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Journal : Biomedical and Mechanical Engineering Journal

Mini Factory Laboratory from Technology Reverse Engineering Ballet Reactors in Struvite Formation Luluk Edahwati; Sutiyono; Wahyu Dwi Lestari Edahwati; Radissa Dzaky Issafira; Wiliandi Saputro; Ahmad Khairul Faizin; Ndaru Adyono; Tria Puspa Sari
BIOMEJ Vol. 1 No. 2 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Reverse Engineering (RE) can be interpreted as procedures and processes in dismantling an object to find out the materials, working methods, or technology used so that the object can function properly. Design activities using the reverse engineering concept make it easier for students to understand product specifications, product advantages and disadvantages, product production processes and production cost estimates before designing new products. The laboratory is one place that can be used to carry out the reverse engineering process. The bulkhead reactor is an alternative to the stirred tank reactor with the aim that the resulting product is maximized both in terms of quantity and morphology or shape of the material. The benefit of disassembling this product is as a first step in understanding the concept of reverse engineering in the task of designing machines or tools. From the results of the study, it was found that the formation of struvite occurred at pH 9 using an air flow rate of 1 l/minute.
Non-Premixed Combustion Simulation with Variation of Swirl Burner Slope using Turbulence Modeling K-ɛ Radissa Dzaky Issafira; Widya Wijayanti; Luluk Edahwati; Wahyu Dwi Lestari Edahwati; Wiliandi Saputro; Ahmad Khairul Faizin; Ndaru Adyono; Tria Puspa Sari
BIOMEJ Vol. 1 No. 2 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Combustion is a very complex matter. Therefore, we need to know the phenomenon that occur in combustion apart from the temperature distribution. This research uses quasi-research. The background in using quasi-experimental is because it has advantages in data collection. Moreover, the phenomena that occur in more detailed research by means of a numerical approach could also be observed. This research was conducted with an approach (simulation) of diffusion combustion using methane (CH4) fuel and air containing 29% oxygen (O2), 71% nitrogen (N2) and the addition of swirl in the air ducts. k-ɛ turbulence modeling was aaplied in this somulation. This variation of the fuel velocities are 3 m/s, 5 m/s, 7 m/s, where the air velocity was varied for 3 m/s, 5 m/s, 7m/s. In this simulation, room pressure of 1 atm was applied for the surrounding. The results showed that, the greater the angle of inclination of the swirl burner, the shorter the flame. And on the variation of fuel velocity, we get the result that the higher fuel velocity, increase fire height; however, the temperature of the fire height will decrease.
Manufacturing Acetabular Liner UHMWPE using CNC Milling Wahyu Dwi Lestari Edahwati; Luluk Edahwati; Radissa Dzaky Issafira; Wiliandi Saputro; Ahmad Khairul Faizin; Ndaru Adyono; Tria Puspa Sari
BIOMEJ Vol. 1 No. 2 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Ultra High Molecular Weight Polyethylene (UHMWPE) is a biomedical polymer that is useful in the orthopedic field as a bearing component in artificial hip joints. In general, these polymers pair up and rub against each other with metallic biomaterials, namely 316L stainless steel, cobalt chromium (CoCr) and titanium, which can cause material wear problems. One way to increase the wear resistance of UHMWPE is through the manufacturing process. The purpose of this research is to manufacture acetabular liner products using a CNC milling machine to obtain high surface quality and dimensional accuracy. The CNC milling machine used is the type of YCM 1020 EV 20. The manufactured specimen is then measured for roughness and dimensional accuracy. Based on the measurement results, it is found that the acetabular liner specimens from the CNC milling process are still in accordance with the standard ASTM standard (F 2033-12).
Availability of Palm Oil Biodiesel in Indonesia and Its Effect on Diesel Engine: A Review Wiliandi Saputro; Wahyu Dwi Lestari Edahwati; Luluk Edahwati; Radissa Dzaky Issafira; Ahmad Khairul Faizin; Ndaru Adyono; Tria Puspa Sari
BIOMEJ Vol. 1 No. 2 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Palm oil is one of the base ingredients that can be used in making of biodiesel which is an alternative fuel to replace diesel fuel. The ability of palm oil as biodiesel should be balanced with the quantity of palm oil as well as the level of biodiesel production capability. In this paper, authors try to analyze about palm oil as biodiesel starting from number of palm plantations up to the level of biodiesel production capability from palm oil. The analysis conducted in the first part of this paper can be used as a reference that shows the level of availability of the palm oil which can be processed into biodiesel as an alternative fuel in the future. In the next part, the authors tried to analyze the impact of biodiesel made from palm oil starting from engine performance, exhaust gas emissions, rate of wear, quality of lubricant, and deposit formed. It was is done in order to find out the advantages and disadvantages that occur from biodiesel so that it can be used as a reference or consideration in the use of biodiesel-fueled palm oil.
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.
Coefficient Analysis of Shell and Tube Type Heat Exchangers Hafizh, Firmansyah; Suares, Reza Mardiansah; Ikhsanudin, Zaky; Safitri, Puspa Dinda; Ghozali, Achmad Imam; DwiYanto, Agus; Firmansah, Achmad Robi; Rujianto, Andi Azrial Akbar; Saputro, Wiliandi; Issafira, Radissa Dzaky
BIOMEJ Vol. 4 No. 2 (2024): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v4i2.133

Abstract

Heat exchanger is a device used to transfer heat between two fluid systems at different temperatures. In this research, the heat exchanger used is in the form of a shell and tube which studies the mechanism of heat transfer between hot water and cold water both in contra flow. The purpose of this research is to analyze the relationship of heat transfer coefficient with changes in flow regime in shell and tube contra flow heat exchanger. This research was carried out by measuring the inlet and outlet water temperatures for the counter flow configuration, then analyzing the effectiveness calculation using the LMTD method. As a result, the inlet and outlet water temperature values for the counter flow configuration are obtained, then the effectiveness of the heat exchanger is assessed using the LMTD formula where the effectiveness of the heat exchanger for counter flow. The purpose of the research is to understand the heat exchanger system and analyze the performance of the shell and tube heat exchanger.