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Jurnal Teknologi
Published by Universitas Muhammadiyah Jakarta
ISSN : 20851669     EISSN : 24600288     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering
This journal is a scientific journal to develop knowledge in the field of Engineering & Technology. Editors invite professionals from education and researcher to write about the progress of science in the field of Engineering & Technology. The journal is published 2 (two) times in 1 year.
Arjuna Subject : -
Articles 303 Documents
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PENGARUH FRAKSI VOLUME SERAT SABUT KELAPA DENGAN INTI SERBUK GERGAJI KAYU SENGON TERHADAP KEKUATAN BENDING KOMPOSIT HYBRID SANDWICH Salman Salman; Muhammad Fajar; Muhammad Hazmi
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.167-174

Abstract

The use of composites from hybrid materials requires further research in particular with respect to their mechanical properties. The purpose of this research was to know the effect of volume fraction of fiberglass and coconut husk to the bending strength of composite sandwich hybrid. The main ingredients of this research were sengon sawdust as a composite core, fiberglass and coconut husk, with unsaturated polyester resin as matrix. Specimens were prepared with varying volume fractions of 10%, 20% and 30% for skins of fiberglass and coconut fiber and then were tested with bending tests. The results showed that the greater the volume fraction, the greater the bending strength beside that it also reduced the failure of the composites.
ANALISA BEBAN PENDINGIN PRODUK PADA CONTACT PLATE FREEZER TERHADAP KINERJA KOMPRESOR DI PT. TRIMITRA MAKMUR, TARAKAN, KALIMANTAN UTARA Samsi Samsi; Ade Hermawan; Teguh Binardi; M. Ilham; Istianto Budhi Rahardja
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.207-216

Abstract

Contact plate freezer (CPF) is a refrigeration machine unit to freeze products that will certainly maintain product freshness. The cooling system is running smoothly, one thing that should be noted is the cooling load on the contact plate freezer. Cooling load is the amount of heat absorbed per unit of time. Refrigeration cycle at PT. Trimitra Makmur, using a combined refrigeration cycle (multi-stage cycle), using two vapor compression cycles using two single-stage compressors. The two compressors used have the same power of 55.92 kW. As for the main components of the refrigeration system at PT. Trimitra is prosperous, among others: Compressors, condensers, expansion valves, and evaporators. The cooling load on the contact plate freezer consists of product heat load, water heat load, internal heat load, and transmission heat load. In the contact plate freezer, the load of infiltration or heat from the outside air is not calculated because at the time of production the door of the contact plate freezer is closed tightly so the value of air exchange is very small and can be ignored. In this research, it was found that the average total load on contact plate freezer 1 was 23.07079 kW, so that the average total load on all three contact plate freezers at PT. Trimitra Makmur is 69.21237 kW. From the results of data collection and calculation, the COP value in the high-stage cycle is 4.33, so the power of the high-stage compressor used is 1/4.33 of the cooling capacity of the contact plate freezer. While in the booster cycle, a COP value of 6.49 is obtained, so the booster compressor power used is equal to 1/6.49 of the cooling capacity of the contact plate freezer.
PEMBANGKIT ENERGI LISTRIK MEMANFAATKAN PENYERAPAN PANAS JALAN BETON MENGGUNAKAN TEKNOLOGI TERMOELEKTRIK GENERATOR (TEG) DENGAN PELAT PENYERAP TEMBAGA BERBENTUK I Nurman Saputra; Rahmat Iman Mainil; Azridjal Aziz
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.325-336

Abstract

Heat energy is energy that can be easily found in our daily lives, starting from the heat provided by nature, namely from the sun's heat, heat from chemical reactions, and heat generated by mechanical friction. If this heat energy can be converted into electrical energy, of course it will be able to help meet the increasing energy needs. Thermoelectric generator is a technology that can convert heat energy into electrical energy based on the seebeck effect. This research was carried out by utilizing the absorption of solar radiation heat on a concrete road with class III cast concrete type with K 450 as a thermoelectric generator placed on a medium with dimensions (550 x 300 x 100) mm. The research used 3 modules of thermoelectric generator type SP 1848 arranged in series, a heat sink filled with water and a copper plate in the form of I as an absorbent plate and heat transfer from concrete to TEG. The results of the tests conducted show that the maximum power generated in the concrete produces a power of 14.88 mW with a maximum solar radiation intensity of 1107 W/m2 and the largest temperature difference is 6.7 °C. By looking at the power generated continuously, this research allows it to be developed as an alternative energy.
ANALISIS BEBAN KERJA FISIK OPERATOR PANEN KELAPA SAWIT MENGGUNAKAN METODE BIOMEKANIKA Khairunnisa Khairunnisa; Meri Andriani; Wiky Sabardi
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.257-266

Abstract

Palm Oil Mill PT. Perkebunan Nusantara I (PKS PTPN 1) Tanjung Seumentoh is a company that processes palm oil into Crude Palm Oil (CPO) with a production capacity of 45 tons of Fresh Fruit Bunches (FFB)/hour with a factory area of ±10 Ha. Harvesting of oil palm fruit is done manually using the Egrek tool. The purpose of this study was to identify the compressive force and lift index of oil palm harvesting operators. The research stages, there are three stages of research, namely the first stage, namely the survey of the research location, the second stage of collecting research data on the number of workers, age of workers, weight of equipment, and height of equipment used to harvest oil palm fruit, the third stage is data processing using the Biomechanics method with calculations the maximum. Permissible Limit (MPL) Recommended Weight Limit (RWL). The method used, Biomechanics is divided into two methods, namely Maximum Permissible Limit (MPL) and Recommended Weight Limit (RWL). Results and discussion, from the calculation of RWL on 8 operators obtained an average Horizontal Multiplier (HM) 0.89, Vertical Multiplier (VM) 62,41625, Distance Multiplier (DM) 1.01875, Asymmetric Multiplier (AM) 1. MPL calculation from 8 operators obtained an average average Wtotal 421.79, Abdominal Pressure (PA) 1.8, Muscle force 681.79, Wrist Moment 1.05, Sacral Moment 11.47375, Total Moment 35.06. In conclusion, the compressive force on 8 oil palm harvesting operators with an average Recommended Weight Limit (RWL) of 1173.3 N and an average value of Maximum Permissible Limit (MPL) of 715.8 N. Workload on 8 operators with an average value -average 0. The method used, Biomechanics is divided into two methods, namely Maximum Permissible Limit (MPL) and Recommended Weight Limit (RWL). Results and discussion, from the calculation of RWL on 8 operators obtained an average Horizontal Multiplier (HM) 0.89, Vertical Multiplier (VM) 62,41625, Distance Multiplier (DM) 1.01875, Asymmetric Multiplier (AM) 1. MPL calculation from 8 operators obtained an average average Wtotal 421.79, Abdominal Pressure (PA) 1.8, Muscle force 681.79, Wrist Moment 1.05, Sacral Moment 11.47375, Total Moment 35.06. In conclusion, the compressive force on 8 oil palm harvesting operators with an average Recommended Weight Limit (RWL) of 1173.3 N and an average value of Maximum Permissible Limit (MPL) of 715.8 N. Workload on 8 operators with an average value -average 0. The method used, Biomechanics is divided into two methods, namely Maximum Permissible Limit (MPL) and Recommended Weight Limit (RWL). Results and discussion, from the calculation of RWL on 8 operators obtained an average.
PENGARUH BENTUK TURBULATORS TERHADAP EFISIENSI SOLAR AIR HEATER DENGAN PENAMBAHAN SENSIBLE HEAT STORAGE MATERIALS Faradin Adyatama; Intan Hardiatama; Mahros Darsin
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.175-188

Abstract

Indonesia is an equatorial country. This makes Indonesia has a very abundant source of solar energy in Indonesia. One of the tools that can be developed using solar energy is solar air heaters. In its application, solar air heaters have weaknesses, one of which is the low heat transfer coefficient. In this study a reasonable amount of turbulator and heat storage material is used to increase the proportion of heat research. The purpose of this research is to study the variation of turbulator variations and the distance of each turbulator that is 2.5 cm and 3.5 cm to the efficiency of solar air heaters. Tests carried out using three halogen lamps as solar radiation. The radiation beam is controlled with a dimmer and monitored via a digital multimeter. The value of the intensity of radiation used is 577 W/m2; 675.6 W/m2; 730.2 W/m2; and 881.2 W/m2. Blowers are used as forced convection with mass flow rates of 0.0083 kg/s. The results show that the shape of the crimp turbulator can increase efficiency twice as much as the staggered turbulator, which is 25% and 50%, respectively for each crimp turbulator and staggered turbulator. The addition of the turbulator distance in the crimp turbulator can increase efficiency by 5%. However, the magnitude of the turbulator in the staggered turbulator decreases efficiency by 5%. This proves the importance of spacing so that it can achieve optimal results.
UTILIZATION OF TELEMETRY SYSTEMS IN QUAIL FARMING USING THE IOT CONCEPT Mohammad Daffa Ananda; Yuliarman Saragih; Ridwan Satrio Hadikusuma
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.217-224

Abstract

Poultry is one of the sectors that has grown significantly, especially in Indonesia, because poultry farms, especially quail, can provide crops in the form of nutritious meat and eggs. In the information obtained, quail meat production increased by 26.86%, and eggs decreased by 4.69%. In the literature study obtained, when raising poultry, sometimes they experience a condition called heat stress caused by the room's air temperature and humidity or cage exceeding the comfort zone limits on the quail's body. To overcome this, this research product was made by utilizing IoT technology. There needs to be more there. In this study, a telemetry system was also implemented to determine set point values to deal with extreme temperatures and humidity and provide set point values at mealtimes so that they were on time. The results of the discussion data when the research product was implemented obtained an average temperature and humidity of 29°C and 72.1%, then for the results of the value data without implementing the research product it was obtained with a temperature and humidity value of 32.5°C and 57.2%. The difference in temperature and humidity is 3.5 and 14.9, which is quite significant. It can be said that the implementation of research products into quail cages can minimize extreme temperatures in them. Apart from that, in this study, it was also advised to provide vitamins mixed into the quail drink at the appropriate dose so that the quails stay healthy during the specified period.
ANALISA KERUGIAN PEMBANGKIT AKIBAT KEBOCORAN AIR MELALUI GUIDE VANE : STUDI KASUS PADA PEMBANGKIT LISTRIK TENAGA AIR BAKARU Nur Hamzah; Muhammad Ruswandi Djalal; Muhammad Sulfajar Mas’ud
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.337-344

Abstract

To maintain the reliability of the plant so that it continues to operate optimally, therefore the company management has arranged several scheduled maintenance activities. The result of the delay in maintenance had an impact on some equipment so that it suffered fatal damage. One of the mechanical problems that occur in PLTA BAKARU is water leakage that occurs in the guide vane. At the PLTA Bakaru unit, the impact of this guide vane leak can cause the generator to trip with an indication of 133 QBL and require the unit to leave the concession for some time. Thus the result of the disturbance becomes a loss for the company because it cannot produce electricity. From the results of the analysis, it was found that the amount of water needed to generate 1 kwh in unit 1 of PLTA Bakaru was 0.000295 m3 / s, the amount of energy loss caused by leaks in the guide vane was 121,975,031 kWh in 2015; 41,933.26 kWh in 2016; 135,591.42 kWh in 2017; and 518,637.17 kWh in 2018, power losses also occurred in the use of pumps for handling leakages of 75 kW. the amount of water consumption continued to increase from 2015 to 2018 before the overhaull and after overhaul maintenance the SWC value decreased to 0.29365 at 63 MW unit load operations.
ANALISIS LAJU KOROSIF FLUIDA CAMPURAN REFINERY BLEACHING DEODORIZE PALM (RBDP) OLEIN DAN ETHYLENE GLYCOL (EG) PADA BAHAN METAL Istianto Budhi Rahardja; Azhar Basyir Rantawi; Hendra Saputra; Dian Oktavia Pambudi
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.267-274

Abstract

Corrosion to metal materials contaminated by liquid fluids is strictly avoided and maintained, which will result in damage and erosion of the material. Metal materials are very easy to corrosion when contaminated with fluids. The fluid mixture given is RBDP Olein from refined palm oil (CPO) and EG. The research method used was experimental, in which metal objects were immersed in the RBDP Olein & EG fluid mixture for a certain time (± 3 months), by weighing the mass before and after immersion in the fluid mixture. The results of the mass weighing test obtained that the reduction was not significant at all, namely: 0.01 gr (0.25%) for ± 3 months from the initial mass of the object with a corrosion rate value of 1.25605E-07 mm/y , as well as on the microstructure test of the object the workpiece has no defects, scale, or erosion that occurs on the workpiece, so that the workpiece does not a corrosive rate in the RBDP Olein & EG fluid.
PERANCANGAN MESIN MODIFIKASI CAMSHAFT TIPE SINGLE CUTTER MENGGUNAKAN AUTODESK INVENTOR Aljufri Aljufri; Abdul Rahman; Syarifah Akmal; Ranu Firmansyah; Abdul Ali Chaniago
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.299-304

Abstract

Camshaft is one of the main components of a 4-stroke motorcycle where the Camshaft has a function as a regulator of opening and closing valves in the working process of the engine itself.  The profile of the camshaft that is thirsty due to friction so that it must be replaced with a new one or do cam turning using a grinder. The purpose of this design is to design a camshaft engine, which is designed to facilitate the work of mechanics, especially motorcycle mechanics. and can be used as a tool to modify the camshaft setandart into camshaft racing. This engine will be able to produce Camshaft racing. In the process of machine design is carried out in several stages, namely analyzing needs, defining and listing design requirements, designing product concepts, and designing products and documenting products in the form of machine design drawings. The energy source is supplied from electricity. The results of this design resulted in the design and working drawings of camshaft modified engine products including shafts, camshaft mounts, pulley mounts, engine frames, and transmission systems. In this design, camshafts will also be tested with 3 variations of camshaft profiles to determine the value of power and torque due to changes in camshaft diameter. From the three test results, standard camshaft variations and modifications found changes in power and torque values which increased in value by 1 hp and clutch slip occurred during the dayno process which showed a fracture at engine speed 8000 rpm.
PROTOTYPE DOORSTOP WITH RFID SENSORS ARDUINO-BASED AS A VEHICLE SECURITY SYSTEM AT UNIVERSITIES Muhammad Hanief; Luthfil Hadi Nugroho; Mia Galina
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.225-236

Abstract

The rapid development of technology marks an advance in creating tools that can help people work, such as one of the technologies being developed by the author, namely Smart Parking technology using RFID (Frequency Radio Identification). RFID is a wireless technology for short-distance data transfer. The nature of RFID allows this technology to become an effective vehicle safety system. RFID technology can record incoming and outgoing data using a registered card. The author tried to implement and develop this RFID into a simple and easy-to-use security device. The tool will be tried in the experiment with two registered cards and one unregistered card 10 times each. The authors tried to test how accurate RFID readers were at reading registered cards. In addition to RFID, the authors also use ultrasonic sensors to detect passing vehicles. The test results showed that the RFID reader could function adequately and read with the right degree of accuracy and an average time of 0.6 seconds. In addition, the authors also included trials using barriers in RFID aimed at identifying the extent to which frequencies in RFID can work even if other objects still block them, the result being that RFID readers can still read cards registered at a distance of 1.5cm and barrier thicknesses of up to 2.0mm. In the trial period, the author felt quite satisfied with the results of the device's performance, but the author thought that the device could still be developed.

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