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Turbo : Jurnal Program Studi Teknik Mesin
Published by Universitas Muhammadiyah Metro
ISSN : 23016663     EISSN : 2477250X     DOI : https://doi.org/10.24127
Core Subject : Engineering,
Mechanical Engineering
TURBO ISSN (print version) 2301-6663 & ISSN (online version) 2477-250X is a peer-reviewed journal that publishes scientific articles from the disciplines of mechanical engineering, which includes the field of study (peer) material, production and manufacturing, construction and energy conversion. Articles published in the journal Mechanical include results of original scientific research (original), and a scientific review article (review). Mechanical journal published by the Department of Mechanical Engineering, Faculty of Engineering, University Muhammadiyah of Metro for publishing two periods a year, in June and December with the number of articles 14-20 per year . Editors receive manuscripts in mechanical engineering from various academics, researchers and industry practitioners.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 509 Documents
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U-Value Analysis Of Coil in Box Heat Exchangers Using Log Mean Temperature Difference (LMTD) Method Fitriyanti, Nurwulan
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3407

Abstract

Heat exchangers take an important role in the vapor compression refrigeration system as either condenser or evaporator. In this study, the development of coil in box heat exchangers was conducted and analyzed as an evaporator. The device consisted of an insulated box with dimensions of 28 cm x 18 cm x 20 cm and the copper pipe with 0.006 m diameter and 3.65 m length. The heat was exchanged between the refrigerant R134a inside the pipe and the air outside the copper pipe. The temperatures at the inlets and outlets were measured by K-type thermocouples. Multiple experiments with the different air velocities were conducted. The log mean temperature difference (LMTD) method was used to analyze the overall heat transfer coefficient (U-Value) of the heat exchanger. The results show that the average U-Value was 76.9 W/(m2K).
Manufacturing Process and Benefits of Glass-Ceramics from Basalt Rocks sugiyanto, sugiyanto
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3186

Abstract

As a means of promoting national independence, the growing usage of dental implants must be bolstered by the advancement of indigenous materials. Indonesia possesses many natural resources that could be utilized as a material for dental implants. Bioceramic materials, which include bioactive, bioresorbable, and bioinert materials, can be used for dental implants. Glass-ceramics from basalt rocks are currently regarded as one of the bioactive materials of interest. In this review article, various techniques for turning basalt into glass-ceramics are discussed. By using glass-ceramics from basalt rocks as a potential supply of dental implant materials, a country's independence and the welfare of its citizens will be supported.
Mechanical Properties Analysis of Composites (PLA, Chitosan and Calcium Prosphate) for bone implants fikri, Muhammad Luqman Saiful; Zaenudin, Moh Zaenudin; Ujianto, Onny; mahfud, Imam
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3833

Abstract

This research explores the mechanical properties of composites made from Polylactic Acid (PLA), chitosan, and calcium phosphate, which have potential applications in bone tissue engineering due to their biocompatibility and biodegradability. This research aims to optimize the strength and durability of composites for biomedical use, with a focus on tensile strength, elongation and surface hardness. This research found that the addition of calcium phosphate increased the tensile strength and hardness of the PLA matrix to optimal concentrations, the highest tensile strength value of 80 MPa while chitosan increased elasticity and ductility. The hardness test results show an average value of 309 HV/100. The combination of these materials produces a balanced composite with better mechanical properties, making it suitable for bone implant applications.
Pengaruh Co-Firing Biomasa Kayu Kaliandra Dan Batu Bara Terhadap Performa Dan Emisi Gas Buang PLTU Sa’u, Putra Adhitya Frensly; Jasron, Jahirwan Ut; Sanusi, Arifin
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3397

Abstract

Fossil fuels such as coal still dominate as fuel for power plants worldwide. Using fossil fuels in most power plants can increase greenhouse gas (GHG) emissions, which affect climate change. Biomass is a renewable energy source expected to reduce greenhouse gas emissions. The use of biomass energy sources as a mixture of fossil fuels, known as co-firing in power plants, has been widely done to reduce dependence on fossil fuels. This research will review the influence of biomass mixture on the efficiency of coal power plant boilers. The mixture's composition and the type of biomass used will significantly affect the Boiler's efficiency. The percentage of biomass composition, as well as the proper combustion settings, will be able to produce optimal boiler efficiency. The study in this research is expected to provide an overview of the performance of a power plant that performs co-firing so that in addition to getting the benefits of reducing greenhouse gas emissions, good boiler efficiency is also obtained.
Hardness Analysis Of Hard Facing In Shield Metal Arc Welding (Smaw) Welding Process For Manufacturing Excavators Bucket Teeth Using Hot Rolled Plate Ks 440 Material Rerung, Oktovianus Dharma
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3190

Abstract

In the context of increasing development across regions, the demand for adequate heavy equipment to support construction has become crucial. Wheel loaders and excavators are commonly used heavy equipment for various tasks, including excavation, material handling, and mining operations. The bucket, a crucial component responsible for digging and lifting materials in these machines, often experiences wear and breakage during operation, particularly in the bucket teeth – the claw-like structures at the bucket's end. This study focuses on the design and improvement of bucket teeth using the hard facing technique, a welding process utilizing wear-resistant electrodes. The choice of material, Hot Rolled Plate Ks 440, combined with proper hard facing electrode selection, aims to enhance wear resistance and prolong the lifespan of bucket teeth. The research incorporates Shield Metal Arc Welding (SMAW) for its simplicity and effectiveness. Experimental results, analyzed using Analysis of Variance (ANOVA), reveal significant influences of cooling and electrode factors on hardness (measured in HRC) of the bucket teeth. The combination of welding electric current, electrode type, and cooling method impacts hardness significantly. The best-performing bucket teeth, with a mean hardness of 49.459 HRC to 50.778 HRC, meet or exceed the standards set by AISI 4130 steel. The study aligns with heat treatment theories for surface hardness improvement in steel, showcasing the effectiveness of the proposed design and hard facing approach.
Experimental study of the effect of inclination angle variations of the turbine shaft on the Archimedes screw turbine efficiency Anwar, Zainuri; Dzaky, Muhammad Irfan; Rifa'i, Ahmad Imam; Hidayati, Baiti; Sunarso, Edi
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3692

Abstract

Archimedes Screw turbine is a type of turbine that can operate at low heads. One of the parameters that influences turbine performance is the tilt angle of the turbine shaft. This research aims to determine the effect of the turbine shaft tilt angle on the performance of the Archimedes screw turbine using experimental methods. The experiment was carried out in the river of Pematang Gajah Village, Jambi Province, by varying the tilt angle of the turbine shaft, namely 10°, 20°, 30°, 40°, and 50°. The test results showed that the highest turbine efficiency occurred at a turbine tilt angle of 30° with an average efficiency value reaching 78%. This condition occurs because the flow through the turbine blade is less compared to other turbine shaft tilt conditions so that the fluid force is completely converted into energy. The electrical energy produced by turbine generators can reduce dependence on electricity supplies from the central grid and become more energy-independent. In addition, stable and affordable energy sources can improve the quality of life and support the social and economic development of society.
Analisis Variasi Nilai Cetane dan Timing Penginjeksian Bahan Bakar Terhadap Kinerja Mesin Diesel Monasari, Ratna; Kurniawan, Alfian Seina; Farida, Nike Nur; Abikusna, Setia; Firdaus, Ahmad Hanif
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3478

Abstract

Tingginya penggunaan kendaraan diesel di Indonesia memberikan preferensi bahan bakar yang berbeda di pasaran. Beragam jenis bahan bakar diesel tersebut memiliki berbagai keunggulannya masing-masing dengan nilai cetane yang berbeda. Nilai cetane pada bahan bakar diesel sangat berpengaruh dalam proses pembakaran yang terjadi. Selain hal tersebut, waktu penginjeksian bahan bakar yang terlalu cepat atau lambat juga dapat mempengaruhi daya yang dihasilkan oleh mesin diesel. Untuk mengatur waktu penginjeksian bahan bakar perlu disesuaikan dengan nilai cetane bahan bakar yang digunakan. Proses ini disebut dengan engine tuning. Tujuan dari penelitian ini yaitu mengetahui pengaruh variasi nilai cetane dan waktu penginjeksian bahan bakar terhadap daya dan SFC yang dihasilkan. Metode pengujian eksperimental dilakukan dengan menguji mesin uji pada sasis dinamometer. Waktu penginjeksian bahan bakar dilakuan sekitar 2 – 40 piston mendekati titik mati atas dari setiap variasi bahan bakar. Dalam penelitian ini diperoleh bahwa kinerja terbaik pada sebuah mesin diesel yang dilakukan proses tuning dapat meningkatkan daya yang dihasilkan sebesar 196,4% dari kondisi standar.
Rancang Bangun Mesin Pengayak Pupuk Organic Dari Pelepah Kelapa Sawit Bancin, chandra defri
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3618

Abstract

Pelepah sawit merupakan limbah yang terbuang begitu saja di area perkebunan. Limbah pelepah sawit dapat dimanfaatkan sebagai bahan untuk pupuk kompos. Pelepah sawit yang telah dicacah kemudian diurai setelah penguraian pupuk kompos pelepah sawit harus diayak agar pupuk yang dihasilkan bersih dari kotoran dan sampah. dimana pengayakan pupuk kompos masih dilakukan secara manual, dimana pengayakan ini memakan banyak waktu dan tenaga manusia. Maka peneliti merancang sebuah alat untuk menyaring pupuk kompos yang digunakan untuk mengurangi sampah dari pelepah kelapa sawit. Mesin pengayak kompos dapat mempermudah memisahkan kompos dari kotoran dan sampah. Cara kerja mesin pengayak kompos adalah tenaga diteruskan dari motor penggerak dengan menyalurkan daya melalui puli dengan perantara sabuk (v) dan mengerakan Gearbox WPA 60,Gearbox meneruskan daya ke kopling dan universal joint, lalu diteruskan  kembali ke bearing, dan kemudian dihubungkan ke tabung ayakan dan akan memutar tabung ayakan. Tujuan dari pembuatan mesin pengayak ini adalah untuk mendapatkan hasil penyaringan kompos dengan kualitas yang lebih baik dan bersih dari sampah dan kotoran. Mesin pengayak ini dibuat untuk mencegah masuknya sampah dan kotoran pada saat proses pengayakan. Mesin pengayak ini memiliki dimensi panjang 1,5 cm, lebar 1 cm, dan tinggi 9 cm. Hasil pengujian mesin pengayak ini menunjukkan bahwa mesin ini mampu mengayak kompos dengan kapasitas 30 kg dalam waktu 30 detik
Pengaruh Variasi Panjang Pipa Kapiler Terhadap Daya Kompresor Dan Cop (Coefficient Of Performance) Ac Split ridhuan, kms; wahyudi, tri cahyo; Sutiase, I Wayan
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3777

Abstract

Fungsi pipa kapiler yaitu menurunkan tekanan refrigerant dan mengatur aliran refrigerant. Tujuan penelitian untuk mengetahui pengaruh panjang pipa kapiler dengan evaporator terhadap pendinginanan ruangan dan COP serta penurunan suhu di evaporator. Metode penelitian yang dilakukan yaitu eksperimental, dengan menggunakan AC Split, daya 1 Pk , panjang pipa kapiler standar, 0,5 meter dan1 meter,refrigerant R-22, tekanan 70 Psi. Adapun hasil yang diperoleh temperatur pada panjang pipa  0,5 meter diperoleh hasil 10 ℃  .pada panjang 1 meter sebesar 8 ℃. Pengaruh panjang pipa kapiler dengan evaporator terhadap COP terjadi pada kondisi standar yaitu sebesar 4,02. Pada panjang 0,5 meter diperoleh 3,99 . Panjang 1 meter diperoleh hasil 3,8 yang mana terjadi penurunan jika dibandingkan dengan kondisi standar dan 0,5 meter. Penurunan suhu yang terjadi pada evaporator didapatkan diperoleh hasil sebesar 10 ℃  dimana terjadi penurunan jika dibandingkan dengan kondisi standar. Temperatur antara pipa kapiler dengan evaporator pada variasi 1 meter sebesar 8 ℃ yang mana terjadi penurunan dibandingkan kondisi standar dan 0,5 meter.
Analisa Performansi Turbin Uap Kapasitas 1,8 MW pada Pabrik Kelapa Sawit Kapasitas 50 Ton/Jam Sitanggang, Elprida Kristina; Effendi, Zulham; Rangkuti, Ika Ucha P
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3496

Abstract

Turbin uap merupakan sumber energi atau penggerak mula yang mengubah energi potensial menjadi energi kinetik kemudian mengubah energi kinetik tersebut menjadi energi mekanik berupa putaran poros turbin. Untuk melihat kemampuan turbin dalam mengubah energi kalor menjadi energi mekanik maka perlu diketahui perbandingan antara kerja aktual dengan kerja ideal yang disebut dengan efisiensi isentropik. Nilai efisiensi isentropik dipengaruhi oleh tekanan uap dan temperatur masuk turbin, laju massa uap, daya dan desain turbin. Pada penelitian ini diperoleh efisiensi isentropik turbin uap berdasarkan data spesifikasi sebesar 44,09% dan nilai efisiensi isentropik tertinggi pada saat turbin uap beroperasi sebesar 22,16%. Pada saat beroperasi diperoleh efisiensi tertinggi pada tekanan uap masuk sebesar 27 bar, tekanan uap keluar sebesar 3,4 bar dan kualitas uap sebesar 0,866. Tingginya efisiensi isentropik turbin uap dipengaruhi oleh temperatur, tekanan uap masuk dan tekanan uap keluar, serta umur atau umur turbin yang digunakan pada pabrik pengolahan kelapa sawit.

Page 40 of 51 | Total Record : 509

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