Journal of Engineering Science and Technology
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Analisis Performa Sepeda Motor Sistem Injeksi 110 CC Menggunakan ECU Standar dan ECU Standar Remap
Full text linkThe aim of this research is to analyze the effect of remapping maximum engine speed with standard ECU variations and ECU remapping on the performance of a 110cc injection motorbike engine. In this research, dynotest testing was carried out on 110cc injection motorbikes of various types of standard Electronic Control Unit (ECU) and standard Electronic Control Unit (ECU) by taking test results at engine speeds of 3000 rpm-8000 rpm with a range of 1000 rpm. The calculation method is to calculate power and torque. The test results using a dynotest tool based on power and torque obtained data as above, where the highest power and torque from the standard ECU variable was obtained at 7.4 HP and the highest torque at 9.38 Nm. Meanwhile, using the standard ECU remap, the highest power is 7.6 hp and the highest torque is 9.52. The results of the dynotest test and also calculations from Origin Pro with a comparison using a standard ECU and a remap standard ECU concluded that the use of a remap standard ECU can provide an increase in power and torque in the motorbike engine. When using a standard ECU remap, the results show that the standard ECU that has been remapped actually provides higher improvement results than the standard ECU that has not been remapped
Pengaruh Variasi Arus Pada Pengelasan SMAW Terhadap Uji Kekuatan Bending dan Struktur Micro Baja ST 42
Full text linkThis research aims to analyze the effect of variations in welding current on the mechanical strength of ST 42 steel using the SMAW welding method and E6013 electrodes with a diameter of 3.2 mm. The variations in welding current used are 90A, 100A and 110A. The tensile test results show that a welding current of 110A produces the highest tensile test value with a yield point (YP) of 8,368 MPa, maximum stress (MAX) of 9,890 MPa, and break point (BREAK) of 5,283 MPa. Bending tests indicate that a welding current of 110A produces the highest bending strength of 10.118 MPa. Microstructural observations revealed that the highest percentage of pearlite was present in welding with a current of 110A, which contributed to an increase in the tensile strength of the material. From the results of this research, it can be concluded that the increase in welding current is directly proportional to the increase in the mechanical strength of ST 42 stee
Design of Air Conditioning Systems
Full text linkClimate change is one of the most pressing global problems today. Today, global warming is observed throughout the earth. As a result, the design of the natural ventilation system in the rooms does not meet the sanitary and hygienic requirements for the ventilation system. Designing an air conditioning system, choosing the right air conditioners requires the necessary knowledge and skills. Today there are many types of air conditioners. What parameters are taken into account when choosing air conditioners, what calculations are made
Perhitungan Neraca Massa Pada Reception Oil Tank di Stasiun Klarifikasi PKS XYZ Sumatera Utara
Full text linkReception Oil Tank (ROT) is a unit at a clarification station that has a function as a temporary storage tank for filtered crude oil from the vibro-separator unit and also to retain heat. In this ROT, the heat provided comes from direct injection of hot steam and steam coils with temperatures ranging from 90-95 0C. This research was conducted with the aim of determining the flow rate of materials into and out of ROT using the principle of mass balance and determining the levels of each component in the oil in ROT before further processing. Based on the results of the mass balance calculation, it was obtained that the flow rate of crude oil entering ROT was 10794.2 kg/hour. The composition content of the materials entering ROT in 10 mL includes 37.6% oil, 26.6% water and 35.8% non-oil solid while the composition levels of materials leaving ROT to CST include 41.6% oil, 27% water, and non-oil solids 31.4%. The oil content has increased during the process that occurs in the ROT at the clarification station
Pengaruh Variasi Bentuk Kampuh Las TIG (Tungsten Inert Gas) Terhadap Uji Tarik dan Struktur Mikro Pada Material Plat Stainless Steel 201
Full text linkWelding technology has an integral role in the manufacturing technology domain. To create high-quality structures requires technology that allows joining metals. It is in this phase that welding technology comes into play. TIG (Tungsten Inert Gas) welding is a form of tungsten gas arc welding, where the electrode acts as an arc supplier that does not melt during the welding process. The Gas Tungsten Acr Welding technique is generally used more on light metals such as magnesium, aluminum, and stainless steel, and other types of metal. This type 201 carbon steel has several mechanical characteristics, including a tensile strength of 580 Mpa, an elastic limit (yield strength) of 198 Mpa, an elongation rate of 50%, and a hardness of 87 HRBI. The aim of this research is to determine the tensile strength and microstructure of TIG (Tungsten Inert Gas) welding results with 45 degrees of V, U and J seams. This research was carried out with several flat 2D test models of 45 degrees of V, U and J seams with current. 110 - 120. This research was conducted at the Banyuwangi Job Training Center, in the Materials Laboratory for Mechanical Engineering at Sebelas Maret University, Surakarta and at the Mechanical Engineering Laboratory at Jember State University. In this research, the results of changes in tensile strength were quite significant. The lowest tensile strength value is found in the J weld seam with an average value of 394.4 MPA. Meanwhile, the highest tensile strength value is found in the V weld seam with an average value of 531.1 MPA. The results of the microstructure for J seam have the largest phase grains and V seam forms the smallest phase grains compared to the others. Kampuh V has quite a large number of grains because they are relatively small and dense
Analisa Karakteristik Pembakaran Biopelet Berbahan Limbah Kelapa Muda Dengan Penambahan Variasi Zeolit Alam
Full text linkBiomass is a type of solid waste that is used as an alternative energy source to replace fossil fuels (petroleum) because it can be renewed. Biopellets are a renewable fuel that comes from biomass. The aim of this research is to determine the characteristics of coconut waste biopellets. young with the addition of zeolite variations. The research method used is experimental research. The zeolite material used has 6 dosage variations, namely 0% (0 gram), 5% (2.5 grams), 10% (5 grams), 15% (7.5 grams) , 20% (10 grams), 25% (12.5 grams), with fixed variations from 50 grams of young coconut waste, tapioca flour adhesive and 20 grams of sugar cane molasses. The best burning rate of young coconut waste biopellets was obtained with the T 5 biopellet composition with a molasses adhesive composition with the addition of 5% zeolite with a value of 0.017% g/s. and the lowest water content value is found with the T 25 biopellet composition using molasses adhesive with a 25% zeolite mixture. And the best ash content value can be with P 0 biopellet composition using tapioca flour adhesive without zeolite mixture with a value of 3.32%
PENGGUNAAN TEKNIK IMMERSION COOLING PADA PENDINGINAN PANEL SURYA
Full text linkRenewable energy that is now widely loved is solar energy, which can be converted into electrical energy with the help of solar panels. Solar panels are made of semiconductor silicon which absorbs photons from the sun's energy. However, the sun does not only produce photons which can be converted into electrical energy, but there is also heat energy which can increase the temperature of the solar panels which can reduce the performance of the solar panels. Therefor researchers conducted research to reduce the temperature of solar panels by using the monocrystalline solar panel cooling method using mineral oil with the immersion cooling technique. However, from the experimental data in the field, it was found that the results were not good where solar panels without cooling were more than solar panels with cooling. The anova analysis test which was continued with the Tukey method confirmed that the voltage and current of the uncooled solar panels were superior, namely 4.48 V and 0.94 A. Solar panels with a 3cm cooling liquid variation produced a power of 3.93 W while non-liquid solar panels The cooler produces a power of 4.81 W, so research on cooling solar panels using liquid mineral oil with immersion cooling techniques has not succeeded in increasing the performance of solar panels and cannot be applied to PLTS
Karakterisasi Metil Ester Dari Minyak Biji Bunga Matahari dan Minyak Zaitun di Bawah Katalis KOH
Full text linkFatty acid methyl esters can be obtained from the synthesis of vegetable oil with methanol using a base catalyst. Vegetable oil has potential as biodiesel feedstock, the methyl ester character of various vegetable oils is different, for example from sunflower seed oil and olive oil. The synthesis of methyl esters by conventional transesterification reactions generally takes 1-2 hours. The purpose of this study was to synthesize methyl esters from sunflower seed oil and olive oil with a KOH catalyst and to determine the yield and its characteristics. This research is a type of laboratory experimental research. The research was carried out in 3 stages which included (1) determination of the free fatty acid content (ALB) of the oil, (2) transesterification of the oil with methanol and potassium hydroxide as a catalyst, and (3) characterization of the synthesized methyl ester which included density, viscosity, and number. acid. The results showed that the yield of methyl esters synthesized by transesterification reaction of sunflower seed oil was 95.61% and the yield of methyl esters synthesized by transesterification reaction of olive oil was 95.09.%. The methyl ester characters synthesized from sunflower seed oil are, density of 0.906 g/mL, viscosity of 5.035 cSt, acid number of 1.21 g KOH/g. The methyl ester characters synthesized from olive oil by transesterification reaction are density of 0.909 g/mL, viscosity of 12.203 cSt, acid number of 0.629 g KOH/g
Peningkatan Kualitas Briket Ampas Kopi Menggunakan Perekat Kulit Jeruk Melalui Metode Torefaksi Terbaik
Full text linkEnergy is generally divided into two, the first is non-renewable energy for example oil, coal, and natural gas while the second is renewable energy such as water power, solar power, wind power, and biomass. Briquettes is one of the developments of biomass as an alternative fuel. The purpose of this study was to make and analyze the characteristics of coffee grounds briquettes using an adhesive from orange peel with torrefaction method. Torrefaction is a low temperature (200-300 oC) carbonization process without oxygen. Briquettes are made by percentage of coffee grounds and orange peel adhesive 70% : 30%, 60% : 40%, and 50% : 50%. Torrefaction process with a temperature of 200 oC within 60 minutes without any air or little air in the furnace with the addition of modified elbows. The results showed that the best composition was found in DK1 with a ratio of 70% coffee grounds with 30% orange peel adhesive, which has density 0.49 gr/cm3, water content 5.11%, volatile matter content 78.33%, bound carbon content 17.31%, 0.62% ash content, and 4656 cal/gr calorific valu
Rancang Alat Pencacah Rumput Pakan Ternak Tenaga Surya Berbasis Mikrokontroller Dengan Sinar UV Sebagai Penghigienis Rumput
Full text linkThe innovation of a lawn mower using a microcontroller based solar energy system combined with UV LED light as a microbe minimizer aims to increase the innovation of the lawn mower by using the PLTS system from the use of sunlight that is cleaner and more efficient which replaces fossil fuels from diesel and turns grass into grass. The chopper results are more hygienic for ruminant livestock. The innovation of the lawn mower in this activity is presented in the form of a ready to use machine. The method used in the realization of the concept and design as well as the design of the tool is carried out by going through the literature study stages, designing tool design concepts, designing tool making, and testing tool performance. main frame: height 200cm, width 50cm, length 60cm with a thickness of 4 mm angled iron frame, chopper cover componen 50 cm long and 15cm wide, axle iron components 1,5 inch, the diameter of the chopping knife blade is a 30cm using an AC motor drive. Total electrical energy and tool performance generated by the solar power system on the Smart Machine Grass chopper for 2 hours when the engine is running without charging, the average voltages is 14,62 Volts, current is 2,08 Ampere, and produces an average energy of 6,18 watts and obtained the performance of the tool in chopping grass of 63,4 kg for 2 hours with an average of 2,64 kg every 5 minutes