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JOURNAL OF SCIENCE AND APPLIED ENGINEERING
Published by Universitas Widyagama
ISSN : 26213753     EISSN : 26213745     DOI : -
Core Subject : Science, Education, Social, Engineering,
Aerospace Engineering Computer Science & IT Electrical & Electronics Engineering Engineering Social Sciences Other
ournal of Science and Applied Engineering (JSAE) is an open access peer-review journal, and is aimed to disseminate original research in all fields of Electrical Engineering, Mechanical Engineering, Civil Engineering, Industrial Engineering and Informatics Engineering and presents the latest development and achievements in scientific research in Indonesia and overseas to the world’s community. Only original, innovative and novel papers will be considered for publication in the JSAE. The authors are required to confirm that their paper has not been submitted to any other journal in English or any other language. The JSAE welcome contributions from all who wishes to report on new developments and latest findings in science and applied engineering.
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Articles 81 Documents
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Analysis of Hydrogen Gas Production Results in Water Electrolysis Process on Genset Characteristics Djoko Hari Praswanto; Soeparno Djiwo; Bima R. P. D Palevi
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 1 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i1.4236

Abstract

Hydrogen gas is a type of alternative fuel for transportation that can serve a number of other potential needs. Water electrolysis is one way to get hydrogen gas. This study aims to determine the results of water electrolysis with three catalysts and mixed metal electrodes which are then applied to generator motor engines. The research method used was an experimental method with variations in electrolysis using KOH and NaOH base catalysts, H2SO4 acid catalysts, and stainless steel 316 electrodes. The best results for H2 gas production in this study were obtained with a 2M H2SO4 catalyst with a gas yield of 244.9mL H2 gas, while The lowest yield in this study was the 1M concentration of 1M NaOH catalyst of 12.5mL. The best results for H2 gas production were varied with pertalite fuel and then tested with a generator engine. Testing the generator motor engine is measured arm length and mass with a machine dynamometer. After testing, the data is obtained which is then analyzed to obtain the value of torque (Nm) and electric motor power (kW), and driving motor power (HP). The maximum energy produced pertalite + H2 gas has increased by 2.27kW on the electric motor and power of 4.13HP on the driving motor, while for pertalite fuel alone the power generated is 1.44kW on the electric motor and power of 2.62HP on the driving motor.[1]        S. A. Grigoriev, V. N. Fateev, D. G. Bessarabov, and P. Millet, “Current status, research trends, and challenges in water electrolysis science and technology,” Int. J. Hydrogen Energy, vol. 45, no. 49, pp. 26036–26058, 2020, doi: 10.1016/j.ijhydene.2020.03.109.[2]        Y. Song, X. Zhang, K. Xie, G. Wang, and X. Bao, “High-Temperature CO2 Electrolysis in Solid Oxide Electrolysis Cells: Developments, Challenges, and Prospects,” Adv. Mater., vol. 31, no. 50, pp. 1–18, 2019, doi: 10.1002/adma.201902033.[3]        A. Nechache and S. Hody, “Alternative and innovative solid oxide electrolysis cell materials: A short review,” Renew. Sustain. Energy Rev., vol. 149, 2021, doi: 10.1016/j.rser.2021.111322.[4]        O. Schmidt, A. Gambhir, I. Staffell, A. Hawkes, J. Nelson, and S. Few, “Future cost and performance of water electrolysis: An expert elicitation study,” Int. J. Hydrogen Energy, vol. 42, no. 52, pp. 30470–30492, 2017, doi: 10.1016/j.ijhydene.2017.10.045.[5]        S. Wang, A. Lu, and C. J. Zhong, “Hydrogen production from water electrolysis: role of catalysts,” Nano Converg., vol. 8, no. 1, 2021, doi: 10.1186/s40580-021-00254-x.[6]        N. A. Burton, R. V. Padilla, A. Rose, and H. Habibullah, “Increasing the efficiency of hydrogen production from solar powered water electrolysis,” Renew. Sustain. Energy Rev., vol. 135, no. July 2020, p. 110255, 2021, doi: 10.1016/j.rser.2020.110255.[7]        J. Brauns and T. Turek, “Alkaline water electrolysis powered by renewable energy: A review,” Processes, vol. 8, no. 2, 2020, doi: 10.3390/pr8020248.[8]        S. Anwar, F. Khan, Y. Zhang, and A. Djire, “Recent development in electrocatalysts for hydrogen production through water electrolysis,” Int. J. Hydrogen Energy, vol. 46, no. 63, pp. 32284–32317, 2021, doi: 10.1016/j.ijhydene.2021.06.191.[9]        W. Tong et al., “Electrolysis of low-grade and saline surface water,” Nat. Energy, vol. 5, no. 5, pp. 367–377, 2020, doi: 10.1038/s41560-020-0550-8.[10]      T. Nguyen, Z. Abdin, T. Holm, and W. Mérida, “Grid-connected hydrogen production via large-scale water electrolysis,” Energy Convers. Manag., vol. 200, no. September, p. 112108, 2019, doi: 10.1016/j.enconman.2019.112108.[11]      A. Buttler and H. Spliethoff, “Current status of water electrolysis for energy storage, grid balancing and sector coupling via power-to-gas and power-to-liquids: A review,” Renew. Sustain. Energy Rev., vol. 82, no. February, pp. 2440–2454, 2018, doi: 10.1016/j.rser.2017.09.003.[12]      I. V. Pushkareva, A. S. Pushkarev, S. A. Grigoriev, P. Modisha, and D. G. Bessarabov, “Comparative study of anion exchange membranes for low-cost water electrolysis,” Int. J. Hydrogen Energy, vol. 45, no. 49, pp. 26070–26079, 2020, doi: 10.1016/j.ijhydene.2019.11.011.[13]      L. Peng and Z. Wei, “Catalyst Engineering for Electrochemical Energy Conversion from Water to Water: Water Electrolysis and the Hydrogen Fuel Cell,” Engineering, vol. 6, no. 6, pp. 653–679, 2020, doi: 10.1016/j.eng.2019.07.028.[14]      S. Klemenz, A. Stegmüller, S. Yoon, C. Felser, H. Tüysüz, and A. Weidenkaff, “Holistic View on Materials Development: Water Electrolysis as a Case Study,” Angew. Chemie - Int. Ed., vol. 60, no. 37, pp. 20094–20100, 2021, doi: 10.1002/anie.202105324.[15]      H. K. Ju, S. Badwal, and S. Giddey, “A comprehensive review of carbon and hydrocarbon assisted water electrolysis for hydrogen production,” Appl. Energy, vol. 231, no. May, pp. 502–533, 2018, doi: 10.1016/j.apenergy.2018.09.125.[16]      F. ezzahra Chakik, M. Kaddami, and M. Mikou, “Effect of operating parameters on hydrogen production by electrolysis of water,” Int. J. Hydrogen Energy, vol. 42, no. 40, pp. 25550–25557, 2017, doi: 10.1016/j.ijhydene.2017.07.015.[17]      F. Gutiérrez-Martín, L. Amodio, and M. Pagano, “Hydrogen production by water electrolysis and off-grid solar PV,” Int. J. Hydrogen Energy, vol. 46, no. 57, pp. 29038–29048, 2021, doi: 10.1016/j.ijhydene.2020.09.098.
Add-On Energy Harvesting of Diesel Exhaust Muffler Using Thermoelectric Generator Aditya Wahyu Winadi Atmajaya; Purbo Suwandono
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 1 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i1.4663

Abstract

Trends Light fossil fuel vehicles are now turning to electricity. The electric vehicle transition begins with a hybrid car. The Hybrid vehicle uses an internal combustion engine as a generator. Controller systems, driving safety and entertain light vehicles are growing so that they consume a lot of electricity, Safe devices and driving lifestyle support. An additional battery charging system for a hybrid car now is being developed by the automotive manufacturer at least the system can increase the fulfilment of electricity consumption needs.The charging system can utilize waste energy vehicle itself or even from outside the vehicle system. In this research, the author wants to explore the thermal energy harvesting system in the remaining exhaust gases. The concept of this research is to develop a Thermoelectric Generator (TEG) as a power producer. The heat source uses a 140kW diesel engine with a heat potential of 523K at stationary conditions, and an exhaust velocity of 1407.05 m / s. This study demonstrates the potential prototype TEG then compared Ansys simulation and manual calculations as the first step for further research. The results obtained, the Exhaust TEG can produce a voltage of 2.1 Volt at 30 seconds of data collection. The cooling system on the TEG exhaust from the HVAC cooler with a temperature of 289K and a Velocity of 0.8 can produce a significant temperature difference.Keywords: Diesel Engine, Thermoelectric, Exhaust TEG system, Electricity.
Influence of Annealing on Warping Angle on Polylactic Acid in Fused Deposition Modeling 3D Printer Leo Hutri Wicaksono; Akhmad Farid
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 1 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i1.4711

Abstract

The industrial world has been developing at an increasingly rapid pace. The use of additive manufacturing technology is increasingly being used by various companies around the world. Fused deposition modeling (FDM) is a type of 3D printing that falls under the category of material extrusion. It is also known as fused filament fabrication (FFF). Fused deposition modeling (FDM) is the most cost-effective additive manufacturing technique. Polylactic acid (PLA) is a type of plastic that is made from renewable resources such as corn starch, tapioca roots, chips or starch, or sugarcane. It is biodegradable and bioactive and can be used for a variety of applications such as packaging materials, disposable tableware, medical implants, and 3D printing. PLA is also used in the food industry as a food packaging material. The goal of this study is to analyse the warping angle of PLA. In this study, the commercial eSUN PLA filament manufactured by Shenzhen Essun Industrial with a diameter of 1.75 mm was used. This study used experimental method with predetermined conditions such as ISO 527-2 printed specimens, annealing temperature at 50⁰C and 70⁰C. The test result shows that annealing at 50⁰C have the highest degree of side view 1.88⁰, and 1.32⁰ on average. The top view have 2.21 ⁰ and 1.19 on average. Afterwards, the study shows that annealing at 70⁰C have the highest degree of side view 6.19⁰, and 3.96 on average. The top view have 3.84⁰, and 2.33⁰ on average.
The Effect of Using a Heat Collection Filter on the Efficiency of Heat Absorption from the Flame of LPG Gas Fuel Akhmad Farid; Gatot Soebiyakto
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 1 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i1.4729

Abstract

One of the uses of heat from fuel combustion is for the needs of cooking activities. The heat from the combustion reaction heats the surface of the pan, this occurs in the process of heat transfer by convection on the surface of the pan. The rooting reaction of LPG fuel produces a flow of combustion gas with a high flow speed. This will have the consequence that the heat wasted is very large while the absorbed is very small in the process of heating the surface of the pan. To increase heat absorption by the surface of the pan can be done by inhibiting the flow when the fire touches the surface of the pan. This study will examine how the effect of using a heat collection filter on the heat absorption efficiency of the flame of LPG fuel gas and aims to compare the heat absorption efficiency of a fuel gas flame using a heat collection filter with no heat collection filter (conventional). This study uses independent variables in the form of heat absorption without a heat collection filter and with a heat collection filter, as well as variations in LPG gas flow capacity. While the dependent variable observed is the heating time to obtain heat absorption efficiency. The results showed that convection heat absorption using a heat collection filter has a higher efficiency than without using a heat collection filter at various LPG gas flow capacities
Image Classification of Tempe Fermentation Maturity Using Naïve Bayes Based on Linear Discriminant Analysis Dio Amin Putra; Istiadi Istiadi; Aviv Yuniar Rahman
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 1 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i1.4655

Abstract

One of the foods in Indonesia that has a lot of nutritional content and benefits, one of which is tempeh. Tempe is usually made by fermenting soybeans with mold under special conditions to become tempeh. In the fermentation process, tempeh producers need to monitor the maturity of the tempeh until it is suitable for consumption. To detect this maturity requires a separate effort, so that an image processing approach is proposed in this study with the support of feature selection. An image allows for various features to be taken, such as texture features using GLCM and various color features including RGB, HSV, LAB, CMYK, YUV, HCL, HIS, LCH. With so many features, it is necessary to do a selection so that computation in its classification becomes efficient. This study aims to classify tempeh fermented images using the Naive Bayes method with Linear Discriminant Analysis (LDA)feature selection for GLCM features and eight color features. Tempe fermentation image is divided into three classes, namely raw, ripe and rotten. Based on the experimental results, the average accuracy in the test is 84.06%. In testing the fastest time is 1.87 seconds and the longest is 2.20 seconds. This shows that the classification of fermented tempeh maturity with Naive Bayes with LDA feature selection can work well.
Customer Experience Analysis Skincare Products Through Social Media Data Using Topic Modeling and Sentiment Analysis Muhammad Habibi; Kartikadyota Kusumaningtyas
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 1 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i1.4169

Abstract

Currently, skin care products (skincare) are popular among the public. Both men and women are interested in buying skin care products. Moreover, there are many brands of skin care products that are divided into several types of facial and body care, such as moisturizers, toners, cleansers, and masks. Therefore, many consumers take the time to find information, for example, in terms of price, quality, and brand for decision-making. A lot of useful information is in the form of Twitter messages known as tweets which are sent from people who use skin care products because Twitter is one of the online social media where users can share their opinions and experiences. However, consumers still have to spend a lot of time searching, reading, and understanding the comprehensive collection of tweets before buying skin care products.The purpose of this study is to analyze customer experience, analyzing automated tweets about skin care products. Tweets about skin care products will be subjected to a topic modeling process to find out what topics are being discussed. In addition, the topics that have been obtained will be subject to sentiment analysis in the form of positive and negative messages for skin care products. Consumers who are app users don’t waste time reading and analyzing large amounts of data manually and they can decide to buy skin care products more easily.The results of this study obtained 14 topics of discussion related to skincare. Meanwhile, the sentiment analysis results of 14 topics resulted in more positive sentiment class tweets overall. It related the category topic that has the number of tweets to the importance of skincare. In addition, categories related to ingredients for skincare products from nature, namely fruits and spices, are the topics that have the second highest number of tweets. The results of the analysis of tweets related to user experience on Twitter, it was found that users prefer skincare products that use ingredients from nature.
Redesign of Facilities Layout Using Computerized Relationship Planning (CORELAP) and Computerized Relative Allocation of Facilities Techniques (CRAFT) Methods Yuninda Wulan Sari; Chauliah Fatma Putri; Andy Hardianto
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 1 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i1.4739

Abstract

The Barokah Jaya Snack Industry is an MSME engaged in the manufacture of jipang rice and popcorn. Based on the results of direct observation, it is known that the main problem is operator complaints in picking up raw materials that are often used too far away and the placement is not close together so that the distance becomes long. This research looks for alternative solutions to problems in the scope of production in the Barokah Jaya Snack Industry, by making redesign proposals using the CORELAP (Computerized Relationship Layout Planning) and CRAFT (Computerized Relative Allocation of Facilities Technique) methods. The total displacement moment in the design using the CORELAP method is 1,978.75 meters/month, and in the design using the CRAFT method is 1,755.8 meters/month. The Material Handling Cost (OMH) for the design using the CORELAP method is Rp. 811,288/month and the design using the CRAFT method is Rp. 719,892/month. The layout resulting from the CORELAP method provides a material flow efficiency of 45.88% against the initial layout and the layout resulting from the CRAFT method provides a material flow efficiency of 51.98%. The selected layout recommendation has a total material displacement moment that is smaller than the initial layout and the smallest among the other alternative layouts. The selected layout is the layout designed using the CRAFT method, which is 1,755.8 meters/month increasing the efficiency of material flow by 51.98% and saving material transfer costs of Rp. 778,146/month.
Stabilization of Expansive Soil Using Marble Powder and Phosphoric Acid against Physical Properties and SEM-EDS Tests Ambrosio Martins Nuno; Syahril Syahril
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.4794

Abstract

The Gedebage region faces a myriad of challenges, including road deformations, swelling of roads and bridges, and cracks in drainage foundations, buildings, and asphalt concrete. To address these issues, a comprehensive analysis of soil physical properties was conducted at the POLBAN soil mechanics laboratory, along with chemical tests at the POLMAN laboratory. The primary objective was to understand the physical properties and mineral composition of Gedebage soil and develop effective soil management strategies. Soil stabilization was employed as a method to enhance infrastructure resilience in Gedebage. Marble powder waste (MPW) was utilized in varying concentrations (2.5%, 4%, 5.5%, and 7%) along with 4% phosphoric acid (PA) to optimize the solution. MPW filled soil pores and improved cohesion, while PA reduced moisture content, enhanced particle bonding, increased load-bearing capacity, and minimized soil volume changes. Initial soil tests revealed a high plasticity index (PI) of 54.20%, indicating Gedebage, expansive clay soil nature with significant potential for expansion and plasticity. The AASHTO classified it as "A-7-6", and the USCS classified it as "CH." Stabilization experiments demonstrated that the most effective combination was the original soil + 7% MPW + 4% PA, resulting in a PI of 16.03% and an activity level (Ac) of 0.48. AASHTO classified this combination as "A-2-6," and the USCS as "CL." Furthermore, MPW oxygen, silica, and aluminum content exhibited potential for pozzolanic reactions, while PA reacted with soil mineral cations likes: Ca, Fe, Al dan Phosphor, forming a water-resistant layer. MPW and PA effectively improved the expansive clay soil's ability to withstand moisture-induced changes. This study serves as a foundation for further investigations into the mechanical properties of Gedebage soil, focusing on bearing capacity and stability, using MPW and PA in civil and infrastructure foundation applications.
Analysis of Queuing Systems at McDonald's Outlets in Malang with an Arena Simulation Approach P Rahayu; Sukram Sukram; S Nugrowibowo
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.5016

Abstract

The purpose of this research is to analyze the queuing system at McDonald's outlets in Malang City using the Arena simulation approach. The novelty of this research is from the object of research, namely McDonald's in Malang City, which has never been studied before. This research uses quantitative research methods. Data collection techniques were carried out by observation and document study. The data source used in this research is primary data. The population of this study is one of McDonald's drive thru facilities in Malang City. In this study, the sample selection used nonprobability sampling techniques. The data that has been collected is used as input in the Arena simulation to model the queuing system at McDonald's outlets. This research is limited to McDonald's outlets on MT Haryono street, no 115 Malang City, so the results only apply to McDonald's outlets in this area. This research is also limited to a certain period of time according to the research period of August 24, 2023 at 12:00-15:00. The results showed that the average queue duration in the system reached 7.2 minutes. Therefore, the recommendation from the researcher is to increase the number of cashiers, and increase the work efficiency of cashiers during lunch or evening hours to reduce the average queue time. Based on the simulation results, with the addition of one cashier, the average queue time can be reduced by 3.2 minutes, namely to 4 minutes.
Aerodynamic Study of Chord Length Effect in Low Speed Wind Turbine Using 6 DoF CFD Method Sabina Aisyah Susanto; Hangga Wicaksono; Hilmi Iman Firmansyah; Mukhammad Fakhruddin
JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE
Publisher : Widyagama University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31328/jsae.v6i2.4820

Abstract

The dependencies on fossil energy as a basic energy source has many negative impacts, therefore alternative energy is needed to overcome the problem, one of which is the alternative green energy wind turbines. However, wind turbines in Indonesia are difficult to implement because the wind speed in Indonesia is low, which is around 4-8 m/s, therefore it is necessary to do research to improve the ability of wind turbines applied in Indonesia. The analysis method using the 6 DoF CFD method and the experimental carried out using the wind tunnel. The blade used in this study is a custom combination airfoil with the chord lengths of 0.1 m, 0.15 m and 0.2 m. The results shows that, at wind speed of 8 m/s the blade with a chord length of 0.2 m has the greatest pressure of 47 Pa and rotational speed per minute of 76.1 rpm, this variation can be applied to low rpm generators. Whereas blades with a chord length of 0.1 m and a twist angle of 15o have a pressure of 47 Pa, and rotational speed of 97.24 rpm per minute, this variation can be applied to high rpm generators.

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