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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Prosiding Semnastek Journal of Mechanical and Manufacture Seminar Nasional Teknologi dan Multidisiplin Ilmu
Rachmat, Asep
Program Studi Teknik Mesin, Fakultas Teknik, Universitas Majalengka
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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PUMP AS TURBINES (PATS) DESIGN OPTIMIZATION AS A RENEWABLE ENERGY SOURCE ALTERNATIVE Engkos Koswara; Asep Rachmat; Perly Sumirat
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 15, No 1 (2021): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.74-80

Abstract

One economical alternative to building a small-scale hydroelectric power plant is to use pumps as turbines, often referred to as PATs, which stands for Pump As Turbines. This research was conducted with an experimental method using a factorial experiment 22 After conducting research and data processing, Angle of Entry of Pump As Turbines and impeller tip angles Factors on turbines are equally influential to increase the speed of turning Pump As Turbines (PATs), but the variables the most influential in this study to increase the rotational speed of Pump As Turbines is the entry angle of PATs. Based on data processing to find the most influential variable using the Yates algorithm, if changing the PATs Entry Angle from 45° to 90° there will be an increase in Pump As Turbines rotational speed of 30.1 rpm while changing the impeller tip angles from 40° to 30° can only increase the Pump As Turbines rotational speed by 18.6 rpm. The alternator capacity that can be produced by Pump As Turbines is 100W, based on electrical power testing using a load of incandescent light bulbs. The electric power that can be generated by Pump As Turbines uses test samples at optimum conditions, namely the 90° Angle of Entry and the impeller tip angle 30° at the water pressure from the input pump 0.375 bar (g). The results of loading given using incandescent light bulbs with the power of 5 W, 10 W, 25 W, 40 W, and 100 W, there is the lowest voltage that is 194 V on a light bulb with 100 Watt power with alternator rotational speed of 855.7 rpm in the 3rd experiment.
Kaji Eksperimen Performa AC ½ PK Menggunakan Water Heater Engkos Koswara; Asep Rachmat; Saepul Mahmud
Prosiding Semnastek PROSIDING SEMNASTEK 2019
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Air Conditioner (AC) umumnya digunakan untuk mendapatkan kenyamanan suhu dalam aktivitas di sekitar ruangan. Saat digunakan, panas yang diserap dalam evaporator (unit indoor) dibuang ke kondensor (unit outdoor) tanpa digunakan sama sekali. Panas buangan dari kondensor dapat digunakan untuk memanaskan air, yaitu dengan menggunakan perangkat tambahan yang disebut Water Heater. Penggunaan ACWH atau (Air Conditioner Air Heater) akan mempengaruhi kinerja sistem AC. Oleh karena itu, perlu dilakukan analisis AC tanpa menggunakan Water Heater dan dengan AC yang menggunakan Water Heater (ACWH). Pengujian dilakukan di workshop Teknik Mesin Fakultas Teknik Universitas Majalengka. Pengambilan data untuk kedua pengujian dilakukan setiap 10 menit waktu berjalan hingga menemukan keadaan temperatur steady. Hasil kinerja AC tanpa Water Heater mendapat efek pendinginan sebesar 162,61 kJ / kg sedangkan AC menggunakan Water Heater mendapat efek pendinginan 161,84 kJ / kg, kemudian PF AC tanpa Water Heater memperoleh nilai PF 16,8 sedangkan PF Air conditioner yang menggunakan Water Heater hanya 11,1. Namun, dengan pendingin udara yang menggunakan Water Heater dapat memanaskan air hingga suhu rata-rata adalah 43,5 derajat C dalam 190 menit.
KAJI ANALITIK POTENSI DAYA LISTRIK PLTMH DI AIR TERJUN MUARA JAYA DESA ARGAMUKTI KABUPATEN MAJALENGKA PROVINSI JAWA BARAT Engkos Koswara; Dony Susandi; Asep Rachmat; Ii Supiandi
Prosiding Semnastek PROSIDING SEMNASTEK 2017
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Pembangkit Listrik Mikro Hidro (PLTMH) menjadi solusi alternative energy listrik yang cukup efisien karena hanya memanfaatkan jatuhan air yang tersedia. Disamping itu, program pembuatan PLTMH ini akan menjadikan Desa Mandiri yang dapat menghasilkan listrik dengan pemanfaatan air terjun.Komponen-komponen mikrohidro disesuaikan dengan kondisi nyata berdasarkan hasil survey yang dilakukan pada tahap awal. Secara umum komponen mikrohidro terdiri dari Bendung (Dam), Pintu pengambilan air (intake) dan Bak Penenang (Forebay), Pipa Pesat (Penstock), Saluran Pembuang (Tailrace), dan Rumah Turbin (Power House).Debit rencana yang dihasilkan adalah 0,21367 m3/s dengan menggunakan pipa 6 in dan tinggi jatuh effektif yang didapat adalah 4,67 m. oleh karena itu turbin yang digunakan adalah Turbin Crossflow. Dengan data tersebut daya yang dapat dibangkitkan sebesar 7,938 kW.
CENTER OF MASS (CENTROID) ANALYSIS ON ATV (ALL TERRAIN VEHICLE) TYPE ROKETS WIMCYCLE 110 CC Aggy Panca Suwanda; Asep Rachmat; Engkos Koswara
Jurnal Mekanika dan Manufaktur Vol 1 No 1 (2021)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (266.065 KB)

Abstract

In an ATV (All Terrain Vehicle) vehicle, the center of gravity is the point at which the vehicle will be in equilibrium. When the vehicle experiences translational and rotational motion at the same time, then at that time The center of gravity will act as the axis of rotation and the trajectory of motion, from the center of gravity This describes the trajectory of the translational motion. The center of gravity is a point of perfect balance or a center distribution of weight. At this point the gravitational force acts, for objects that are have any shape location center of gravity is searched by calculations, calculations are based on the assumption that we can take some points of the object you want to calculate the center of gravity multiplied by the weight at each point then add up and divide by the total weight at each point. It is said that the center of gravity is also the center of mass near the earth's surface, but for a certain height above the earth center of gravity and center of gravity must be distinguished. The distance from the center of mass when viewed from the side view is 0.42 m from the front axle and 0.48 m from the rear axle. The center of mass distance from the rear view is 0.35 m from the right wheel axis and 0.35 m from the left wheel. The height of the center of mass from the axis of the wheel axle is 0,39 m.
Reconditioning Load Cell Tensile Testing Machine Capacity 2 Ton Tarsudin Tarsudin; Engkos Koswara; Asep Rachmat
Jurnal Mekanika dan Manufaktur Vol 1 No 2 (2022)
Publisher : Universitas Majalengka

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Abstract

Test equipment is an educational laboratory facility that is very important in supporting and supporting the teaching and learning process in the laboratory. , load cell is an electronic device that is used as an additional device in a tensile testing machine. The tensile test results will be better or more accurate if the tensile test equipment is equipped with a load cell using a data device system. Obtained from this test, namely the stress value that occurs in the load cell, the stress on the ST37 steel specimen is 48.56 kg/mm², the maximum stress is 952.99 kg/mm². While the stress on the 6061 aluminum specimen is 15.6 kg/mm², and the maximum stress is 306.15 kg/mm². In addition to the workpiece that breaks due to tension, a tensile test curve is also generated. This curve is a description of the workpiece loading process from the beginning of the withdrawal to the end of the workpiece.
PYROLYSIS REACTOR ANALYSIS OF MATERIAL PRODUCTION RESULTS BURN WITH 3KG CAPACITY M Kitabika Damaputra; Dony Susandi; Asep Rachmat
Jurnal Mekanika dan Manufaktur Vol 1 No 2 (2022)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.589 KB)

Abstract

Garbage is one of the factors that damage the environment, basically garbage increases along with the increase in population and the level of consumption of the processing community Waste is two sides of a coin, waste recapitulation in 2020 in Majalengka Regency is data from the DLH (Environmental Service) Majalengka states that the population is 1,250,180 people produce 14,857 tons/day or 178,285 tons/year waste and transported or processed waste only 34,675 tons/year, this pyrolysis process is a thermochemical decomposition of organic material or inorganic processes that take place without air or oxygen where the raw material will undergo breakdown chemical structure into the gas phase, the plastic pyrolysis process requires several tools, namely a reactor as a combustion without air or oxygen from plastic so that it becomes gas, parameters including temperature which affects the change of plastic into gas, the pressure on the reactor tube caused by the thermal decomposition of plastic into pyrolysis gas, these parameters in the pyrolysis process are mutually tangent because the temperature of the combustion of the reactor will determine the resulting pressure, This is because the hotter the combustion in the reactor, the faster the pyrolysis process occurs, 180 minutes of the oil process produced by PP type plastic is 800 ml while LDPE type plastic is 500 ml, the results on the two plastics are different due to the difference in melting point temperature between types of plastic PP and LDPE, these parameters can be seen in the heat transfer in the pyrolysis reactor of 3.798 x 109 with turbulent flow type
DESIGN AND CONSTRUCTION OF WORK OBJECTS USING A MAGNETIC VENUE ON A DRILL MACHINE Angky Purwa Tarozzi; Asep Rachmat; Eidelweis Dewi Jannati
Jurnal Mekanika dan Manufaktur Vol 1 No 2 (2022)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (199.654 KB)

Abstract

The development of science and technology and along with advances in the field of industry, especially in the field of machinery, various tools were created to simplify and increase human comfort in fulfilling their needs. The workpiece gripping mechanism on the sitting drill machine works by being controlled manually using a control lever, making it difficult for the operator to operate and making the processing time long. The author will conduct research on the design of workpiece gripping tools using a magnetic vise on a drilling machine. It is hoped that the design of this magnetic vise can reduce the work of an operator and can shorten the time of installing the workpiece so that it can increase the work productivity of the drilling machine, reduce operating costs and increase the work safety of an operator. From the results of the analysis of the design of the Magnetic Vise designer, it can be concluded that the circular magnetic field around the wire is 8100π x 10-4 Tesla, Resultant of Magnetic Induction in Parallel Wire B1 = 18 x 10-5 Tesla and B2 = 10.8 x 10 -5 Tesla, Resultant magnitude of magnetic induction Bp = 28.8 x 10-5 Tesla. The solenoid is a coilshaped wire with fairly tight turns and has a length of = 360 cm with a number of turns = 150, the magnitude of the magnetic induction at the end of the solenoid is different from the magnitude of the magnetic induction at the center of the solenoid. The magnitude of the magnetic induction at the center of the solenoid is 45 x 10-5 Tesla. larger than the solenoid tip by 11.25 x 10-5 Tesla.
DESIGN OF MOVEMENT SYSTEM SHAKER SCREEN SEATHER MACHINE Crankshaft ROTATION Rahman Pebrian A R; Asep Rachmat; Nasim nasim
Jurnal Mekanika dan Manufaktur Vol 1 No 2 (2022)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (475.258 KB)

Abstract

The sand sieving machine, shaker screen, crankshaft rotational motion system, is a machine that facilitates building work in separating the mixture of sand and gravel. In the design and analysis related to the selection of the frame model in order to determine the strength of the material in holding each component of the sand sieving machine, this research uses solidwork software, based on the results of the solidwork software simulation, the stress value in the sieving tank is 3,303 N/mm2, the displacement value is 2,325 mm, the safety factor by means of a simulation of 4,059. The capacity of the shaker screen sand sieving machine has a volume of 0.824 with a length of 160 cm, a width of 70 cm and a capacity of accommodate wet and dry sand media weighing 30 kg.
ANALYSIS OF STEAM POWER PLANT RANKINE CYCLE EFFICIENCY ANALYSIS AT PT. PG RAJAWALI II JATITUJUH UNIT Azi Zauhari; Engkos Koswara; Asep Rachmat
Jurnal Mekanika dan Manufaktur Vol 2 No 1 (2022)
Publisher : Universitas Majalengka

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Abstract

Rankine cycle efficiency and rankine cycle work process at PT. PG Rajawali II Jati Tujuh Unit Adding knowledge to students about Rankine cycle in steam power generation system. To determine efficiency based on operational data. To know and understand the process of the Rankine cycle. It can be a reference and input for PT, PG Rajawali II Unit Jati Tujuh to see its efficiency. Before going into the field, we must prepare our theory according to the title such as boiler, turbine, condenser, pump example. This is a direct observation of the conditions at PT. PG Rajawali II Unit Jati Tujuh. This step is carried out to find out information about the conditions in the field and the situation where the practical work is carried out. Fractional pressure will not occur in the boiler and condenser, if the working fluid flows through the various components of a simple steam power cycle without irreversibility, and the working fluid will flow through the components at constant pressure. Dry water vapor from the boiler enters the turbine and undergoes a process isentropic expansion of the energy stored in the water vapor is converted into motion energy in the turbine. The water vapor is converted into liquid again so that it can be reused in the cycle process, PT. PG Rajawali II Unit Jati Tujuh on October 11, 2020 had the highest efficiency of 25.20%. October 22, 2020 has the lowest efficiency, which is 22.99%. Before going to the work process of the Rankine cycle, we must really understand the components related to the Rankine cycle, starting from the boiler, turbine, condenser, and pump so that we can understand and understand what the Rankine cycle is. In processing data using a help system, namely with Microsoft Excel with engineering applications, we have to ask those who know better so that in processing data with Microsoft Excel it can be actually clear in calculating it to get the values of pressure and temperature and their efficiency.
MODIFICATION OF THE DUST COLLECTOR TOOL ON A 3 AXIS CNC ROUTER MACHINE FOR WOOD WORKING Ahmad Yahya; Engkos Koswara; Asep Rachmat; Eidelweis Dewi Jannati
Jurnal Mekanika dan Manufaktur Vol 2 No 2 (2023)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jmm.v2i2.5306

Abstract

Based on the results of research in Majalengka Regency, it was found that there were 200 semi-finished wood processing secondary industries, spread over 26 sub-districts with the type of wood used being dominated by teak, mahogany, these types of wood are used for semi-finished materials in the form of frames, doors, windows, cabinets, sideboard and chairs. There is also production of wood that is native to Indonesia, namely wood carving. Wood carving has its own uniqueness because it is a human creation based on an aesthetic sense according to what the human himself wants. Wood carving works of art are usually created using sculpting techniques. The creation of works of wood carving with the arrangement of elements so that meaningful elements are formed and one must have creative sculpting skills to produce works that are good, attractive and have meaning and high aesthetic value as well as being useful in people's lives.
Co-Authors Aggy Panca Suwanda Ahmad Yahya Angky Purwa Tarozzi Azi Zauhari Dony Susandi Dony Susandi Eidelweis Dewi Jannati Encep Hilman Engkos Koswara Engkos Koswara Engkos Koswara Hendi Herdiyana Ii Supiandi M Kitabika Damaputra Moch Reza Fauzy Nasim Nasim Perly Sumirat Rahman Pebrian A R Riza M Yunus Saepul Mahmud Tarsudin Tarsudin