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INDONESIA
Jurnal SImetri Rekayasa
Published by Universitas Harapan Medan
ISSN : 2715890X     EISSN : 27165035     DOI : 10.35447
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Dalam Jurnal SIMETRI REKAYASA Membahas mengenai scope: Teknik Sipil Teknik Mesin Teknik Elektro Teknik Industri
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 83 Documents
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REDUKSI HARMONISA PADA UNINTERRUPTIBLE POWER SUPPLY (UPS) DENGAN SINGLE TUNED PASSIVE FILTER Agus Almi
Jurnal Simetri Rekayasa Vol 1 No 1 (2019): Edisi Mei
Publisher : Universitas Harapan Medan

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Abstract

Using non-linear load in UPS (Uninterruptible Power Supply) can cause harmonic distortion which will eventually have the effect on power quality. The research was designed as a single-turned passive filter to cope with harmonic distortion in UPS. In this phase, THDv, THDi, and IHDi were measured in UPS. MATLAB/Simulink was used for simulation of filter testing. After Single Turned Passive Filter was installed, the third order of harmonic current decreased from 47.69% to 7.08% or reduced 40.61%
Analisa Karakteristik Penggaturan Kerja Operator Terhadap Pencapaian Keluaran Produksi edy edy
Jurnal Simetri Rekayasa Vol 1 No 1 (2019): Edisi Mei
Publisher : Universitas Harapan Medan

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Abstract

This research is to find out the characteristics of one of the companies taken in one journal that shows the 100% display check output data in a period of 1 week, summary output from 5 operators in 1 week and summary of output / day and number of types of output checked / days. Where the results obtained have differences in suitability of the operators doing work in the week. So by analyzing the 100% display checking process, we will find the causes of output variations and possible ways to minimize the output variation. By reducing the output variation, it is expected that the output of 100% checking will be more stable and increase compared to the previous output. The end result is customer satisfaction with the fulfillment of customer demand for goods ordering and reduction in the company's operational costs related to the reduction in the number of employees
PENGARUH VARIASI KUAT ARUS LAS LISTRIK PADA PENGELASAN BAJA C45 DENGAN SUDUT KAMPU V GANDA TERHADAP UJI TARIK DAN UJI IMPAK Tirto tirto
Jurnal Simetri Rekayasa Vol 1 No 1 (2019): Edisi Mei
Publisher : Universitas Harapan Medan

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The development of the era and technology in the field of advanced construction can not be separated from the welding because welding has an important role in the engineering and reparation of metal. In terms of welding welding power is influenced by arc voltage, current, welding speed, magnitude of penetration and electrical polarity. various types of appliances that can be used, generally the most widely used electric welding in the usage.penggunaan variations of electric current can be easily set according to the type of welding materials and welding methods on welding machine listrikk.baja which is in use also various types, times this I will gun steel c45, karna on steel machining world c45 many in use on the engine shaft
ANALISIS KARAKTERISTIK HASIL PROSES PENGECORAN BESI COR KELABU DENGAN VARIASI DESIGN MODEL INTI COR Sandy F Candra
Jurnal Simetri Rekayasa Vol 1 No 1 (2019): Edisi Mei
Publisher : Universitas Harapan Medan

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This study is a study that mengililasi casting process gray cast iron. From the characteristics obtained data table attached. Based on the results of research that the microstructure of the specimens in this study is the result of casting gray cast iron which has a strong and sturdy perlite metric. Graphite flakes in specimens I (3% Bentonite) were harder than specimens II (5% Bentonite). Ferrite in specimen I was more than ferrite in specimen II. Specimen I has a rather rough pearlite structure, while specimen II has fine pearlite. The hardness of gray cast iron possessed by 66.5 HRA II specimens was higher than that of gray cast iron possessed by specimen I which was 55.8 HRA. The tensile strength in specimens II was 278.68 N / mm2 higher than the tensile strength of specimens I was 222.92 N / mm2
PENGARUH VARIASI KUAT ARUS LAS LISTRIK PADA PENGELASAN BAJA C45 DENGAN SUDUT KAMPU V GANDA TERHADAP UJI TARIK DAN UJI IMPAK Taufik Sutoyo
Jurnal Simetri Rekayasa Vol 1 No 1 (2019): Edisi Mei
Publisher : Universitas Harapan Medan

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The research of Carbide Cut Chisel concludes that every time there is a change in the execution of the work, indirectly changes in cutting speed, heat energy in metal cutting, heat due to chip chisel friction, heat arising from the scissors force. although done with a fixed force from this result data is obtained for processing time 2, 4 and 8 hours cutting speed (Vc) = 2.66 m / s, 3.16 m / s, 3.83 m / s with cutting power ( Pc) = 14.77 Hp and Electro Motor Power (Pg) = 18.7 Hp. For forces that occur in the turning process obtained Fc = 350 kg, Ft = 180.3 kg, Fs = 280.9 kg, Fns = 350 kg, Fv = 397 kg, Ff = 218 kg, Fn = 332 kg. The results obtained for Pm are 102 kal / s, 169kal / s for Pf is 2172 kal / s, 2580 kal / s, 3127 kal / s for Ps is 128 kal / s, 152 kal / s 184 cal / s. Temperature Zone 1 and Temperature Zone 2 are for Өm are 76.940C, 76.93 0C, 73.28 0C and Өf are 4.82 0 C with a time of 2.4 and 8 hours. Next for mtm = 584 0C, 583 0 C, 582 0C. For ∆ts are: 8.6 0C, 8.5 0C, 8.4 0C. For ∆to = Room temperature is taken 28 0C. For Maximun Temperature ∆. max = 620.6 0C, 619.50C, 618.4 0C.
SISTEM KENDALI OVER-HEAD CRANE DENGAN WIRELESS CONTROL MENGGUNAKAN SMARTPHONE ANDROID DAN TAMPILAN LCD BERBASIS ARDUINO Bayu Sukma Sejati; Izza Anshory
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Abstract

Overhead cranes are lifting tools used by almost all industries, ports, warehouses, workshops, and others. Generally, the overhead crane control system is less effective and efficient because the operator still follows where the crane is moving. In this case, problems often occur because the pendant switch that functions as a controller still uses the cable as a link to the overhead crane panel. Various problems that occur between cables often break up because of being hit by a load lifted by a hoist, operators who have difficulty adjusting the safe distance because they are limited by the length of the cable pendant switch. The purpose of this thesis is to create a control system that is expected to be able to control the overhead crane effectively and efficiently without using a cable as a connector but using an Android smartphone. Control with an Android smartphone using bluetooth serial communication with 16x2 LCD display and Arduino Uno R3 microcontroller. Based on the results of testing on this control system, control of the device can be controlled at a maximum distance of ± 12 meters without bulkhead and a distance of ± 10 meters with a bulkhead. The results of the test prove that the control system can function optimally and the remote application can be installed on the Android 4.0 Mininal Android smartphone (Jelly Bean). Therefore the use of cable can be replaced with a wireless connection system (Bluetooth) to reduce the occurrence of friction with the cable and so that the operator can maintain a safe distance with the load to be moved because it is not limited by the cable length
Otomasi Rolling Door Menggunakan Android Dan QR Code Angga Putra; Dwi Hadidjaja Rasjid Saputra
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Abstract

Rolling Door is a door to protect items inside the room. In general, the locking system is still conventional by utilizing the key as a security system. The problem faced is the easy duplication of rolling door keys at this time. It is risky for others to open without the owner's knowledge, this design is done so that rolling doors have a more conventional level of security. The author tries to make a rolling door controller using the Android smartphone application and Arduino microcontroller via Bluetooth, in order to make it easier to use and replace the manual function by applying Bluetooth on an Android phone connected to the Bluetooth module on Arduino then the system is controlled via an Android handphone to send data to Arduino to be processed to control the condition of the motor, so that the rolling door can be opened and closed automatically using a solenoid door lock and QR Code as a lock.
ANALISIS STUDI KELAYAKAN USAHA PENDIRIAN INDUSTRI RUMAHAN (STUDI KASUS DI UKM MIE PANGSIT XYZ MEDAN) Ivo Andika Hasugian; Fernando Fernando; Supriadi Supriadi
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Abstract

Penelitian ini bertujuan untuk mengetahui tingkat kelayakan investasi dalam pendirian UKM Mie Pangsit XYZ. Pengamatan dilakukan dengan teknik pengumpulan data berupa observasi dan wawancara. Metode yang digunakan yaitu aspek finansial dengan perhitungan kelayakan investasi berupa Payback Period (PP), Net Present Value (NPV), Internal Rate of Return (IRR) dan Profitability Index (PI). Analisis pasar dan pemasaran menunjukkan bahwa UKM pembuatan mie pangsit cukup layak dilanjutkan, dilihat dari peningkatan jumlah permintaan setiap tahun dan keuntungan yang melebihi nilai investasi. Pada Analisis dengan aspek finansial didapatkan hasil Payback Period (PP) yaitu 9 bulan 11 hari, Net Present Value (NPV) sebesar 106.221.984, Internal Rate of Return (IRR) sebesar 29,90%, dan Profitability Index (PI) sebesar 1,29.
PENGARUH TEKANAN DAN TEMPERATUR TERHADAP LAJU MASSA PADA SIKLUS RANKIN ORGANIK SEDERHANA Achmad Husein Siregar; Andi Pintoro
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Abstract

Electricity is a major need for people, especially in Indonesia. The need for electricity is increasing every year. In 2019 PLN estimates that electricity consumption will grow by 6%. To meet the demand for electricity supply and in particular to provide renewable and environmentally friendly electricity, a breakthrough is needed in the search for new and renewable sources of electricity. One of them is the potential source of electrical energy from geothermal heat sources, especially those of low quality. In this research an experimental study was carried out on a laboratory-scale power generation system with the principle of a simple Organic Rankine Cycle with a low-quality geothermal heat source. The generator system is designed, then built and finally tested using R134a as a working fluid. The main components of this system are the vane pump (to increase working fluid pressure), evaporator (to absorb heat from heat sources), expanders / turbines (to convert heat energy into kinetic energy) and condenser (to convert the phase of working fluid into saturated liquid). In this study, we will look for the influence of variations in pressure and temperature on the mass flow rate of the working fluid which is one of the factors that determine the performance of the observed system. In this experiment, it was concluded that by maintaining a constant temperature and increasing evaporation pressure, a mass flow rate would decrease. Constant temperature is carried out at 80 oC, 85 oC, 90 oC, 95 oC and 100 oC. A decrease in the mass flow rate when the pressure is raised at a constant temperature will result in better system performance.
ANALISA SIFAT MEKANIS MATERIAL KOMPOSIT POLIMER BUSA DENGAN BLOWING AGENT SODIUM BICARBONAT DAN DIPERKUAT SERAT TANDAN KOSONG KELAPA SAWIT Ade Irwan
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Abstract

Empty palm fruit bunch fiber reinforced polymeric foam has been developing as alternative engineering material. This material uses unsaturated polyester resin (UPR) as its matrics, and treatmented empty palm fruit bunch fiber as its reinforcement element. Environmental friendly blowing agent has been used to get foamy structure in this material. This material tested to get properties of density, tension strength, static compression strength, and foams distribution. The result of this research is that A composition has the highest density for 665 kg/m3, with tension strength 0.05 MPa, compression strength 6.802 MPa and elastic modulus 37.859 Mpa. Eventhough additon of fiber could decrease mass of material, but in other side it could decrease the strenght of material too.

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