Raspberry-Based Control System for the Future House

Abstract: According to aired TV announcements, any accidents are caused by the improper installation of electrical and control devices. Therefore, a person highly skilled with a certificate of expertise specifically in installing electrical and control systems is needed to carry out the installation to avoid the danger of short circuits. Therefore, this research aims to develop software capable of controlling all electrical devices of a house based on a raspberry-based control system with the tools executed by a smartphone to ensure adequate securities. The results showed that the raspberry-based electrical control system functions properly, both on the security system (MCB) and various controlled loads. This was further determined by carrying out research trials using smartphones and a manual switch button on the boarding house, which also showed that the application and interface of the raspberry-based electrical control system function properly, as evidenced by the results of the full system trial, using local IP, internet networks, and smartphones. Keywords: control tools; electric devices; interface; Raspberry Pi; smartphon

ANALISIS DISTRIBUSI ENERGI PADA PEMBAKARAN BAHAN BAKAR GASOLINE DAN CAMPURAN GASOLINE - BIOETHANOL (E50)

PeneIitian ini berbasis pada penerapan hukum termodinamika pertama yang bertujuan untuk mengukur distribusi energi yang dihasilkan dari pembakaran bahan bakar gasoline (E0) dan campuran gasoline – bioethanol (E50) pada mesin spark ignition. Pengujian dilakukan pada parameter pembakaran standar mesin yaitu rasio kompressi 11:1 dan pengapian 12 BTDC. Sementara itu, variasi volume injeksi dalam rentang 100% - 200% (penambahan 25%) pada bahan bakar E50 dilakukan untuk mengetahui pengaruh variasi volume injeksi bahan bakar E50 terhadap laju energi pada daya poros, gas buang dan kerugian energi. Hasil penelitian menunjukkan bahwa energi bahan bakar campuran gasoline dan bioethanol (E50) lebih tinggi dari pada energi bahan bakar, kecuali jika volume injeksi E50 sama dengan E0. Akan tetapi energi bahan bakar E0 dengan nilai rata-rata 16,62 kW realtif akan sama dengan E50 dengan nilai rata-rata 17,45 kW, jika bahan bakar E50 diinjeksikan pada volume 125% atau 0,25 kali lebih besar dari injeksi bahan bakar E0. Hasil penelitian ini juga menunjukkan bahwa semakin naik injeksi bahan bakar E50, maka energi bahan bakar akan semakin meningkat rata-rata sebesar 2,7 kW setiap kenikan volume injeksi 25%. Energi bahan bakar terkecil dari E50 adalah rata-rata 15,18 kW dan terbesar adalah 25,84 kW yang masing-masing diperoleh pada volume injeksi 100% dan 200%. Induksi bahan bakar E50 yang dianggap cocok untuk diaplikasikan pada mesin bensin adalah pada volume injeksi 125%. Pada kondisi tersebut distribusi energi pada daya dan gas buang untuk E50 pada durasi injeksi 125% masing-masing adalah 6,59 kW dan 4,70 kW, sedangkan untuk E0 masing-masing adalah: 6,35 kW dan 6,19 kW dan sisanya diidentifikasi sebagai kerugian energi ( ) Qloss Kata Kunci: Energi, Campuran Bahan Bakar, Gasoline, Bioethanol, Termodinamika, E50

Analisis Kerusakan Mesin Oven Lincoln 1457 dengan Menggunakan Metode Failure Mode and Effect Analyst (FMEA) di PT. XYZ

Saat ini Oven Lincoln 1457 milik PT. XYZ banyak di gunakan di beberapa gerai FastFood, salah satunya di Pizza Hut, akan tetapi oven ini belum mempunyai laporan tentang hasil kerusakan nya. Dari beberapa tahun ini kita tidak mengetahui bagian-bagian dari mesin Oven ini yang sering rusak dan cara penanganannya sehingga meminimalisir kerusakan. Tujuan dari penelitian ini adalah (1). Mengetahui jenis-jenis kerusakan pada Mesin Oven Lincoln 1457. (2) Mengetahui bagian – bagian yang paling sering rusak pada Mesin Oven Lincoln 1457. (3) Menganalisis Kerusakan pada Mesin Oven Lincoln 1457 menggunakan metode FMEA. Metode Penelitian ini menggunakan penelitian wawancara dan perpustakaan dengan dengan pendekatan FMEA. Adapun jenis – jenis kerusakan pada mesin oven Lincoln 1457 adalah No Box Control Cooling, Low flame is on, but no main flame, Low flame is on, but no main flame, Oven Will Not heat, Oven Will Not heat, Conveyor Will Not Run/ Kovevyor tidak akan berjalan, Oven Will Not heat, Conveyor Will Not Run/ Kovevyor tidak akan berjalan, Oven Will Not heat, Switch ON/OFF, No Control Box Cooling, Oven Will Not heat. Hasil dari penelitian ini adalah sebanyak 12 varian kerusakan pada Mesin Oven Lincoln 1457 dengan tingkat frekuensi yang berbeda-beda. Jenis kerusakan yang pertama “switch On/Off” dengan nilai RPN terbesar yaitu 125 dan yang terendah adalah “Control Transformer” dengan nilai RPN 12. Nilai total komulatif terbesar didapat sebesar 503 dan nilai total komulatif terkecil didapat sebesar 125. Pada persentase keseluruhan didapatkan angka tertinggi yaitu dengan persentase 24,90% dan yang terkecil yaitu sebesar 2,40% sedangkan pada persentase komulatid didapat angka tertinggi yaitu sebesar 100% dan nilai persentase terkecil sebesar 24,90%. Kata Kunci : FMEA, Kerusakan, Mesin Ove

THE DEVELOPMENT OF COMBUSTION STRATEGY IN IMPROVING THE PERFORMANCES OF SI-PFI ENGINE USING E50 OF GASOLINE-BIOETHANOL FUEL BLEND

This research aims to improve the combustion performance of gasoline-bioethanol fuel blended in the ratio of 50:50 (E50) on the spark-ignition engine by employing a new combustion strategy. The Box Behnken Design of Response Surface Methodology and NonLinear Programming was employed to optimize the performance of the engine and create some engine parameters. The performance of the engine consists of power, torque, thermal efficiency, fuel consumption, and the emission of CO and HC, while the engine and combustion parameters are compression ratio, ignition timing, and engine speed. A new combustion strategy will be applied in this study with a tiered mapping process for each engine parameter based on the MBT. The brake torque increased by 13.5 % while HC and CO emissions decreased by 15 % and 71 % respectively when the combustion strategy applied if compared o the pure gasoline in engine standard condition. Furthermore, the BSFC increased by 33 % while BTE decreased by 15 % towards the gasoline fuel. The nonlinear programming applied in this study intended to figure out the best combination of the engine parameters in obtaining optimum engine performances. In the RSM analysis, the codes –1, 0, 1 represented 12, 12.5, and 13 of compression ratio, 16, 20, and 24 BTDC of ignition timing and 2000, 5000, and 8000 rpm of engine speed. Therefore, 20 BTDC of ignition timing and 13:1 of compression ratio is the optimum engine Spark ignition engine, gasoline-bioethanol blend, Response Surface Methodology, combustion strategy, compression rati

Studi experimental penambahan minyak cengkeh pada bahan bakar pertalite terhadap kinerja dan emisi gas buang mesin tipe TV-1

This research is a laboratory experimental research using a TV-1 type testing engine. This study aims to determine the performance and exhaust emissions of a four-stroke motorcycle on pertalite fuel and fuel with a mixture of clove oil. The composition of the clove oil mixture used in the study. this is as much as 5 %, 10 %, 15 %, 20 % and 25 % into pertalite fuel in units of milliliters (ml). Data collection uses observation techniques using observation tables to record the research results obtained. Data analysis techniques used descriptive analysis in the form of tables and graphs to present the research results. As for the research results from the analysis of engine performance, it was found that there was an increase in engine performance at low rpm with the addition of clove oil to pertalite fuel while for high rpm the greatest power was obtained on pure pertalite fuel. But for fuel consumption, the lowest consumption was found in the composition of 5% clove oil mixture. Whereas for exhaust emissions, the addition of clove oil to pertalite fuel for CO gas emissions can reduce emissions, namely the 10 % clove oil mixture. For HC gas emissions, namely in a mixture of 5 % and 10 % clove oil. As for CO2 emissions, it can be seen that the higher the composition of the clove oil mixture, the emissions also decrease and the highest CO2 emissions are in the 5 % clove oil mixture. Keywords: fuel; pertalite; clove oil; engine performance; exhaust emissions

A Strategy in Adjustment of Combustion Parameters of SI-PFI Engine with Pure Bioethanol Fuelled for a High Performance and Low Emission

Abstract: - Many researchers reported that the gasoline-Bioethanol blend have a big advantage to reduced hydrocarbon emissions. But, there was an inconsistence in increases of NOx emission when the blend contained by Bioethanol less than 50%. Usage of pure Bioethanol fuels (E100) is one of solution to minimized NOx emission. This work investigated the effect of E100 on performances and emissions of spark ignition engine with varied compression ratio and engine speed. This study is a continuation research with applying two methodology. Mapping the injection duration is a method that used at the first study. In mapping the injection duration, the ignition timing was fixed at 7o BTDC. But in this research, mapping the ignition timing strategy will complement of the first methodology. This paper evaluated advances of ignition timing from 10 to 22o BTDC with an increment of 4o BTDC. All the results will be compared with previous study, even when the engine runs with E0 fuels. Fortunately, there are a significance increase in performances was being achieved by this experiment as an improvement of previous process. The values describes about increases of the torque, power, BMEP and thermal efficiency as well as decreases of SFC and CO emission, meanwhile, HC emission tend to stable Key-words: - injection duration, ignition timing, compression ratio, advance, pure bioethanol, mappin

Analisis Beban Kerja Fisik Terhadap Kelelahan Kerja Dengan Menggunakan Metode Cardiovascular Load Di PT. XYZ

Kelelahan pekerja mengandung resiko dimana pekerja yang bekerja dalam keadaan lelah memiliki kecendrungan penurunan dalam kemampuan fisik serta psikis dapat berdampak pada tidak hati-hati dan tidak teliti dalam melakukan pekerjaan sehingga dapat menyebabkan kecelakaan kerja pada diri sendiri juga orang lain. Beban kerja fisik merupakan kegiatan pekerjaan yang memerlukan energi secara fisik pada manusia yang akan menjadi sumber tenaga. Kerja fisik disebut juga dengan “manual operation” dimana performansi kerja manusia sepenuhnya akan bergantung pada upaya manusia yang berperan sebagai sumber tenaga maupun pengendali kerja. Berdasarkan dari hasil pengklasifikasian dari metode Cardiovascular Load (CVL), hanya ada dua responden yang mengalami kelelahan yaitu responden yang bernama Eka dan Akram setiap minggunya memiliki pengklasifikasian yang berbeda. Dari pengklasifikasian %CVL pada minggu ke 3 pengambilan data denyut nadi responden didapatkan beban kerja yang berlebihan pada responden yang bernama Eka dan Akram tetapi data yang paling tinggi didapatkan oleh responden yang bernama Eka dengan data CVL sebesar 33,25% dan pada minggu ke 5dan 6 masih dengan responden yang sama yang mendapatkan pengklasifikasian %CVL ≤ 30%. Kata kunci : Kelelahan, pekerja, kecelakaan, responden

Influence of the Compression Ratio and Duration Injection on Performance and Emission of Sinjai Engine Type Flexible Fuel Engine 150 cc Fueled Bioethanol E70

In this study, the effects of using gasoline (E0) and gasoline-ethanol blends E70 on engine performance and exhaust emissions have been experimentally investigated. The investigation was conducted on a single-cylinder, four-stroke, spark ignition engine. The experiments were performed by varying the compression ratio and duration injection (100%, 125%, 150%, 175% and 200%) at a speed of 2000 up to 8000 rpm at full open throttle. The experimental results showed that blending gasoline with ethanol slightly increased the torque and decreased carbon monoxide (CO) and hydrocarbon (HC) emissions. It was also found that blending with ethanol allows increasing the compression ratio without knock occurrenc

Studi experimental penambahan minyak cengkeh pada bahan bakar pertalite terhadap kinerja dan emisi gas buang mesin tipe TV-1

This research is a laboratory experimental research using a TV-1 type testing machine. This study aims to determine the performance and exhaust emissions of a four-stroke motorcycle on pertalite fuel and fuel with a mixture of clove oil. The composition of the clove oil mixture used in the study. this is as much as 5%, 10%, 15%, 20% and 25% into pertalite fuel in units of milliliters (ml). Data collection uses observation techniques using observation tables to record the research results obtained. Data analysis techniques used descriptive analysis in the form of tables and graphs to present the research results. As for the research results from the analysis of engine performance, it was found that there was an increase in engine performance at low rpm with the addition of clove oil to pertalite fuel while for high rpm the greatest power was obtained on pure pertalite fuel. But for fuel consumption, the lowest consumption was found in the composition of 5% clove oil mixture. Whereas for exhaust emissions, the addition of clove oil to pertalite fuel for CO gas emissions can reduce emissions, namely the 10% clove oil mixture. For HC gas emissions, namely in a mixture of 5% and 10% clove oil. As for CO2 emissions, it can be seen that the higher the composition of the clove oil mixture, the emissions also decrease and the highest CO2 emissions are in the 5% clove oil mixture