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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Teknik Elektro Jurnal Momentum Jurnal Teknik Mesin Jurnal Teknik Mesin Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Syafrul Hadi
Institut Teknologi Padang
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Journal : Jurnal%20Teknik%20Mesin

 1 
Influence of Chemical Composition and Chrome Plating Duration on Thickness and Hardness of the Surface Coating on the Brass Plate Syafrul Hadi
Jurnal Teknik Mesin (JTM) Vol 6, No 1 (2016)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

In the metalworking technology, the electroplating process is categorized as a process of late. Electroplating can be interpreted as a metal coating process by using an electric current, wherein the anode used is chromium, but it also is the chemical composition that is acidic chromium, sulfuric acid, sulfuric and hydrochloric acid, are used to move the particles of the metal coating to the material to be coated , The objective of the research is to see the influence of the chemical composition of the solution to the thickness and hardness of the coating, the effect of long time coating thickness and hardness of the surface coating on the brass plate. Benefits of the research carried out to improve the quality of products in terms of physical, increase corrosion resistance, and increase violence. In this study specimens used rectangular brass plate with a size of 60 mm x 40 mm x 1.5 mm. Chromium electroplating process using a solution by varying the chemical composition of the solution and long plating time 20 minutes, 25 minutes and 30 minutes. Thickness testing conducted by means of Optical Microscope microstructure whereas hardness testing conducted by Micro Hardness Tester with a load of 9807 N. The results of this study showed that the thickness of the layer of the highest at 30 minutes with the chemical composition of the acid solution of chromium (CrO3) 200 grams / liter, sour sulphate (H2SO4) 30 g / liter of 32.85 μm while the highest hardness layer at the time of 25 minutes with the chemical composition of the acid solution of chromium (CrO3) 200 grams / liter, sulfuric acid (H2SO4) 30 g / liter of 112.67 VHN.
Effect of the Environmentally Friendly Composite Materials on Physical and Thermal Properties of the Natural Composite Syafrul Hadi; Mastariyanto Perdana
Jurnal Teknik Mesin (JTM) Vol 8, No 1 (2018)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

One of the most widely used and applied technics materials today is a composite material based on nature. Natural composites are lightweight and relatively strong and environmentally friendly, so composites based on synthetic fibers are reduced in use. This study uses constituent materials derived from shells and bunches of palm oil plant crops that function as reinforcement. Shells and fibers from empty bunch of oil palm plants are made in the form of powder. Matrix used in this research was polyester resin and epoxy resin. The volume fraction between the reinforcement and the matrix is 50:50. The fabrication process of this environmentally friendly composite is compression molding with a pressure load of 30 kg/cm2. This study aims to determine the effect of the type of composite materials on physical and thermal properties of the natural composite. The results show that natural composites are high density composites. The highest density of palm shell/polyester composite is 1,223 g/cm3 and the lowest density of oil palm empty bunch/epoxy composite is 1,021 g/cm3. The highest thermal conductivity of oil palm shell/polyester composite is 0,28 W/m.K. Thermal conductivity composite value is more influenced by binder/matrix of composites.
PENGARUH MODEL KEBOCORAN DINDING PIPA SAMPING TERHADAP FLUKTUASI TEKANAN ALIRAN DUA FASE AIR-UDARA PADA PIPA HORISONTAL Syafrul Hadi
Jurnal Teknik Mesin (JTM) Vol 1, No 1 (2011)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

Aliran dua fase pada pipa akan memberikan pola aliran yang berbeda dan karakteristik slip antar fase. Pola aliran dapat diidentifikasi dengan fluktuasi tekanan, deteksi kebocoran harus menentukan karakteristik (pola aliran) sebelum suatu titik kebocoran dapat dikenali. Pendeteksian kebocoran aliran dua fase adalah lebih rumit dengan melibatkan distribusi fase di dalam pipa dan lokasi kebocoran pada sekeliling pipa. Bentuk kebocoran yang diteliti terjadi pada pipa dengan berdiameter 7 mm dan berposisi pada samping dinding pipa. Pada penelitian ini digunakan dua buah pressure differential tranducer yang dipasang di sisi upstream (sebelum kebocoran) dan sisi downstream (setelah kebocoran) dengan jarak 400 mm. Sinyal fluktuasi penurunan tekanan direkam dengan menggunakan akuisisi data (data acquisition) dan diolah dengan menggunakan Digital Signal Prossesing (DSP) dan Fast Fourier Transform (FFT) untuk menghasilkan Power Spectrum Density (PSD). Hasil penelitian ini memperlihatkan perubahan/perbedaan yang jelas pada pola sinyal fluktuasi penurunan tekanan di sisi upstream dan sisi downstream, bila terjadi kebocoran pada bagian samping pipa untuk aliran plug, aliran slug.
PENGARUH LINGKUNGAN MINYAK MENTAH TERHADAP LAJU KOROSI PADA PIPA BAJA KARBON DAN PIPA GALVANIS Syafrul Hadi; Jumarlis Jumarlis
Jurnal Teknik Mesin (JTM) Vol 3, No 2 (2013)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

In oil industry and gas, pipeline constituting main component that is utilized as medium of distribution and oil transmission, gas and good water at continent (onshore) and also at offshore (offshore). Rock oil (Crude oil ) a new one taken from by earth belly consisting of 3 main compositions which is oil,gas and water. Meaty alone rock oil of various chemical element kinds, generally mixed organic( hydrocarbon), oxygen, sulphur and nitrogen, water, salt, H2 S and mixed another organic. About problem which often been faced by pipeline on offshore (offshore) and land (onshore) in industry oil and gas is its happening corrosion. To the effect this research is subject to be know rock oil environment influence to corrosion fast carbon steel pipe and galvanic, well is seen from visual's watch and also of outgrows it happening corrosion runaway speed. pengorosian's process carbon steel pipe and galvanic pipe is done in rock oil medium with hall temperature 29 38O C. Of corrosion watch result and corrosion fast both of sample, visually that soaking time afters specimen 36th day until 47 th day, specimen experiences surface corrosion that merata. Its happening is this discoloration as a corrosion product form merata (karat). There is product even the other corrosion be been formed it sumuran's corrosion by marks sense little fleck. Meanwhile sample corrosion runaway speed greater galvanic pipe fast corrosion namely 0,2996 mpy of on carbon steel pipe sample 0.1242 mpy. It because of marks sense proprietary chemical element rock oils, its main h2 N, H2 O, CO2 , O2 one that so aggressive, where is element h2 N, H2 O, CO2, O2 this if contact with Fe will hasten its happening corrosion.
LAJU PENGERINGAN KAPULAGA MENGGUNAKAN ALAT PENGERING EFEK RUMAH KACA DENGAN BANTUAN TUNGKU BIOMASSA Syafrul Hadi
Jurnal Teknik Mesin (JTM) Vol 5, No 1 (2015)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

Pengolahan Kapulaga masih dilakukan secara tradisional. Pengeringan secara tradisional memiliki beberapa kelemahan dan membutuhkan lahan terbuka luas dan terjadinya kontaminasi dengan debu, kotoran sehingga kapulaga kurang higienis dan bermutu rendah. Untuk mengatasi masalah tersebut, maka dirancanglah sebuah Alat Pengering Efek Rumah Kaca, dengan bantuan Energi Biomassa (Pengering Hybrid). Tujuan dari penelitian ini adalah untuk mengetahui laju pengeringan Kapulaga dengan menggunakan alat pengering Hybrid. Alat pengering dengan memanfaatkan energi Matahari, Energi Biomassa dari pembakaran sekam padi. Pada penelitian ini, Kapulaga yang akan dikeringkan sebanyak 26 kg dengan kadar air awal 78%. Hasil penelitian diperoleh Laju pengeringan Kapulaga dengan menggunakan alat pengering Hybrid ini adalah sebesar 0.00062 kg/s. Proses pengeringan menggunakan alat pengering Efek Rumah Kaca dengan bantuan Tungku Biomassa ini mampu mengeringkan Kapulaga hingga kadar air 9.88% selama 12 jam (dua hari) pengeringan.
Improved Performance of the Vapor Compression Cooling System Using A Combination of Condensers-Evaporative Cooling Arfidian Rachman; Sulaeman Sulaeman; Syafrul Hadi
Jurnal Teknik Mesin (JTM) Vol 8, No 1 (2018)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

Energy use is a major problem in the vapor compression air cooling system, especially in areas with very hot weather conditions. In hot weather conditions, the performance of the system has decreased dramatically and electricity consumption has increased significantly. Combined Condensor with evaporative cooling will increase the heat removal process by using an evaporative cooling effect that will increase the efficiency of energy use. This paper presents the study of the use of evaporative cooling and condenser. This paper mainly calculated energy consumption in steam compression cooling systems and related problems. From the results of this study, the use of condensers with evaporative cooling, power consumption can be reduced to 46% and performance coefficient (COP) can be increased by about 12%, with 1,2 kW cooling capacity.
Co-Authors Arfidian Rachman Asmara Yanto Edison Edison Fajar Marda Kapur Hendriwan Fahmi Jumarlis Jumarlis Jumarlis M yahya Mastariyanto Perdana Sulaeman Sulaeman