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Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Published by Universitas Medan Area
ISSN : -     EISSN : 28304047     DOI : 10.31289
Core Subject : Engineering,
Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Ilmiah Teknik Mesin dan Industri (JITMI) focuses on publishing scientific research findings related to the field of Mechanical and Industrial Engineering. This article is published within the internal and external academic community of the Universitas Medan Area (UMA). The published articles are the results of research and critical, comprehensive scientific studies on important issues related to the aforementioned field of study. The journal has two publication periods, in May and November.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 7 Documents
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Search results for , issue "Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin " : 7 Documents clear
Penyelidikan Eksperimental Alat Pengisi Daya Menggunakan Termoelektrik Dengan Pemanfaatan Panas Knalpot Sepeda Motor Rizki Wiranata; Muhammad Idris
Jurnal Ilmiah Teknik Mesin & Industri (JITMI) Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitmi.v2i1.1950

Abstract

Thermoelectricity is a material that can convert heat energy into electrical energy. By installing a thermoelectric near the exhaust pipe, the heat emitted from the exhaust pipe will automatically be converted into electrical energy. This article discusses the testing of a power charging device that utilizes the heat from the vehicle's exhaust pipe, according to specific requirements. The process begins with the selection of materials and dimensions, followed by design, fabrication, assembly, and performance testing of the power charging device for mobile phones using the heat from the vehicle's exhaust pipe. The objective of this research is to create a device for charging mobile phones or power banks while analyzing the heat generated by the temperature changes. The methodology employed in this study includes experimental setup, device assembly, device testing, and device analysis. The results of the fabrication of the mobile phone charging device using rectangular copper specimens with dimensions of 80 mm in length, 40 mm in width, and 40 mm in height, along with four square-shaped Peltier modules measuring 40 mm x 40 mm x 4 mm each, indicate a voltage output of approximately ±1.5V per Peltier module. The analysis of the heat generated by the temperature changes during testing at 5000 rpm in an idle state resulted in a temperature difference (∆T) of 208.2 K. The voltage produced was 6.06 V, the current was 0.223 A, and the power was 1.35 watts. Testing the engine at 5000 rpm resulted in an electric current of 0.25 A and power output of 1.55 watts. The overall heat transfer rate was U = 23.915 W/℃, and the thermal resistance rate was ΣR = 20.433 oC/W.
Efisiensi Turbin Kincir Air Akrilik Undershot 8 Sudu 15o Rizky Tampubolon; Indra Hermawan; Muhammad Idris
Jurnal Ilmiah Teknik Mesin & Industri (JITMI) Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitmi.v2i1.2015

Abstract

Electricity is one of the vital energy sources that is highly demanded by society. However, there is still an imbalance in the availability of electricity in Indonesia, especially in remote or isolated areas that are difficult to reach by the national power grid (PLN). To address this issue, one of the solutions that can be employed is Micro Hydro Power Plant (PLTMH), which is a renewable power generation system. In PLTMH, water turbines are utilized as a medium to generate rotation through the force exerted by the flowing water from a certain height. The water head plays a significant role in the performance of the water turbine, where a higher waterfall and impact on the turbine blades result in faster rotation and greater energy production. This study presents the experimental results of an Undershot Water Turbine made of Acrylic material with 8 blades and a blade angle of 15°. The experiment employed a water volume of 58 liters and a water gate opening of 3 cm. The results showed that the water turbine generated a power of 0.41584 watts, while the power produced by the flowing water was 1.23186 watts. The efficiency of the water turbine in this experiment reached 33%. Based on this research, it can be concluded that the proper utilization of an Undershot Water Turbine made of Acrylic material with an appropriate number and angle of blades can yield significant power output. Moreover, the achieved efficiency level of 33% demonstrates that the water turbine can serve as an efficient alternative for renewable electricity generation.
Analisis Efektivitas Perpindahan Panas Kondensor pada Proses Destilasi Daun Serai Wangi Septa Fernando Karo Karo; Darianto Darianto; Muhammad Idris
Jurnal Ilmiah Teknik Mesin & Industri (JITMI) Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitmi.v2i1.1951

Abstract

The condenser is one of the main components in a system that condenses vapor into liquid. The performance of a condenser can be influenced by heat transfer rate, vacuum pressure, and effectiveness. The aim of this research is to determine the effectiveness value and variables that affect the performance of the condenser in the lemongrass distillation process, as well as to understand the influence of heat transfer rate on film condensation (condensate vapor mass). The research method used the Log Mean Temperature Difference (LMTD) and Effectiveness - Number of Transfer Unit (NTU) to calculate the effectiveness value and compared the condensate vapor mass with the mass flow rate of vapor to obtain film condensation. The research results showed an effectiveness value of 89% in the condenser, and the condensate vapor mass accounted for 36% of the biooil. The influencing variables were a capacity ratio of 0.0182840, a heat transfer rate of 186544.68 W, and an LMTD of 29.74°C. Therefore, it can be concluded that the condenser used in the lemongrass distillation process still performs well.
Penggunaan Metode Moodie Young Pada Keseimbangan Lintasan Produksi Bola Lampu Didit Teguh Prasetyo; Sutrisno Sutrisno; Ninny Siregar
Jurnal Ilmiah Teknik Mesin & Industri (JITMI) Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitmi.v2i1.2016

Abstract

The Use of Moodie Young Method in Balance of Light Bulb Production Line. Line production is a part of production activity which including set of working element works and working area. Several balance constraints on the production line are sometimes occurred in a company who runs in light bulb production, such as a bottleneck in the production process and accumulation of material at work stations due to the high idle times, also a gap in cycle time between the production times of each work station. The study employed the Moodie Young method by measuring three parts of balanced production line level, including Line Efficiency, Balance Delay, and Smoothness Index. The result pointed out that the actual production line values are Line Efficiency 43.69%, Balance Delay 56.30%, and Smoothness Index 703.64. The result also stated that there are improvement of the production line values by using Moodie Young method, which are values of Line Efficiency 76.46%, Balance Delay 23.53%, and Smoothness Index 279.39. To sum up, the high value of line efficiency and the low values of balance delay and smoothness index presents a good level of balanced the production line.
Pembuatan Mesin Internal Mikser Bijih Plastik Kapasitas 50 g/h Jepriadi Purba; Iswandi Iswandi; Bobby Umroh
Jurnal Ilmiah Teknik Mesin & Industri (JITMI) Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitmi.v2i1.1952

Abstract

This research aims to test and validate the performance of the IMBP Machine that has been created, ensuring that the machine can operate effectively and perform its components' functions as expected. Additionally, the objectives of this study include achieving the desired processing results of 50 grams per hour of plastic seeds and systematically developing the process of manufacturing the IMBP Machine, starting from the construction of the iron frame, gear housing, end plate, barrel, hopper, cover, packing, knife shaft, blades, binding shaft, and finishing process. The research methodology employed encompasses field observation, literature review, testing and measurement methods, as well as analytical methods. Field observation is utilized to observe and gather data from machines operating in the field. Literature review is conducted to obtain information related to the theory and practices of the IMBP Machine. Testing and measurement methods are employed to evaluate machine performance and collect data regarding the achieved processing outcomes. Furthermore, the analytical method is used to compare the obtained data with the desired specifications, thus validating whether the machine has achieved the intended targets. The research findings demonstrate that this machine successfully produces the IMBP Machine according to the desired specifications. It is proven to function effectively in processing plastic and carbon materials. With the results of this research, it is expected that this machine can contribute positively to plastic waste processing and carbon waste reduction processes.
Analisis Pengaruh Harga, Produk, Dan Kualitas Pelayanan Terhadap Kepuasan Konsumen Pada PT. Jalur Nugraha Ekakurir (JNE) Tebing Tinggi Dandy Prakoso; Yudi Daeng Polewangi; Healthy Aldriani Prasetyo
Jurnal Ilmiah Teknik Mesin & Industri (JITMI) Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitmi.v2i1.2008

Abstract

The study analyzed the effect of price, product, and service quality on customer satisfaction at PT. Jalur Nugraha Ekakurir (JNE) Tebing Tinggi. This research was a quantitative descriptive study with data analysis techniques used, namely multiple linear regression and hypothesis testing (t-test and f test). This research was conducted at PT. Jalur Nugraha Ekakurir (JNE) Tebing Tinggi. On Gen. Sudirman street No.397 Medan-Tebing Tinggi, it was held on 12 December 2020 to 12 February 2021. The data collection method used a questionnaire and documentation. The results of multiple linear regression analysis obtained Y=6.226+0.085X1+0.244X2+0.184X3+e. The results showed that the Price had no positive and significant effect on Consumer Satisfaction at PT. JNE Tebing Tinggi indicated by the value of t count (0.873) t table (1.984) meaning that the Price had no significant effect on Consumer Satisfaction, so H1 was rejected. The product had no positive and significant effect on Consumer Satisfaction as indicated by the t value (1.975) 1 table (1.984), meaning that the product had no significant effect on Consumer Satisfaction, so H2 was rejected. Service Quality had a positive and significant effect on Consumer Satisfaction as indicated by the value of t count (3.477) t table (1.984), meaning that Service Quality had a significant effect on Consumer Satisfaction, so H3 was accepted. Price, Product, and Service Quality together had a positive and significant effect on Consumer Satisfaction. This was indicated by the value of Fcount (13.559) Ftable (3.09) meaning that the variables of price, product, and service quality together had a positive and significant effect on Customer Satisfaction at PT. JNE Tebing Tinggi then H4 was accepted. The coefficient of determination (R square) was 0.298, which meant 29.8% of the Consumer Satisfaction variable could be explained by the three independent variables consisting of Price, Product, and Service Quality, while the remaining 70.2% of the Consumer Satisfaction variable was influenced by other variables not discussed in this research.
Rancang Bangun Cetakan Botol Ukuran 30 ml Model Blow Pada Mesin Injection Molding Martua Sangap Siagian; Dadan Ramdan; Bobby Umroh
Jurnal Ilmiah Teknik Mesin & Industri (JITMI) Vol 2, No 1 (2023): Jurnal Ilmiah Teknik Mesin & Industri (JITMI)
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jitmi.v2i1.2009

Abstract

At present, the need to use plastics and the advancement of manufacturing technology for the material itself drive people's demand for plastics, and the development of technology has further increased competition in all fields of industry. Therefore, the plastics industry needs to increase production in terms of quality and quantity. In this way, plastic can slowly replace iron and steel due to its good moldability and light weight. In this research, as a research method, we use quantitative methods by conducting surveys, data collection and field research related to the research theme. After the data is collected, the next step is the fabrication of the test equipment. From the mold fabrication results, the mold is in the shape of a 30 ml bottle with dimensions of 105 mm x 40 mm, inlet ø 6 mm, outlet 3 mm, and the mold is made of aluminum. This mold is called the 3 plate system and the mold consists of 3 main parts which are divided into 3 parts. Good and ideal molding results were obtained with HDPE (High Density Polyethylene) material with injection speed parameters of 8 rpm and temperature of 190°C.

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