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Radissa Dzaky Issafira
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Department of Mechanical Engineering, Faculty of Engineering, Universitas Pembangunan Nasional Veteran Jawa Timur 1st floor Giri Reka Building, East Java, Indonesia Jl. Raya Rungkut Madya, Gunung Anyar Surabaya Jawa Timur 60294 Indonesia
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Biomedical and Mechanical Engineering Journal
Published by Universitas Pembangunan Nasional Veteran Jawa Timur
ISSN : -     EISSN : 27761983     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The Biomej Journal is published by the Mechanical Engineering Study Program, Faculty of Engineering, East Java "Veteran" University, Surabaya-Indonesia. Biomej is an open-access peer review journal that mediates the dissemination of academics, researchers, and practitioners in the field of mechanical engineering and accepts journal publications from all over Indonesia. Biomej aims to provide a forum for national and international academics, researchers and mechanical engineering practitioners to publish original articles. All accepted articles will be published and will be freely available to all readers with wide visibility. The scope of the Biomej Journal is including widely topics in engineering such as: 1. Biomedical engineering 2. Tribology 3. Modelling 4. Finite ELement Method 5. Material Science 6. Mechatronics 7. Structural and Machiine Design 8. Stress Analysis 9. Renewable Energy 10. Structural Mechanics 11. Thermodynamics 12. Material Processing 13. Fatigue and Air Conditioning 14. Heat Transfer 15. Manufacturing 16. Fluid Mechanics 17. Combustion 18. Aeodynamics 19. Environmental Protection 20. Acoustic and Noise 21. Energy Studies 22. Refrigerationand Air 23. Conditioning 24. Engines and Turbines 25. Thermodynamics 26. Earth Science 27. Natural Hazards 28. Food Technology Processing
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 90 Documents
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Analysis of pH Regulation on the Ca/P Ratio of Green Mussel Shell Hydroxyapatite using the Sol-Gel Method Edahwati, Luluk; Sutiyono; Suprihatin; Titi Susilowati; Sri Muljani
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.83

Abstract

Kandungan kalsium karbonat dari cangkang kerang hijau dapat dimanfaatkan sebagai salah satu material. Hidroksiapatit merupakan mineral utama yang menyusun tulang dan gigi sehingga memiliki kemiripan dengan bagian mineral pada tulang. Penelitian dilakukan untuk Konsentrasi reagen asam fosfat yang digunakan dan pH reaksi pada perolehan rasio Ca/P dari Hidroksiapatit yang didapatkan melalui proses sintesis dengan menggunakan metode sol-gel. Proses presipitasi calsium carbonat dilakukan dengan menambahkan air sebanyak 50 ml kedalam larutan H3PO4 dengan konsentrasi 1M kemudian diaduk selama 3 jam menggunakan magnetic stirrer dengan kecepatan pengadukan sebesar 300 rpm, pH dijaga 8 – 12 ( variabel ) menggunakan bantuan NaOH. Selanjutnya larutan dilakukan penuaan (waktu aging) pada suhu kamar selama 20 jam sampai terbentuk gel. Gel yang telah terbentuk disaring menggunakan kertas saring watman. Selanjutnya gel dipanaskan dalam oven dengan suhu 105 selama 2 jam. Serbuk yang dihasilkan kemudian difurnace pada temperatur 600oC selama kurang lebih 6 jam supaya membentuk serbuk kering Hidroksiapatit. Rasio Ca/P terbaik sebesar 1,6708 dengan penggunaan H3PO4 sebesar 1M serta pH sebesar 11.
Inventory Control Analysis Using Economic Order Quantity (EOQ) in the Pekalongan Batik Industry Winati, Famila Dwi; Indarwati, Titi
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.84

Abstract

One of the economic sectors that is able to provide a significant increase in Indonesia's economic growth is MSMEs, which operate in the creative industry sector. On the other hand, MSMEs are a business sector that is often faced with uncertainty. One of the batik MSMEs in Pekalongan was forced to face post-disruption effects such as a pandemic, which had an impact on decreasing demand and increasing supply. Therefore, strategies are needed to remain competitive in the market, one of which is inventory management. The EOQ model is used in this research to minimize raw material inventory costs by determining the economical order quantity (Q) in one of the Pekalongan batik industries. The results of this research provide a concrete reference for MSMEs to plan their supply of fabric raw materials, starting from determining order frequency, reorder points, and safety stock. The optimal order quantity for MSME raw materials is 10,189 meters, with an order frequency of 35 times in the planning horizon. The safety stock level that must be prepared is 3,988 meters, and the reorder point is 6,362 meters to meet demand during lead time. Through the proposed inventory planning, MSMEs can save inventory costs and allocate resources for other purposes.
Analysis of the Application of Occupational Safety and Health Signs as an Effort to Reduce Risks in Building Construction Projects Mega Cattleya Prameswari Annissaa Islami; Rizqi Novita Sari; Sinta Dewi
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.85

Abstract

The construction area is the area that has the most sources of danger. UPN "Veteran" East Java is currently constructing several buildings, such as the addition of lecture halls or the construction of laboratories. The density of the campus area with thousands of students around the construction project makes the risk of danger high. Several cases of students slipping and tripping in the construction area due to scattered building materials, making the application of safety signs need to be considered. This study aims to determine how necessary safety signs are for work safety on the UPN "Veteran" East Java construction project. Where the population used in this activity is students with a sample size of 30 people. The methods used are statistical methods of the ANOVA test, Ergonomic Checklist, and Questionnaire of understanding of safety signs. The results of data processing concluded that the application of OHS signs is needed, especially signs of danger of falling goods, tripping warnings, slipping warnings, and slippery floor warnings
Struvite Mineral Synthesis from Laundry Waste Water Sutiyono; Edahwati, Luluk; Indah Nur Fauziyah; Lusy Larasati A
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.87

Abstract

Struvite is a white crystal chemically known as magnesium ammonium phosphorus hexahydrate (MgNH4PO4.6H2O). This mineral has a hardness of 1.5 to 2 Mohs. Struvite is easily soluble under acidic conditions and slightly soluble under neutral and alkaline conditions. In industry, struvite is found in the crust of pipes through which hot fluids pass. Struvite is often used as fertilizer because of its phosphate content. The formation of struvite minerals (hereinafter MAP) from laundry waste water is carried out using an aeration tank. MAP solution is made by reacting laundry waste water with Phosphoric Acid (H3PO4) and Ammonium Hydroxide (NH4OH). The MAP ratio was set at 1:1:1 with a temperature of 20 - 40 oC and an air flow rate of 0.5 - 1.5 liters per minute. The best results were at a temperature of 25oC with an air flow rate of 1 (Liter / minute) with a magnesium content of 10% and phosphorus of 42%.
The Capstone Design of Solar Farm for Alternative Energy TP Sari; RB Anggoro; RA Raharjo; ST Umaroh
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.88

Abstract

The capstone design integrates advanced technologies to optimize energy capture, storage, and transmission, addressing key challenges in traditional solar farm configurations. The study delves into the conceptualization, engineering, and performance evaluation of the proposed solar farm, emphasizing its potential for enhanced efficiency and sustainability. Additionally, the article discusses the environmental impact and economic viability of the free space solar farm, highlighting its role in advancing the transition to a more sustainable and resilient energy infrastructure. The results of this design use polycrystal type solar panels with a panel length of 1995mm and a width of 990mm which will be installed on empty land that has been provided with a land area of 80m x 40m, 50 rows of solar panels are obtained and the total energy produced before being converted into KWP with a total of 50 rows of panels is obtained 325 WP and multiplied by the total existing panels, namely 36 solar panels, the result is 11,700 WP, then converted to KWP and the result is 585 KWP for 1 day. The findings contribute valuable insights to the field of renewable energy engineering, offering a comprehensive understanding of the practical application of free space for solar energy generation.
Design of Sensor-Based Semi-Automatic Car Wash System Prototype and it’s Gear Box Conveyor Calculation E. M. Saputra; R. M. Z. H. Putra; W. A. S. Putra; M. Miftakhurrohman; R. D. Issafira
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.89

Abstract

The rapid and widespread development of science and technology (IPTEK). Particularly in the automotive industry has encouraged the development of the automotive industry, especially in four-wheeled vehicles or also known as cars. Given the number of vehicles that are still quite a lot, maintenance, care and repair must be carried out for the smooth running of the car's work process so that the car's work process runs smoothly. One of them is the system of car washing. In the process of washing a car, the uses of human power (manual) still predominant. This automatic car wash system is the perfect solution to save time and effort. Based on this, a designed small-scale sensor based semi-automatic car wash miniature was made. Supporting components are needed so that the automatic car wash system can work according to the desired design, including Ultrasonic sensors, DC motors, dynamo motors, Water Pumps, 12V fans. The main objective of this simulation is the development of criteria to design and build a car wash of this type-high real way to solve the challenges of automation. The research results show that the proposed method is in process control not only increases productivity, speed, accuracy and safety, but also reduces the time and cost of washing dynamic vehicle models.
Comprehensive Analysis of Coefficient of Performance (COP) Calculation in Peltier Refrigeration Systems R. D. Issafira; W. Saputro
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.90

Abstract

This study delves into the intricate domain of Peltier refrigeration systems, focusing on the crucial parameter of Coefficient of Performance (COP) as a key metric for system efficiency. Peltier devices, known for their solid-state thermoelectric cooling capabilities, have gained prominence in various applications, including electronics cooling, medical devices, and space exploration. The research encompasses a comprehensive review of existing COP calculation methodologies, considering the unique characteristics and operational principles of Peltier modules. Various factors influencing COP in Pertier refrigeration, such as temperature differentials, electrical input power, and thermal resistances, are analysed in detail. Additionally, the impact of material properties, design considerations, and environmental conditions on COP is explored. Furthermore, the research addresses challenges and opportunities in optimizing COP for Pertier refrigeration, considering the trade-offs between efficiency, cost, and practical implementation. Insights from this study aim to contribute to the ongoing efforts in enhancing the sustainability and effectiveness of Peltier refrigeration technologies across various industries.
Coeficient of Performace Refrigerator Single Peltier with Waterblock Cooling Ferdi Kurniawan; Marselinus Angga Setyo Atmojo; Michael Dion Lisanto; Muhammad Afif Alhalim; Hanifah Qolbu Rizqullah; Alvin Muhammad; Rachmad Jagad Roychan; Radissa Dzaky Issafira; Wiliandi Saputro
BIOMEJ Vol. 4 No. 1 (2024): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v4i1.92

Abstract

Mesin pendingin (Refrigator) merupakan suatu rangkaian mesin yang mampu bekerja untuk menghasilkan suhu atau temperature dingin. Dalam sebuah pendingin, refrigeran dialirkan dalam proses-proses yang akan membentuk siklus kompresi uap standar. Praktikum kali ini akan membahas mengenai grafik penurunan suhu refrigerator serta COP yang dihasilkan baik maupun berdasarkan rancangan alat yang telah dibuat. Dimensi refrigerator yang digunakan adalah 33,5 cm x 24,5 cm x 30,5. Pendingin menggunakan peltier TEC-12706 dengan pendingin peltier menggunakan waterblock.Berdasarkan pengolahan data suhu yang didapatkan dilanjutkan dengan melakukan perhitungan menghasilkan terbesar 6,0870 dan terkecil 4,2381. dihasilkan terbesar 2,1812 dan terkecil 1,5926.
Cooling Machine Adapted Peltier Cooling Module TEC1-12706 to Understand Heat Transfer Application Mardiansah suares, Reza; Maulana, Ivan; Ikhsanudin, Zaky; Imam Ghozali, Achmad; DwiYanto, Agus; abyan H, Rakha; Robi F, Achmad; Setiawan Y, Mazadi; Radissa Dzaky Issafira; Wiliandi Saputro
BIOMEJ Vol. 4 No. 1 (2024): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v4i1.95

Abstract

This paper discusses the development of a simple refrigeration system that utilizes a PSU (Power Supply Unit), Peltier TEC1-12706 module, axial fan, and heatsink. This system is designed to provide an efficient solution for cooling limited spaces or electronic devices at an affordable cost. The PSU is used as the main electrical power source, while the Peltier module functions as the main cooling element that utilizes the thermoelectric effect. An axial fan is integrated to improve heat transfer, increase cooling efficiency, and maintain operational temperatures at desired levels. Heatsinks are used as an addition to the heat absorption and distribution process, ensuring optimal system performance. This research involves experimental testing to measure the system's ability to reduce temperatures and maintain operational stability. The experimental results show that data was obtained from the 5th minute to the 30th minute. The average temperature was 18.54˚C in the 5th minute, 16˚C in the 10th minute, 14.88˚C in the 15th minute, 14.88˚C in the 10th minute. in the 20th minute it was 14.34˚C, in the 25th minute it was 14˚C, and in the 30th minute it was 13.78˚C and obtained a maximum COP value of 0.702 and actual COP 0.212. This research contributes to the development of efficient and affordable cooling technology by utilizing components that are easy to access and apply.
Peltier System Performance Analysis on Portable Refrigeration Machines: 30 Minute Experimental Case Study S Chalimah; R Setyobudi; RB Anggoro; A Sadrina; CM Putri; MHB Satria; ES Buana; AR Rizqullah
BIOMEJ Vol. 4 No. 1 (2024): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v4i1.97

Abstract

This study investigates the performance of Peltier modules, commonly used in portable refrigeration, through the lens of Coefficient of Performance (COP). A portable cooler is constructed using a Styrofoam box, a Peltier module, a heatsink, and a fan. The experiment involves powering the system and recording temperatures on both the cold and hot sides at specific intervals over a 30-minute period.The collected temperature data is then utilized to calculate the COP, a metric that quantifies the system's efficiency by comparing the cooling effect (heat removed) to the electrical energy consumption. This analysis provides valuable insights into the effectiveness of Peltier technology in portable refrigeration applications.The 30-minute timeframe offers a focused case study, allowing for a controlled investigation of the system's performance under steady-state conditions. The study can be further expanded by exploring COP variations at different ambient temperatures, offering a more comprehensive understanding of the system's capabilities in diverse environments.This research contributes to the ongoing exploration of Peltier technology in portable cooling, providing valuable data for optimizing efficiency and design considerations in this growing sector.

Page 8 of 9 | Total Record : 90

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