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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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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 PELAPISAN NIKEL (Ni) TERHADAP LAJU KOROSI PADA IMPELLER POMPA Syafrul Hadi
Jurnal Momentum ISSN 1693-752X Vol 17, No 1 (2015): Volume 17 No 1 Tahun 2015
Publisher : ITP Press

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Pelapisan Ni adalah upaya pengendalian korosi logam yang dilapis terhadap suatu lingkungan korosif. Inovasi pelapisan Ni terhadap impeller pompa yang digunakan pada lingkungan air laut diharapkan dapat meningkatkan ketahanan korosinya. Ketahanan korosi impeller dilingkungan air laut ditandai oleh laju korosi yang rendah. Pelapisan nikel dengan teknik elektroplating menggunakan arus 3,5 A dan variasi waktu 2, 4, 6 dan 8 menit. Hasil lapisan dan laju korosi diukur dengan metoda pertambahan berat. Waktu pelapisan 2 menit, pertambahan beratnya 0.2 gram, 4 menit, pertambahan beratnya 0.4 gram, 6 menit pertambahan beratnya 0.8 gram dan 8 menit terjadi pertambahan beratnya 1.1 gram, Pengujian laju korosi impeller pompa selama 160 jam dilingkungan air laut dengan teknik sirkulasi terbuka. Hasil pengujian laju korosi menunjukan bahwa impeller yang telah dilapisi Nikel (Ni) dengan waktu pelapisan 8 menit adalah terrendah yaitu sebesar 0.002 mpy, dan laju korosi terhadap impeller yang tidak dilapisi sebesar 0,182 mpy

PENGEMBANGAN METODE PENGONTROLAN TEMPERATUR ALIRAN UDARA DENGAN MENGGUNAKAN ANALOG VOLTAGE-CONTROLLED PHASE-ANGLE-FIRED POWER INTERFACE Asmara Yanto; Syafrul Hadi
Jurnal Teknik Elektro Vol 2, No 3 (2013): Jurnal Teknik Elektro
Publisher : Situs resmi ITP Press

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Alat-alat pengontrol temperatur aliran udara pada alat pengering udara buatan untuk proses pengeringan hasil-hasil pertanian, perkebunan, dan perikanan hanya dapar digunakan pada satu saluran udara. Permasalahan ini dapat dipecahkan dengan melakukan suatu inovasi alat pengontrol temperatur aliran udara. Pada makalah ini dikembangkan suatu metode dan membuat sebuah alat pengontrol temperatur aliran udara dengan menggunakan analog voltage-controlled phase-angle-fired power interface method. Disini, pengontrolan temperatur aliran udara dikembangkan untuk mengontrol tiga macam temperatur aliran udara pada sistem saluran udara. Pada setiap saluran udara ditempatkan pemanas dan sensor temperatur. Diharapkan, metode dan produk dari alat pengontrol ini dapat digunakan pada alat pengering buatan untuk proses pengeringan hasil-hasil pertanian, perkebunan, dan perikanan.

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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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.

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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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.

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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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.

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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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.

Performance analyses on fluidized bed dryer integrated biomass furnace with and without air preheater for paddy drying M yahya; Hendriwan Fahmi; Syafrul Hadi; Edison Edison
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 3: September 2019
Publisher : Institute of Advanced Engineering and Science

The performance of a fluidized bed dryer integrated biomass furnace with air preheater (FBD with APH) and a fluidized bed dryer integrated biomass furnace without air preheater (FBD without APH) for drying of paddy have been evaluated. The FBD with APH and FBD without APH decreased the moisture of paddy from 24% (wet basis) to 14% (wet basis) within 43 and 47 minutes with average temperatures and relative humidities of 59.58 oC and 59.14oC, and 18.81% and 18.68%, respectively. The drying rate of paddy varied in the range of 0.11 kg/min-0.32 kg/min and 0.10 kg/min- 0.30 kg/min for FBD with APH and FBD without APH, with average values of 0.18kg/min and 0.17kg/min, respectively. The minimum, maximum, and average value speciﬁc moisture evaporation rate (SMER) was 0.20 kg/kWh, 0.57 kg/kWh, and 0.31 kg/kWh, respectively for FBD with APH, as well as 0.149 kg/kWh, 0.448 kg/kWh, and 0.252 kg/kWh, respectively, for FBD without APH. The specific energy consumption (SEC), the specific electrical energy consumption (SEEC), and the specific thermal energy consumption (STEC) were varied from 1.749 kWh/kg to 5.076 kWh/kg, 0.090 kWh/kg to 2.872 kWh/kg, and 0.760 kWh/kg to 2.204 kWh/kg, with average values of 3.528 kWh/kg, 1.96 kWh/kg, and 1.532 kWh/kg, respectively for FBD with APH, as well as from 2.234 kWh/kg to 6.702 kWh/kg, 1.056 kWh/kg to 3.167 kWh/kg, and 1.179 kWh/kg to 3.536 kWh/kg, with average values of 4.391 kWh/kg, 2.075 kWh/kg, and 2.316 kWh/kg, respectively, for FBD without APH. The thermal efﬁciencies of the FBD with APH and FBD without APH were varied between 12.4% and 37.93%, and 9.78% and 29.82%, resvectively, with average values of 20.78% and 16.61%. The thermal efficiency of FBD with APH was higher compared to FBD without APH.

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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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.

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