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Penjernih Kabut Asap Kebakaran Hutan dengan Media Plasma dan Karbon Aktif Terintegrasi Muhammad Isnan; Ainur Rofiq; Ibnu Awal Hasanudin; Thoharudin Thoharudin
Semesta Teknika Vol 21, No 2 (2018): NOVEMBER 2018
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/212217

Abstract

Smoke haze from forest fires consists of Volatile Organic Compounds (VOC) and particulate matter which has micro size that can cause the respiratory disorders. Therefore, the device to reduce the matters is necessary to prevent the respiratory health including the lung. One of the many methods is using plasma and activated carbon for eliminating the matters from the air that was conducted in this study. Smoke haze was modeled as exhaust gas obtained from rice husk combustion. The velocity of gas in the cleaning device was controlled in various velocities, namely 0.3, 0.9, 1.2 and 1.5 m/s. The calculation of smoke haze particulate matter and VOC was conducted in a simple method by using cutton as filter media to separate the particulate matter and VOC from the gas. This study resulted that the increasing of velocity affected the increasing of particulate matter and VOC filtered on the cutton. The plasma utilisation on the device affected the reduction of particulate matter and VOC filtered on the cutton. The application of both plasma and activated carbon in the device could achieve the best performance of eliminating the particulate matter and VOC indicated by the clean cutton obtained after filtering. The highest efficiency of particulate matter and VOC removal was achieved by applicating both plasma and activated carbon with gas velocity of 1.5 m/s, namely 96.1 %.
Simulasi CFD Aliran Stratified Air-Udara pada Pipa Horisontal Sukamta Sukamta; Thoharudin Thoharudin; Dedy Melianto Nugroho
Semesta Teknika Vol 21, No 2 (2018): NOVEMBER 2018
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.212227

Abstract

Two-phase flow can be found in industries, such as petroleum, electricity generation. In geothermal power plants, two-phase flow occurs from a mixture of water and steam which should be avoided in the piping system because it can cause equipment damage in the operating system. Therefore, an operator and engineer need a knowledge of flow patterns, phenomena and characteristics of the two-phase flow. One of the methods to predict the flow pattern is ud\sing the Computational Fluid Dynamic (CFD). This CFD simulation was modeled using Ansys Fluent 15.0 software to determine the changes of Stratified flow characteristics. The model used is Volume of Fluid (VOF). The fluid type is water and air. The variation of superficial water velocity JL of 0.025 m/s - 0.1 m/s while the superficial air velocity (JG) of 0.05 m/s - 1 m/s. The pipe used is an acrylic of 19 mm diameter and length of 1000 mm. The simulation results show that: (1). Stratified flow occurred for the low velocity of the liquid and gas phases. It was shown by the water and air are clearly separated. (2). Flow patterns are not stable, but it can change depending on the superficial velocity of gas and water. (3). The larger of JG causes the wave height because of Bernoulli’s effect so that it will make the stratified wavy or ripple flow pattern. (4). The frequency of stratified-wavy and ripple waves will tend to decrease when the JL increases, while the effect of JG is insignificant. Furthermore, it can be concluded that the speed of gas must be regulated so as not too large to the speed of water.
PERANCANGAN ROLLER SPINNING SEBAGAI MESIN PEMBUAT PANCI DARI PLAT ALUMINIUM Thoharudin Thoharudin; Novi Caroko; Wahyudi Wahyudi; Suzad Miko Sembiring; Hanung Yudistira Aji
JMPM (Jurnal Material dan Proses Manufaktur) Vol 1, No 2 (2017): Desember
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v1i2.4180

Abstract

Makalah ini menyajikan proses perancangan mesin roller spinning yang digunakan untuk membuat panci dari plat aluminium. Proses perancangan digunakan untuk menentukan dimensi dari komponen penting dari mesin roller spinning dan kebutuhan daya penggeraknya. Proses perancangan melibatkan persamaan-persamaan yang diambil dari beberapa referensi. Hasil dari perancangan ini menampilkan bahwa kebutuhan ukuran baut sambungan flange poros-mandrel minimal berukuran M6 kelas 4.6 berjumlah 8 buah, diameter poros penggerak minimal sebesar 40,54 mm terbuat dari bahan baka AISI 6150. Kebutuhan daya pengerolan bervariasi tergantung dari ketebalan plat dan kecepatan putar motor yang digunakan, semakin tebal plat dan kecepatan motor maka penggunaan daya penggerak semakin besar. Untuk kebutuhan industri mikro disarankan kecepatan putar maksimum sebesar 500 rpm agar kebutuhan daya untuk pengerolan plat tebal 1,5 mm cukup dengan motor listrik berkapasitas 1 HP.
Unjuk Kerja Motor Bensin Berbahan Bakar Campuran Pertalite dan Pyrolytic Oil dari Pirolisis Kantong Plastik Berkatalis CaO Novi Caroko; Fiqih Anas Mubaroq; Tito Hadji Agung Santoso; Thoharudin Thoharudin
JMPM (Jurnal Material dan Proses Manufaktur) Vol 2, No 2 (2018): Desember
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.2228

Abstract

AbstrakPenelitian ini bertujuan menguji secara eksperimental pengaruh penggunaan campuran minyak pirolisis dan pertalite pada torsi, tenaga, dan konsumsi bahan bakar motor bensin Honda Beat 110cc. Minyak pirolisis dicampur dengan pertalite dengan persentase volume minyak pirolisis: 0%, 5%, 10%, 20%, dan 30%. Metode yang digunakan dalam penelitian ini adalah menggunakan dynotest tool kit dan fuel consumtion test. Parameter yang diukur adalah nilai torsi, daya, dan konsumsi bahan bakar. Hasil penelitian menunjukkan bahwa pertalite murni menghasilkan torsi dan daya tertinggi dibandingkan dengan variasi campuran pertalite dengan minyak pirolisis lainnya. Hal ini dimungkinkan karena nilai viskositas pertalite lebih rendah dibandingkan dengan variasi lainnya. Konsumsi bahan bakar terendah terdapat pada variasi 70% volume pertalite dan 30% volume minyak pirolisis yang menghasilkan konsumsi bahan bakar sebesar 41,66 km/I.AbstractThis study aims to experimentally test the effect of using a mixture of pyrolysis oil and Pertalite on torque, power and fuel consumption of the 110cc Honda Beat gasoline motor. Pyrolysis oil is mixed with pertalite with the percentage volume of pyrolysis oil: 0%, 5%, 10%, 20%, and 30%. The method used in this study is to use the dynotest tool kit and fuel consumption test. The parameters measured are the value of torque, power and fuel consumption. The results showed that pure pertalite produced the highest torque and power compared to variations of the pertalite mixture with other pyrolysis oils. This is possible because the pertalite viscosity value is lower compared to other variations. The lowest fuel consumption is found in 70% volume of pertalite and 30% volume of pyrolysis oil which results in fuel consumption of 41.66 km / I.
Perancangan Instalasi Pemanen Air Hujan Bambang Riyanta; Sunardi Sunardi; Thoharudin Thoharudin; Fitroh Anugrah Kusuma Yudha
Mitra Abdimas: Jurnal Pengabdian kepada Masyarakat Vol 2 No 2 (2022)
Publisher : Medan Resource Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.9 KB)

Abstract

Due to the dry season in recent years longer than the dry season in previous years and the increase in population and the need for clean water use, especially in the Special Region of Yogyakarta, there has been a decrease in groundwater levels which has resulted in residents having difficulty getting groundwater. On the other hand, people do not have a culture of using rainwater to meet their daily water needs. This community service program is carried out in order to help the movement to harvest rainwater, especially in the RT 02 RW 01 area of Patangpuluhan Village, Wirobrajan District. The program is carried out by harvesting rainwater to be injected into existing wells, harvesting rainwater to be stored in reservoirs and harvesting rainwater to be injected in existing infiltration wells. The output of this community service program is in the form of an integrated system of gutters for water catchers, filters and pipelines for injection into wells, an integrated system of gutters for water catchers, filters and direct pipelines to water reservoirs and an integrated system of gutters, filters and injection pipelines into existing infiltration wells.
Design and Analysis of Venturi Microbubble Generator Using Computational Fluid Dynamics Thoharudin Thoharudin; Sunardi Sunardi; Fitroh Anugrah Kusuma Yudha; Muhammad Nadjib; Arif Setyo Nugroho
Eksergi : Jurnal Teknik Energi Vol 19, No 2 (2023): MAY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i2.4305

Abstract

The necessity for dissolved oxygen in water is crucial for the survival and growth of aquatic organisms, particularly tilapia. Seventy-five percent of tilapia will die if there is insufficient dissolved oxygen in the water. This work seeks to develop a venturi bubble-generating technique to combat the scarcity of dissolved oxygen in the water. A floating pump with a capacity of 12 m3/hour was selected as the medium for distributing water and generating vacuum pressure to draw in air for mixing with the water flow in the venturi. Ansys Fluent was used to model piping and venturi systems. The piping system was modeled with a single-phase (water) flow at a steady state, whereas the flow in the venturi was modeled with a multiphase (air and water) flow under transient situations. The simulation findings revealed that the pressure drop at the 90-degree elbow was much greater (27.17 kPa) than that at the 45-degree elbow (16.53 kPa). A 1-inch input diameter venturi produced bubbles with an average diameter of 105 µm, whereas a ½ inch venturi bubble generator produced bubbles with an average diameter of 83 µm. Owing to the numerous advantages of adopting a six-outlet piping system with a ½ inch venturi, this design is recommended for floating pumps with a capacity of 12 m3/h.