BIOMEJ

A Performance of Baffled Stirred Tank Reactor in Map Mineral Recovery

Luluk Edahwati — 2024-05-31

In the agricultural and wastewater treatment industries, the formation of Magnesium Ammonium Phosphate (MAP), also known as struvite, is an important process to utilize organic waste and produce value-added phosphate fertilizers. In this context, the use of a stirred tank reactor equipped with baffles is a major concern. This study aims to evaluate the performance of a stirred tank reactor with baffles in the recovery of MAP. Analysis of the experimental results shows that the use of baffles has a significant impact on process efficiency and the quality of the MAP product produced. This study provides a deeper understanding of the role of baffles in maintaining the flow pattern and mixing of raw materials in the reactor tank, thus making an important contribution to the development of more efficient and environmentally friendly phosphate fertilizer manufacturing technology. best phosphate obtained 27%, ph 10, temperature 30oC and molar ratio 1:1:2

Keywords: molar ratio, pH, precipitation, RTB, temperature, struvite

Coeficient of Performace Refrigerator Single Peltier with Waterblock Cooling

Ferdi Kurniawan — 2024-05-31

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

Reza Mardiansah suares — 2024-05-31

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.

Cooling Machines and Coefficient of Performance Calculations in Refrigeration Systems

Puspa Dinda Safitri — 2024-05-31

A cooling machine is an energy conversion machine that is used to transfer heat from a high temperature hot reservoir to a higher temperature hot reservoir by adding work from outside. In clear terms, a cooling machine is equipment used in the process of cooling a material (fluid) so that it reaches the desired temperature and humidity, by absorbing heat from the material (fluid) that will be conditioned, or in other words absorbing heat (heat) from a cold reservoir. and given to the hot reservoir. The method used in this experiment is a quantitative method where we collect data and then process the data to get the Coefficient of Performance (COP) value. the average temperature in the 5th minute was 24.7 ˚C, in the 10th minute it was 22.34 ˚C, in the 15th minute it was 21.66 ˚C, in the 20th minute it was 21.42 ˚C, at the 25th minute it was 21.32 ˚C, and at the 30th minute it was 21.2 ˚C. COPmax data above the 5th minute to the 10th minute there is a temperature decrease of 5.74%, where the temperature decrease is the highest temperature speed decrease compared to other minutes because the series of tools working in the first 5 minutes has a temperature decrease speed of the minute temperature. 5th minute of 24.7 ˚C towards the 10th minute average temperature of 22.34 ˚C. Meanwhile, the decrease in temperature from the 10th minute to the 15th minute was 2.95%. From the 15th minute to the 20th minute temperature, there was a decrease of 2.82%. For the temperature from the 20th minute to the 25th minute, the temperature decreased by 2.77%. Then from the 25th minute to the 30th minute, the temperature decreased by 2.71%. COPactual data calculations also showed a decrease where in the 5th minute it was 0.75%, in the 10th minute 0.33%, in the 15th minute 0.09%, in the 20th minute 0.03%, while in the 25th and 30th minutes the temperature starts constant with a decrease of 0.01%

Miniature Design of 3D Printed Piston Cup Using PLA Filament Material in Manufactoring Process

G. A. PUTERO — 2024-05-31

The manufacturing process has evolved throughout the years, with the current existence of 3D printing methods revolutionizing the industry. In the world of manufacturing, 3D printing is essential for producing unique products through a computerized system that synchronizes with many parameters of the intended 3D printed product. The precision of the systems used in 3D printing eases the manufacturing process by displaying parameters of a product that can be thoroughly analyzed. Furthermore, the 3D printing computerized system is effective, energy-efficient, and reliable due to not having direct human involvement in the manufacturing process, thus reducing the percentage of human errors. CAD designs are used for 3D printing and can produce highly accurate 3D printed objects. Mechanical components, small objects, and CAD-accurate designs can easily be achieved through 3D printing. Additionally, 3D printing allows for the creation of miniatures with highly accurate reproductions, which is particularly valuable in industries such as aerospace, medical devices, and consumer electronics. These miniature creations can be manufactured with intricate details that were previously difficult or impossible to achieve with traditional methods. The capability to produce these detailed miniatures has opened new avenues for innovation and customization in manufacturing. Due to the many advantages and the high level of precision offered by 3D printing, many researchers are driven to continuously improve the technology. Advances in materials, printing speed, and resolution are continually being explored to expand the applications of 3D printing in various sectors. The potential for producing complex geometries and custom components on demand makes 3D printing a pivotal technology in the future of manufacturing.

Temperature and Coefficient of Performance Test for Cooling Machine

Wahyu Aditya Sp — 2024-05-31

A cooling machine is a mechanism in the form of a cycle that takes energy (thermal) from a low temperature area and discharges it to a high temperature area (environment), so that the cooling load greatly influences the performance of the cooling machine. The greater the cooling load being cooled, the greater the cooling engine power will be required. Likewise, the smaller the cooling load, the smaller the cooling engine power required. The method used in this experiment is a quantitative method where we collect data and then process the data to get the Coefficient of Performance (COP) value. Based on the observations from the data collection results, it was found that in the 5th minute to the 30th minute there was a decrease in temperature, where the room temperature in the cooling machine was initially 24°C and the temperature decrease began to occur in the measurement at the 5th minute, amounting to 20.5° C, at the 10th minute it was 20.42°C, at the 15th minute it was 19.04°C, at the 20th minute it was 18.06°C, at the 25th minute it was 17.94°C, and at the 30th minute it was 17.82°C. From the actual COP data, in minutes 5 to 10 there was a decrease in temperature of 0.46%, where this percentage shows that there has not been a significant decrease in temperature, where a fairly high decrease occurred in the 15th to 20 minutes, where the percentages are consecutive. -also shows 7.95% and 5.64%. From the 25th to the 30th minute, the rate of decline began to remain constant again with a percentage of only 0.69%.

Peltier System Performance Analysis on Portable Refrigeration Machines: 30 Minute Experimental Case Study

S Chalimah — 2024-05-31

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.