelembutan setiap bahan briket adalah 50 mesh dengan kuat tekan 50 kg/cm2. Hasil analisis proksimat briket bio-batu bara PP (50 g) mengandung kadar air sebesar 4,17%, zat terbang 18,39%, kadar abu 25,56%, nilai kalori sebesar 5157,87 kal/g. Briket bio-batu bara PP (50 g) mengalami penurunan massa sebanyak 30 g selama 30 menit, laju pembakaran mencapai kecepatan maksimum 1,93 g/s dan asap hilang pada menit ke-24. Batu bara dengan proses pirolisis dapat menurunkan asap dan penambahan biomassa dapat menaikkan nilai kalori briket bio-batu bara.
Karakteristik Bio-Briket Berbahan Baku Batu Bara dan Batang/Ampas Tebu terhadap Kualitas dan Laju Pembakaran Nurhalim, Nurhalim; Cahyono, Rochim Bakti; Hidayat, Muslikhin
Jurnal Rekayasa Proses Vol 12, No 1 (2018)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.35278

Abstract

Indonesia has a very large fossil fuel source such as coal. In Indonesia, almost all power plants and industries use coal as solid fuel. Burning coal produces fly ash, bottom ash, poisonous gas and unused coal residue. The coal waste is commonly found in mining operations, abandoned mining areas, laboratories and power plants. This problem could be solved by producing bio-briquette using the coal waste. In this study, laboratory scale pyrolysis and non pyrolysis methods were used to produce bio-briquette using the coal waste with measurement of proximate analysis and burning rate. Pyrolysis was carried out at constant temperature of 400 oC for 2 hours. The total weight of briquette sample as much as 99.87 g was burnt at 400 oC with sufficient air space in the furnace. The waste coal was mixed with biomass bagasse and sugar cane stems before the briquetting process. The composition of the briquette material was 50 g of coal waste, 30 g of sugar cane biomass, and 10 g of bagasse. To form the briquette, tapioca was used as adhesive in addition to 5 g of clay with 50 mesh of size and application of 50 kg/cm2 pressure. The result of proximate analysis and combustion of the non-pyrolysis bio-briquette showed that non-pyrolysis bio-briquette contained 4.17 % of moisture content, 18.39% of fly ash, 25.56% of ash content, 5157.87 cal/g of calorific value. The mass of of pyrolysis bio-briquette (50 g) decreased to 30 g during 30 minutes, the compulsion reached maximum speed on 1.93 g/s and the smoke disappeared on the 24th minute The pyrolysis process on coal waste decreased the smoke and the addition of biomass increased the calorific value of bio-coal briquette.ABSTRAKIndonesia memiliki sumber energi fosil yang sangat besar seperti batu bara. Hampir seluruh pembangkit listrik dan industri di Indonesia menggunakan bahan baku batu bara. Batu bara memiliki limbah berupa flying ash, bottom ash, gas beracun dan sisa batu bara yang tidak terpakai. Limbah batu bara tidak terpakai banyak terdapat di pertambangan yang masih beroperasi, sisa lahan pertambangan, laboratorium, pembangkit listrik, sehingga perlu penanganan yang tepat seperti pembuatan briket bio-batu bara. Pada pembuatan briket bio-batu bara ini, batu bara diproses menggunakan metode pirolisis dan tanpa pirolisis dengan uji skala laboratorium seperti uji proksimat dan laju pembakaran. Proses pirolisis menggunakan suhu 400 oC selama 2 jam dan karbonisasi biomassa tanpa menggunakan parameter suhu dan waktu. Berat sampel briket sebesar 99,87 g dibakar pada suhu pembakaran 400 oC dengan menggunakan udara ruang didalam furnace. Sebelum proses pembriketan, batu bara yang telah mengalami proses pirolisis dan tanpa pirolisis dicampur dengan limbah biomassa ampas dan batang tebu. Variabel penelitian menggunakan 50 g limbah batu bara, 30 g biomassa batang tebu dan 10 g ampas tebu. Briket bio-batu bara menggunakan perekat tepung kanji dan tanah liat dengan berat masing–masing 5 g. Sedangkan untuk tingkat kelembutan setiap bahan briket adalah 50 mesh dengan kuat tekan 50 kg/cm2. Hasil analisis proksimat briket bio-batu bara PP (50 g) mengandung kadar air sebesar 4,17%, zat terbang 18,39%, kadar abu 25,56%, nilai kalori sebesar 5157,87 kal/g. Briket bio-batu bara PP (50 g) mengalami penurunan massa sebanyak 30 g selama 30 menit, laju pembakaran mencapai kecepatan maksimum 1,93 g/s dan asap hilang pada menit ke-24. Batu bara dengan proses pirolisis dapat menurunkan asap dan penambahan biomassa dapat menaikkan nilai kalori briket bio-batu bara.
Analisis Pembangunan Pembangkit Listrik Tenaga Sampah (Pltsa) Kota Pekanbaru Ditinjau Dari Aspek Ekonomi Teknik Sepriona, Tatik; Nurhalim, Nurhalim
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Renewable energy is a natural energy source that can be directly utilized freely. In addition, the availability of renewable energy is unlimited and can be used continuously. One of them is by utilizing waste that can potentially be converted into electricity. So far in the Pekanbaru the waste has not been sterilized. It is only founded in the garbage dump of Muara Fajar. Pekanbaru has an area of 632.26 km², with a population reaching 1,064,566 people, every day being able to produce trash up to1,112 tons (density 0.3). By looking at the situation, it is necessary to do a proper analysis to determine the feasibility of building a power plant garbage power. The method used for calculating NPV and PP is the least cost method. From the results obtained the amount of electrical energy produced in a year 112592260.99 kWh / year, while the NPV value = Rp 80,061,249,724, and PP value 8 years. Lastly, the results of analysis given the construction of PLTSa in Pekanbaru fulfill the eligibility criteria to be based.. Keywords: energy, garbage dump, NPV, PLTSa, waste