R.E.M. (Rekayasa Energi Manufaktur) Jurnal
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154 research outputs found
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Effect of Vacuum on Evaporation of Seawater: Pengaruh Vakum Pada Penguapan Air Laut
No full textWater has become a vital necessity for every living organism to survive, leading to a threefold increase in global freshwater usage over the past 50 years. However, only 2.8% of the Earth's surface water is freshwater, while the rest is seawater. Therefore, seawater is processed into clean freshwater through desalination methods to make it consumable for the public. The desalination process involves two stages: evaporation and condensation aided by heat energy from a heater plate and a vacuum system. The use of vacuum in the desalination device aims to accelerate evaporation. In this study, three vacuum pressure variables were tested, namely no vacuum, 1 inHg vacuum pressure, and 2 inHg vacuum pressure. Data will be collected every 5 minutes for a total duration of 30 minutes for each variable. The research findings indicate that desalination using a vacuum system significantly affects the evaporation rate and the amount of freshwater obtained from the condensation process
Design of a PLC Based Temperature Controlled System
Full text linkTemperature control plays a critical role in various industrial applications, ensuring optimal process efficiency, product quality, and output. The programmable logic controller (PLC) has emerged as a versatile tool for implementing temperature control systems due to its advanced capabilities in computer control, communication, and automation. This work presents an approach for designing a temperature control systems using Programmable logic controller (PLC). The system employs thermostats, which is a form of temperature sensor to detect and convert temperature values into voltage signals, which are then processed by the PLC through ladder algorithms. The temperature status of the thermostats is used to switch OFF or ON electric heaters in a bid to reduce or increase the temperature of a system. The PLC technology enables continuous monitoring and control of temperature, ensuring precise regulation in industrial settings such as material processing, boiler heating, and kiln operations. Additionally, the paper highlights the advantages of PLC-based temperature control systems, including high efficiency, stability, precision, and remote monitoring capabilities. The findings suggest that PLC-based temperature control systems offer promising solutions for achieving reliable and effective temperature management in diverse industrial environments
Effect of Size of Polyester Matrix Coconut Coir Powder on Bending Test and Scanning Electron Microscopy (SEM) Test: Pengaruh Ukuran Serbuk Sabut Kelapa Bermatrix Polyester Terhadap Uji Bending dan Uji Scanning Electron Microscopy (SEM)
No full textCoconut plants are plants that are often found in all corners of the archipelago, so that natural products in the form of coconut in Indonesia are very abundant. Coconut fiber waste has the potential to be used as a reinforcement for new materials in composites. Coconut coir contains fiber which is an alternative natural fiber material in the manufacture of composites. The purpose of this study was to determine the effect of coco coir powder size on mechanical properties (bending test and SEM test) with coco coir powder size of 20, 40, 60 mesh with a volume fraction of 30% and following the ASTM D 790-03 composite material standard. SEM testing was carried out to determine differences in the surface conditions of the specimen due to fracture and the manufacturing process using the hand lay up method, SEM photos were used to analyze the morphology of the coconut powder composite with a polyester matrix. The results of the ASTM D 790-03 bending test resulted in the average bending strength values, namely 86,81 MPa resin specimens, 49,06 MPa 20 mesh specimens, 48,42 Mpa 40 mesh specimens, 45,44 Mpa 60 mesh specimens. The results of the SEM photo show that the powder is not completely bonded, so there are still voids and cracks in the empty matrix area, this can be caused by air trapping in the composite during molding
The Effect of Closed Wheels on Efficiency and Losses: Pengaruh Kincir Tertutup Terhadap Efisiensi dan Rugi-rugi
No full textWaterwheel is a component in a Micro Hydro Power Plant (PLTMH) which obtains energy from flowing water which has a height and speed. The amount of energy converted by the water wheel depends on the shape of the blade and the installation position, but the losses due to wasted water are still large. Therefore this study proposes a closed water wheel to reduce losses. This research uses two condition fo water wheel: open wheel and closed wheel. This research uses one mill which applied into two conditions. The waterwheel is made using Polylactid Acid (PLA)and tested using 2 inch pipe lines and flow rates of 10, 12, 14, 16, 18, 20 m3/hour. The efficiency of a closed water wheel is higher than that of an open wheel at all discharge rates. The highest efficiency for a closed wheel is 54.54% and for an open wheel is 52.25% at a discharge of 10 m3/hour with a loss ratio of 0.078 for an open wheel and 0.065 for a closed wheel which shows that the losses in the water wheel are reduced
The Analysis of the Effect of Bore Up Variation on Engine Performance
No full textThe purpose of this study was to determine the power, torque and fuel consumption of a Kawasaki Athlete motorcycle engine with a standard engine comparison, bore up of 0.50 mm, bore up of 1.00 mm, and bore up of 1.50 mm. The testing process uses a dynotes engine. With Pertamax fuel type. From the results of research that has been done, the performance has increased compared to the performance on a standard engine. The highest power is found in the 1.50 mm bore up variation of 10,2 Hp, the lowest power is found in the standard engine of 3,5 Hp. The highest torque is found in the 1.50 mm bore up variation of 10,31 N.m, the lowest torque is found in the standard engine of 3,40 N.m. For fuel consumption in each variation of the bore up has increased.
 
Using the MPX5500DP Sensor for Monitoring Microcontroller-Based HVAC Systems and IOT: Penggunaan Sensor MPX5500DP Untuk Monitoring Sistem HVAC Berbasis Mikrokontroler dan IOT
No full textMPX5500DP is a sensor designed to measure how much air pressure is traveling in a channel or piping system. The MPX5500DP sensor has an analog output value that can be converted into a digital signal to display data on how much air pressure is being generated. By utilizing the MPX5500DP sensor the purpose of this study is to measure air pressure in HVAC systems with Micro SD data storage and IOT (Internet Of Things) based Web Browsers. The method used in implementing the MPX5500DP sensor is, selecting materials, making tools, installing sensors and testing. The test results obtained from Micro SD storage are the average air pressure value of 15.76 kPa. The IOT test produced an average air pressure of 15.67 kPa. At the time of testing, there were problems where data transmission was very slow so that for 30 minutes the test only received 14 air pressure data that were read on the Web Browser, namely ThingSpeak. However, the IOT test on an air pressure gauge using the MPX 5500DP sensor was successful. The success of the IOT system in monitoring HVAC air pressure can assist in monitoring the HVAC system in multi-storey buildings
A Mapping Research on Cofiring from 1979 - 2022: Bibliometric Analysis
No full textThis study aims to investigate cofiring-themed articles through Bibliometric analysis using Biblioshiny. The metadata comes from the Scopus database, obtained using the keyword "cofiring". Nine hundred twenty-nine documents were obtained over 44 years (1979 – 2022). The study results show that the USA and China are hosts for cofiring researchers. The most relevant author and affiliate is from China, namely Longtu Li from Tsinghua University. The USA is the largest reference country for cofiring research. Cofiring research trends are divided into two clusters: the energy and power generation research cluster and the chemistry and ceramic materials research cluster. In energy and power generation research, three research themes relevant to current and future conditions are related to coal, biomass, and emission. The results of this study provide a comprehensive picture to academics in the fields of energy, power generation, chemistry, and materials science
Potential of Nano Hidroxyapatite in Dental Implants: Potensi Hidroksiapatit Nano pada Dental Implan
No full textHidroksiapatit {Ca10 [PO4]6[OH]2 } adalah kristal kalsium fospat yang terdapat pada matriks ekstraseluler jaringan tulang dan disintesis sebagai material pelapis implan khususnya Titanium. Material sintetik hidroksiapatit ini bersifat osteokonduktif yang dapat menstimulasi pembentukan jaringan baru pada mekanisme perbaikan tulang. Paduan Ttanium digunakan sebagai implan dan kawat gigi dalam kedokteran gigi karena memiliki sifat biokompabilitas yang baik. Ketika Titanium ditanamkan dalam tulang, jaringan sekitar akan bereaksi dan kekuatan ikatan tulang besar. Pemasangan implan gigi berbahan dasar Titanium mengaktivasi sistem imun yang menimbulkan reaksi antara host dan hidroksiapatit. Hidroksiapatit didesain dalam bentuk komposit dan polimer yang terdiri dari bahan organik dan inorganik serta kitosan sehingga hidroksiapatit tidak beracun dan tidak carcinogen. Untuk membuktikan hal tersebut peneliti membahas tentang Potensi Hidroksiapatit Nano Pada Dental Implan yang bertujuan untuk mengetahui komposisi kimia larutan dalam air ludah buatan setelah perendaman dengan menggunakan XRF (X-Ray Flourescences). Hasilnya didapat unsur tertinggi Mg sebesar 55,850 % dan unsur terendah Ti sebesar 0,035 %. Hal ini menunjukkan tidak terdapat unsur yang membahayakan tubuh
Implementation of the Quality Function Deployment (QFD) Method to Redesign a Walker for the Elderly: Implementasi Metode Quality Function Deployment (QFD) Guna Mendesain Ulang Walker Untuk Lansia
No full textThe walker is a very light and easy to move, waist-high, walker made of metal tubing and this tools is equipped with two algae that function as a place for its use to hold on and is equipped with four sturdy legs as a support. This study aims to obtain an ergonomic walker design and provide a level of satisfaction to customers. To redesign the walker, the Quality Fuction Deployment (QFD) method is used because it can be used for product development of walker design, meeting customer needs and desires.The result obtained in this study are the redesign of the walker to increase customer satisfaction by using the quality function deployment (QFD) method with four phases which are implemented into the House Of Quality (HOQ). The result of the walker product design have a value of normalized raw weight above 10% consisting of 16 attributes, namely has features as a seat 7,897%, the product has a simple, comfortable and foldable shape 7,280%, the product is comfortable to sit and lean on 7,573%, speed in customer service for repair 7,776%, the resulting product is a product with high quality 7,806%, the resulting product has a positive impression in terms of design and attached accessories 7,503%, the product has a technical age of approximately 10 year 7,513%. This is because this attribute is very important, based on the desired characteristics of walker user from a product
Characteristics of Waste Briquettes Hazelnut Shells with Glutinous Rice Adhesive: Karakteristik Briket Limbah Cangkang Kemiri dengan Perekat Beras Ketan
No full textThe energy crisis is increasingly felt starting from the scarcity of petroleum and gas fuels plus the increasingly expensive price makes it necessary to make efforts to obtain alternative renewable energy. One of the biomass materials that can be used as briquettes is hazelnut shells because in some observations in the field hazelnut shells tend to be discarded after taking the meat. The purpose of this study was to determine the differences in the characteristics of briquettes produced such as moisture content, calorific value, ash content influenced by the type of adhesive derived from glutinous rice so as to obtain the ideal formulation for making briquettes from hazelnut shells. This study used a complete randomised design (CRD) with variations in glutinous rice flour concentration of 20%, 30%, and 40%. The results showed that the concentration of the adhesive used was not significantly different from the value of water content, ash content and calorific value produced. The best quality briquettes were at 40% adhesive percentage, with a calorific value of 5321 cal/gr, 7.2% moisture content, and 5.1% ash content. Pecan shell briquettes with rice flour adhesive are in accordance with the Indonesian national standard (SNI) both from the value of water content, ash content and calorific value