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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Jurnal Teknik Mesin
Rozi Saferi, Rozi
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Automotive Engineering Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analysis of the Performance of Moisture Reduction Rate in a Horizontal Mill Type Coffee Dryer Using a Suction Blower Yanel, Karnova; Hendra, Surya; Saferi, Rozi; Sulaiman, Sulaiman
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 18 No. 1 (2024): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.18.1.38-43

Abstract

Coffee, originating in the 9th century Ethiopia and later expanding across North Africa and tropical regions globally, remains a crucial commodity. Indonesia, recognized for its robust coffee industry, ranks third worldwide in production, contributing 8% of the global supply. However, the drying process poses challenges to Indonesian farmers due to traditional methods and variable weather conditions. This research aims to evaluate a coffee dryer utilizing forced convection with a suction blower to optimize drying parameters for coffee beans. The study employs a horizontal mill dryer with a heated drum for drying experiments. Results demonstrate that the dryer effectively reduces the moisture content of post-harvest coffee cherries to 2%. In the initial test, 20 kg of coffee dried over 7.5 hours at 75℃ decreased from 61.66% to 5.3% moisture, while a subsequent test with 17 kg dried over 4 hours reduced from 36% to 2% moisture content. The findings conclude that the suction blower-equipped dryer meets Indonesian National Standards (SNI), achieving the requisite 12% moisture content for post-harvest coffee.
Design Development of Coffee Roaster with Quality Function Deployment Method Satria, Fajri Ilham; Saferi, Rozi; Yanto, Asmara
Jurnal Teknik Mesin Vol 14 No 1 (2024): Jurnal Teknik Mesin Vol.14 No.1 April 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2024.v14.i1.1-7

Abstract

This research aims to identify and determine the level of consumer needs regarding the coffee roaster and to compile a House of Quality (HOQ) to determine dominant design needs and priority technical characteristics of the machine. The benefit of this research is to be able to develop the coffee roaster and to maximize machine use and time efficiency in roasting coffee. The research method used is the Quality Function Deployment (QFD) method by conducting field surveys aimed at finding out the level of consumer needs by distributing questionnaires and looking for information about what the need to make it easier to roast coffee beans. The location of this research was carried out in several café or coffee shop in Padang City. Based on the column weight, it was found that the strongest priority in the technical response was the design aspect with a value weighting of 38.64, followed by the material criteria aspect with a value weighting of 66.1, then time and energy efficiency with values ​​weighting of 30.34 and 15 respectively.. The design for developing coffee roaster according to consumer needs lies in a more affordable price which makes the use of materials and sizes of horizontal sangria equipment cheaper compared to conventional coffee roasting equipment.
Mitigating Cone Chute Telescopic Failures in Clinker Distribution Through Abrasion-Resistant Design Improvements Jalil, Abdul; Saferi, Rozi
Jurnal Teknik Mesin Vol 14 No 2 (2024): Jurnal Teknik Mesin Vol.14 No.2 October 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2024.v14.i2.45-55

Abstract

The cement industry plays a crucial role in supporting infrastructure development, making the smooth distribution of raw materials such as clinker essential for production efficiency. PT Semen Padang, a subsidiary of Semen Indonesia Group, produces clinker as a key intermediate material in cement manufacturing. One of the critical components in clinker distribution is the shiploader, responsible for transferring clinker from silos to the ship’s hold. However, frequent damage to the Cone Chute Telescopic component disrupts operations, increasing downtime and maintenance costs. This study aims to identify the root causes of Cone Chute Telescopic failures, propose durable design improvements, and develop applicable repair methods. A quantitative approach was employed through field observations and experimental analysis, focusing on the impact of clinker’s abrasive properties, high temperatures, and operational factors on component wear. A key solution implemented was the application of ceramic coating and 3mm steel plate lining to enhance resistance against abrasion. The study also explored the effects of cooling clinker before loading, optimizing chute design to reduce localized wear, and improving material selection for enhanced durability. Results indicate that clinker’s abrasive nature and high temperature significantly accelerate wear, particularly when ceramic coatings detach, exposing the fiber-reinforced material underneath. Additionally, structural issues such as inadequate suspension mechanisms and sensor malfunctions contribute to operational inefficiencies. The implementation of protective steel lining demonstrated a reduction in wear rates, suggesting a viable solution for extending component lifespan. The findings contribute to improving clinker distribution efficiency at PT Semen Padang and provide insights for the broader cement industry in enhancing the reliability of shiploading systems. Future research should focus on advanced composite materials and alternative cooling techniques to further mitigate clinker-induced wear.
Stress Analysis of Elevator Chain Pin in PT. Semen Padang Yanel, Karnova; Akmal, Hamdani; Saferi, Rozi
Jurnal Teknik Mesin Vol 13 No 2 (2023): Jurnal Teknik Mesin Vol.13 No.2 October 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2023.v13.i2.42-48

Abstract

The chain pin on the elevator chain is the most important component in the chain in transmission system which function as an axle on the chain. Chain pin is the part that is in direct contact with the sprocket teeth. This analysis aims to determine the stress that occurs in the chain pin by calculating the stress and using the autodesk inventor software. Data collection is done by measuring the dimensions of the elevator chain, the calculating the chain pin analysis using equation according to theory and using autodesk inventor for better analysis result. The result of the stress analysis on the chain pin with a diameter of 23 mm are 16.93 MPa while the result of the analysis using autodesk inventor software are 1.43 MPa. So that the stress resulting from the two analysis does not exceed the maximum allowable stress of 568.78 MPa.
Design Development of Coffee Roaster with Quality Function Deployment Method Satria, Fajri Ilham; Saferi, Rozi; Yanto, Asmara
Jurnal Teknik Mesin Vol 14 No 1 (2024): Jurnal Teknik Mesin Vol.14 No.1 April 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2024.v14.i1.1-7

Abstract

This research aims to identify and determine the level of consumer needs regarding the coffee roaster and to compile a House of Quality (HOQ) to determine dominant design needs and priority technical characteristics of the machine. The benefit of this research is to be able to develop the coffee roaster and to maximize machine use and time efficiency in roasting coffee. The research method used is the Quality Function Deployment (QFD) method by conducting field surveys aimed at finding out the level of consumer needs by distributing questionnaires and looking for information about what the need to make it easier to roast coffee beans. The location of this research was carried out in several café or coffee shop in Padang City. Based on the column weight, it was found that the strongest priority in the technical response was the design aspect with a value weighting of 38.64, followed by the material criteria aspect with a value weighting of 66.1, then time and energy efficiency with values ​​weighting of 30.34 and 15 respectively.. The design for developing coffee roaster according to consumer needs lies in a more affordable price which makes the use of materials and sizes of horizontal sangria equipment cheaper compared to conventional coffee roasting equipment.
Co-Authors Abdul jalil Adriyan Akmal, Hamdani Anrinal Asmara Yanto Azhar, Fikri Firdaus, Syahrul Hendra, Surya Ilhamdi, Muhammad Mastariyanto Perdana Memori, Zultri Nurzal, Nurzal Putri Pratiwi Satria, Fajri Ilham Sucipto, Joko Sulaiman Sulaiman Surianda , Jendri Yanel, Karnova