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Energy, Materials and Product design
Published by Universitas Mataram
ISSN : 29646987     EISSN : 29646987     DOI : https://doi.org/10.29303/empd.v3i2
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering
Energy, Materials and Product Design is an open-access journal and published by the Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, Mataram, West Nusa Tenggara, Indonesia. Articles that have been approved and published in journals can be accessed by everyone at https://journal.unram.ac.id/index.php/empd/index. Energy, Materials and Product Design is a forum for publishing research results, case studies, and reviews related to mechanical engineering, such as energy, materials, product design, and ergonomics, which can influence other engineering fields. The scope of this journal is the field of mechanical engineering, including research or case studies related to heat exchangers, energy conversion including solar, wind, marine, biomass, heat storage, materials and components including manufacturing and metallurgy, electric vehicles or their components, as well as Ergonomics applications in tool and work station design. Articles can be written in Indonesian and English according to the Energy, Materials and Product Design journal guidelines.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 81 Documents
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PENGARUH VARIASI LETAK SIRIP BERONGGA PADA ALAT DISTILASI SURYA TERHADAP HASIL AIR TAWAR Mirmanto, M.; Sayoga, I Made Adi; Guna, Patar Dayu
Energy, Materials and Product Design Vol. 1 No. 1 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

For humans, clean water is a basic need in life. All life activities require water such as for bathing, cooking, washing and drinking. As time goes by and the world's population increases, the supply of clean water is decreasing. Some areas in the southern coast of Java, West Nusa Tenggara and East Nusa Tenggara often experience difficulties in obtaining clean water which is repeated every dry season arrives. The purpose of this study was to determine the effect of variations in the location of the hollow fins on the amount of fresh water produced. The data generated is the quantity of fresh water, the intensity of the sun, the speed of the wind around the distillation apparatus, the temperature of the water in the distillation apparatus. Varied are absorbers with flat plates, sleeping fins and standing fins. The research results show that standing fin absorbers produce the fresh water. On the first day, the mass of fresh water was 1.092 kg. On the second day, the fresh water obtained was 1.045 kg and on the third day, the fresh water obtained was 0.798 kg.
ANALISA KELAYAKAN BEJANA BERTEKANAN TIPE VERTIKAL DENGAN MENGGUNAKAN SIMULASI AUTODESK INVENTOR Yudhyadi, I G.N.K.; Rachmanto, Tri; Suartika, I Made; Wijana, Made; Fahrurrozi
Energy, Materials and Product Design Vol. 1 No. 1 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

The minimum thickness of vertical type pressure vessel of column type distillation, must be planned in accordance with the recommended code of ASME (The American Society of Mechanical Engineering) VIII Div 1. Based on this code, the study aims to determine the feasibility of a pressure vessel that used by PT Pertamina (Persero). For this reason, and to be able to use this ASME code, various data was needed, especially the data sheets and some required data from the field. Based on the data that has been collected, it is then processed and was made a 3D modeling and was simulated using Autodesk Inventor software to test its feasibility. Based on the results of the study, the minimum thickness was obtained, namely head 13.66 mm, shell 13.69 mm, and skirt 3.47 mm, respectively. Taking into account the availability of materials on the market, namely SA-516 Grade 70, the recommended thickness of the head and shell sections was 14 and 5 mm, respectively. From the results of the safety analysis, it was found that at the stress of 0.217, 0.197, 0.196, and 0.195 MPa, the Von Mises stress that occurred ware 0.249; 0.226, 0.225 and 0.224 MPa. From these data, based on the distortion energy failure theory, the head and shell materials which have yield strength of 260 MPa can be categorized as very safe because it does not exceed the yield strength of the material used.
APLIKASI ERGONOMI BERDASARKAN DATA ANTROPOMETRI PEKERJA PADA DESAIN ALAT KERJA Bawa Susana, I Gede; Alit, Ida Bagus; Aryadi, I G.A.K. Chatur Adhi Wirya
Energy, Materials and Product Design Vol. 1 No. 1 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

A review of the application of ergonomics to design work tools based on worker anthropometric data is carried out to provide information on its use in the production process, especially in micro, small and medium business. This is done because most people in Indonesia still use simple tools with unnatural work postures. Unnatural work postures such as bending, squatting, twisting, exposure to the sun, etc. Unnatural work postures cause musculoskeletal complaints and fatigue which have an impact on decreasing work efficiency. Of course, this causes a decrease in productivity and quality of life for workers. From the results of a review of several studies and literature, satisfactory results were found regarding the application of ergonomics in designing work tools according to worker anthropometric data. Application of anthropometric data for the design or redesign of a work tool based on the flow of 1) determining the body that is important in the design or redesign, 2) determining the user population, 3) calculating the percentile value for each predetermined body dimension, and 4) application to the design of the tool. Ergonomics application based on information related to human factors (strengths, weaknesses, or limitations) in designing work tools that are more effective, safe, comfortable, healthy, and efficient. An ergonomic work tool can be used effectively, comfortably, safely, healthily, efficiently, and sustainably. Ergonomics application as an alternative in overcoming the problem of musculoskeletal complaints and fatigue due to unnatural work postures. Ergonomics applications improve work safety and worker health so that work productivity increases.
SAMPUL VOL. 1 NO. 1 MEI 2022 empdadmin
Energy, Materials and Product Design Vol. 1 No. 1 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Sampul EMPD Volume 1 Nomor 1 Mei 2022
EVALUATION OF WASTE FACILITY NEEDS BASED ON THE EXISTING POSITION AND THE AMOUNT OF WASTE VOLUME IN JEMPONG BARU-MATARAM VILLAGE Wijana, Made; Suartika, I Made; Joniarta, I Wayan
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

An increase in the volume of waste if it is not accompanied by good management, will certainly have a bad impact on reducing the quality of the environment. In Jempong Baru village which has a population of 17,172 people, but currently only has 1 TPS located in the east Jempong neighborhood which has an area of 36 m3 with a capacity of 72 m3 and 1 damtruck with a capacity of 7 m3, which should be insufficient facilities, but in fact there is no garbage overflowing out of the TPS. For this reason, it is necessary to further study the current real condition (existing position) compared to the condition if all villages dispose of waste at the TPS in the environment of the research site (alternative position), in terms of the size of the volume of waste and the number of minimal waste facilities needed. The result of this study is that a dumptruck with a capacity of 7 m3 is able to transport waste from the TPS to the landfill, which is as much as 3 times / day (3 irritations). The total amount of waste generated in Jempong Baru Village in the existing position is 28.97 m3 / day and in the alternative position of 121.47 m3 / day. In the existing position, 1 TPS with a capacity of 72 m3 and 1 dumptruck with a capacity of 21m3 / day are sufficient. Meanwhile, in the alternative position, the facilities needed to handle the volume of waste as much as 121.47 m3 / day are at least 1 TPS and 6 dumptrucks
EFEK WAKTU TAHAN SINTERING DAN KOMPOSISI BAHAN TERHADAP KEKERASAN DAN STRUKTUR MAKRO PRODUK METALURGI SERBUK Triadi, A.A. Alit; Fathony, M.D.; Pandiatmi, Pandri
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

The development of science and technology today is very rapid and develop in various sectors, that one is in engineering material sector, specifically composite material . One method of composite formation is powder metallurgy method. Powder metallurgy is a metalworking technology in which components are manufactured from metal powders. This study aims to determine the effect of holding time sintering and mixing composition on hardness and macro structure observations. The material used in this study was aluminum waste that came from the rest of the window cutting. The specimens were made using powder metallurgy method. In this study the variations used were the sintering holding time of 120 minutes, 180 minutes, 240 minutes, composition variations of 80% Al : 17% Sic : 3% Glass, 80% Al : 14% Sic : 6% Glass, 80% Al : 11 % Sic : 9% Glass, 80% Al : 8% Sic : 12% Glass. Some control variables are grain size 100 mesh, mixing 15 minutes, compacting 7 tons and sintering temperature 600oC. The results obtained are the highest hardness value is found in the specimen with a sintering temperature of 600oC with a sintering holding time of 240 minutes at a material composition of 80:17:03 which is 90.33 HRF. The macro structure observations showed that there was a smaller porosity in the specimens with high hardness values. The results of the overall mechanical properties test show that the variation of the sintering resistance time has an effect on the specimen which will give time for the formation of stronger bonds between particles. While the variation in the composition of the material with SiC reinforcement the more the percentage given, the greater the composite hardness.
THE EFFECT OF NICKEL ELECTROPLATING ON THE SURFACE HARDNESS OF LOW CARBON STEEL Salman; Wiranata, Ardi; Sinarep; Dwi Setyawan, Paryanto
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Electroplating on steel is basically done with the aim of protecting the steel surface from corrosion attack. However, it is necessary to know the quality surface hardness of steel that has undergone electroplating. This research is determining the electroplating time and the best anode and cathode distance to surface hardness in the nickel electroplating process on low carbon steel. The method was done by placing the specimen into a electrolyte solution. Then the hardness test was carried out on the specimen. The results shown that the ST-37 steel coating with nickel with a variation of the plating time of 12 minutes and the distance between the anode and cathode of 150mm,has highest hardness number of 246.7kg/mm2. By ANOVA analysis the coating time greatly affects the surface hardness.
ANALISIS PENERAPAN KONSEP ERGONOMI UNTUK MENDESAIN MESIN POTONG KULIT KERANG MUTIARA Joniarta, I Wayan; Wijana, Made; Chatur Adi W.A., I G.A.K.; Bawa Susana , I Gede; Suartika , I Made
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

The application of the concept of ergonomics is carried out on seashell craft work facilities because the work facilities used are not in accordance with the principles and norms of ergonomics feasibility. The research objective is the redesign of cutting machines and work chairs based on various kinds of information related to human factors which include designing tools and work facilities that are more effective, safe, comfortable, healthy, and efficient (ENASE). Some of the ergonomic parameters that are used as references include aspects of anthropometry, human physical performance, effectiveness-efficiency, work productivity, and the subjectivity of complaints of body pain as a result of inappropriate positions and workloads. In this study, 1 unit of circular model of shell cutting machine was designed and 1 unit of chair / seat. With anthropometric measurements of employees and through ergonomic calculations using the 5th percentile, the dimensions of the work table (cutting table) were obtained, the size of the table height was 87, 9 cm long table 110 cm and table width 64.3 cm. Then the dimensions of the chair are also obtained as follows: seat base height 32.7 cm Chair base length 70.6 cm Chair base width 32.1 cm chair back height 56.8 cm cm, seat back width 44.5 cm After applying the principles of ergonomics, based on the results of the Nordic Body Map questionnaire, it was found that the application of ergonomic principles to work tools for clam shell workers resulted in a 128% decrease in musculoskeletal complaints. In addition to this, it also resulted in a decrease in fatigue levels of 103%. . This shows that the application of ergonomic principles has a positive impact on employees
PENGARUH pH DAN PUTARAN PENGADUKAN PADA FERMENTASI MOLASE TERHADAP HASIL AKHIR PRODUKSI BIOETANOL Egamiati; Rachmanto, Tri; Mara, I Made
Energy, Materials and Product Design Vol. 1 No. 2 (2022): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

Until now, oil and gas are the main energy sources in the world. Indonesia is a country with high energy utilization. Energy sources in Indonesia still come from fossil fuels. Burning fossil fuels, such as oil and gas, can cause the greenhouse effect. Therefore we need an alternative energy (biofuel) that is not harmful to the ecosystem. One example of biofuel is bioethanol. This study used 2 variations, namely stirring rotation (800, 1000 and 1200 rpm) and fermentation pH (4, 4.5 and 5). So from the two variations, 9 kinds of treatment were obtained with 3 repetitions so that the total sample was 27. The purpose of this study was to determine the effect of stirring rotation (rpm) and pH of fermentation on the final yield of bioethanol production. The production of bioethanol is carried out by a fermentation process for 48 hours, then distilled to obtain bioethanol. The results of this study indicate that the variation of fermentation pH is the most dominant factor on the level of bioethanol produced, while for the volume of bioethanol produced the most dominant factor is the stirring rotation. The treatment that produced the highest volume of bioethanol was a stirring rotation of 1000 rpm and a fermentation pH of 4 with an average volume of 1234.3 mL and the highest alcohol content was obtained at a stirring rotation of 1000 Rpm and a fermentation pH of 5 with an average value of 81.3%.
EFISIENSI WAKTU FERMENTASI DAN VARIASI BRIX TERHADAP HASIL AKHIR KADAR DAN VOLUME BIOETANOL PADA LIMBAH GULA (MOLASSES): EFFICIENCY OF FERMENTATION TIME AND BRIX VARIATION ON FINAL RESULTS AND VOLUME OF BIOETHANOL IN WASTE SUGAR (MOLASSES) Septiawan, Rizki; Rachmanto, Tri; Nurpatria
Energy, Materials and Product Design Vol. 3 No. 2 (2024): Energy, Materials and Product Design
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Mataram

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Abstract

ABSTRACT The use of fossil fuels in everyday life is increasing. Fossil fuels that come from elements of living things that have been buried for thousands or even millions of years are non-renewable or non-renewable, so the more use of fossil fuels the longer the time will run out. Therefore, bioethanol can act as a substitute or alternative energy to reduce the use of fossil fuels. Bioethanol is a liquid resulting from sugar fermentation from a carbohydrate source (cellulose) using microbes. The purpose of this study was to determine the efficiency of fermentation time on the final yield of bioethanol content and volume from bagasse (molasses) using various Brix values ​​of 14%, 15%, and 16% and the fermentation time used was 36 hours, 48 ​​hours, and 60 hours. From the variation of Brix value and fermentation time, 9 kinds of treatment were obtained with 3 repetitions so that the total sample was 27. The results of this study indicate that the fermentation time factor is the dominant factor in determining the volume of alcohol, and the Brix factor is the dominant factor in determining the concentration. The most optimal treatment to produce the highest volume of alcohol was the 14% Brix variation with a 36-hour fermentation time variation with an average bioethanol volume of 1145.3 mL, and the most optimal treatment to produce high alcohol content was 16% Brix variation with an average the moderate alcohol content is 84%.   Keywords: Bioethanol, Molasses, Brix, Time efficiency, Fuel

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