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All Journal Transmisi Turbo : Jurnal Program Studi Teknik Mesin Sinergi Polmed : Jurnal Ilmiah Teknik Mesin
Widiharsa, Fransiskus A.
Universitas Merdeka Malang
Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ANALISA KAPASITAS DAN TEKANAN ALIRAN FLUIDA PADA INSTALASI POMPA RANGKAIAN SERI PARALEL BERBASIS MICROCONTROLLER Yongky Arta; Fransiskus A. Widiharsa
TRANSMISI Vol 14, No 2 (2018): Edisi September 2018
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v14i2.4684

Abstract

Pompa rangkaian seri paralel merupakan rangkaian pompa yang di gunakan untuk memindahkan zat cair bertekanan rendah ke tekanan yang lebih tinggi. Dimana pada alat untuk sistem rangkaian seri dan paralel masih sangat rumit serta pengambilan data karena alat ukur terutama yang kurang baik. Untuk itu di buatlah teknologi terbaru dengan menambahkan microcontroller sebagai pengatur system pengambilan data ,sehingga meminimalisir kerugian dalam pengambilan data meliputi tekanan, kapasitas  serta effisiensi pompa rangkaian seri paralel. Dimana hasil pengujian perbandingan head dan kapasitas pompa rangkaian seri didapatakan  bahwa  pada pompa rangkain seri berbanding terbalik dengan pompa rangkain paralel  dimana pompa rangkaian seri nilai head lebih tinggi dibandingkan dengan kapasitas (Q). Dimana head terkecil terdapat pada bukaan katup 90° yaitu 7,06152 mH2O pada kapasitas 3,74 x 10-4 m3/s  dan head terbesar terdapat pada pembukaan katup 30° yaitu 11,2939 mH2O pada kapasitas 3,25 x 10-4 m3/s. Sedangkan . pada pompa rangkaian paralel nilai kapasitas lebih tinggi dibandingkan nilai kapasitas (Q) pompa rangkain seri  dimana nilai kapasitas terkecil pada bukaan katup 30° yaitu 6,501 x 10-4 m3/s  pada head 5,9604 mH2O dan kapasitas terbesar terdapat pada bukaan katup 90° yaitu 7,52 x 10-4 m3/s  pada head 3,81 mH2O. Pada perbandingan effisiensi dengan kapasitas, pompa rangkaian seri lebih rendah dibandingakan dengan effisiensi pompa paralel  dimana nilai effisiensi pompa seri tertinggi 10,9% pada kapasitas 3,25 x 10-4 m3/s dan effisiensi tertinggi pompa paralel 11,5% pada kapasitas 6,50 x 10-4 m3/s dimana semakin besar nilai kapasitas suatu aliran fluida maka semakin besar pula nilai effisiensi suatu pompa tersebut.
Kaji teoritis EMS (Engine Management System) dengan variasi temperatur air pendingin dan beban kerja pada kondisi stasioner pada kendaraan Toyota Avanza Angga Wahyu Pramayudha; Gunarko Gunarko; Ardyanto Darmanto; F A Widiharsa
TURBO [Tulisan Riset Berbasis Online] Vol 9, No 2 (2020): Jurnal Turbo Desember 2020
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v9i2.1180

Abstract

EMS is a control system on the engine to regulate the proper mixing of air and fuel, accurate ignition timing, and control of other systems on the engine, according to the conditions and workload of the vehicle. The EMS component consists of sensors, ECU, and actuator. Engine control is fully regulated by the ECU. After getting data from the sensor, the ECU sensor will signal the actuator to control the engine, so that the work of the engine can be controlled according to the conditions of the engine. The effect of the cooling water temperature sensor is very large at stationary (Idle Speed Control/ISC). This research method is carried out by varying the temperature of cooling water (Engine Coolant Temperature/ECT) to get the mass of gasoline, air mass, air fuel ratio, engine speed, ignition angle, and gasoline consumption at each ISC load. The results of the research and data processing show that gasoline consumption will decrease every time the cooling water temperature increases. The AC (Air Conditioner) load ranges from 1,123 x 10-2 to 2,164 x 10-2 kg/hour, the power steering load ranges from 6,311 x 10-3 to 9,482 x 10-3 kg/hour, the electrical load ranges from 6,608 x 10-3 to 7,876 x 10-3 kg/hour and without load ranges from 6,024 x 10-3 to 7,920 x 10-3kg/hour. From these data it can be concluded that the effect of the ECT sensor is very large on engine performance at stationary rotation (ISC).Keywords: Sensor, ECU, Actuator.
Comparison of the Performance of Mini Generator Water Turbines in Series and Parallel Flow Systems Kriswidijatmoko, Mikael Adi; Hariyanto, Rudi; Widiharsa, Fransiskus Asisi
TRANSMISI Vol 19, No 2 (2023): September 2023
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v19i2.12079

Abstract

The need for electricity is crucial in modern life, but the depletion of fossil fuel resources and their negative impact on the environment has led to the need for alternative, sustainable, and renewable energy sources. One of the most widely used renewable energy sources is hydro energy, which can be harnessed through the use of water turbine generators. This research aims to design, prototype, and test the performance of a mini-series and parallel water turbine generator system with a 24-volt system. Furthermore, this research will evaluate the difference in performance between the series and parallel systems and analyze the efficiency of the mini-series and parallel water turbine generator system. The focus of this research is on the efficiency of the water turbine generator system with variations in water flow, but it does not cover large-scale industrial applications. This research aims to provide sustainable and environmentally friendly energy sources as an alternative to conventional energy sources. The results of this research can serve as a reference for researchers and practitioners interested in the development of renewable energy sources, particularly water turbine generators. In the testing, the Series Turbine Series Generator system with a water flow rate of 6.38 L/min produced a maximum power of 2.43 watts, while the Parallel Turbine Series Generator system with a water flow rate of 13.01 L/min produced a maximum power of 2.142 watts. The efficiency ratio between the Series Generator and Parallel Generator is 1.5, with the Series Generator achieving a maximum efficiency of 38.6% in the Series Turbine Series Generator system, and the Parallel Generator achieving a maximum efficiency of 25.3% in the Series Turbine Parallel Generator system.
Impact of Bioethanol and VCO Oil Additives on Power Output and Exhaust Gas Emissions in a 2-Stroke Gasoline Engine Hariyanto, Rudi; Septiningsih, Dwi; Widiharsa, F.A; Ma'ruf, Mochamad
TRANSMISI Vol. 21 No. 1 (2025): March (2025)
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v21i1.14534

Abstract

This research focuses on evaluating the impact of adding Virgin Coconut Oil (VCO) and bioethanol on the power output and exhaust gas emissions of a 2-stroke motorcycle engine. In 2-stroke engines, lubricating oil is crucial for mixing with the fuel and lubricating the cylinder walls to reduce friction and wear. This study aims to investigate how varying concentrations of VCO oil and bioethanol affect engine performance and emissions. VCO oil primarily contains saturated fatty acids, including about 53% lauric acid and 7% caprylic acid. The study utilized bioethanol derived from sugar cane molasses to enhance the burning point of VCO oil. Exhaust emissions are the by-products of fuel combustion released through the engine’s exhaust system. Engine performance refers to its ability to convert fuel into useful power. The results indicate that the power output with 500 ml of ethanol mixed with VCO oil outperforms other mixtures, including pure VCO and lower ethanol concentrations. Additionally, higher ethanol concentrations in VCO oil lead to improved combustion efficiency and reduced exhaust gas emissions. This study demonstrates that optimizing ethanol and VCO oil ratios can enhance engine performance and reduce emissions.
OPTIMASI KINERJA FURNACE PELEBURAN ALUMINIUM MELALUI APLIKASI CERAMIC FIBER SEBAGAI MATERIAL ISOLASI TERMAL Hariyanto, Rudi; Kurniawan, Pradhana; Widiharsa, Fransiskus Asisi; Widyastuti, Ike; Lestari, Dicky Candra
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 2 (2025): Edisi Agustus
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v6i2.2331

Abstract

Proses peleburan alumunium membutuhkan kalor setara temperatur 660°C. Selama proses peleburan, energi panas di ruang peleburan mengalami kerugian berupa perpindahan panas secara konduksi, melalui dinding furnace  ke lingkungan. Agar proses peleburan logam bisa berjalan efektif, maka penting memilih bahan dinding furnace yang mampu meredam kerugian kalor. Penelitian ini membahas perbandingan unjuk kerja furnace peleburan alumunium berdasar perbandingan perpindahan panas secara konduksi yang terjadi pada dinding furnace peleburan antara yang menggunakan dan tanpa menggunakan isolator berupa lapisan ceramic fiber. Dinding furnace dibuat dari bahan semen tahan api dengan ketebalan 3 cm. Adapun tebal lapisan ceramic fiber yang digunakan  5 cm. Hasil pengujian perbandingan tanpa dan menggunakan ceramic fiber adalah temperatur ruang peleburan tertinggi yang tanpa (TinS) = 394°C dan yang menggunakan (TinSc) = 616°C.  Temperatur luar dinding furnace tertinggi yang tanpa (Touts) = 127°C dan  yang menggunakan (Toutsc) = 61°C.  Nilai perubahan panas furnace berdasar perbandingan pada temperatur dinding dalam dan dinding luar furnace menunjukkan furnace yang menggunakan lapisan ceramic fiber menghasilkan nilai 1,72 kali lebih tinggi. Adapun perbandingan pemanfaatan kalor bahan bakar untuk peleburan adalah dari 0,615% untuk furnace tanpa lapisan ceramic fiber menjadi 1,26% untuk dinding furnace dengan lapisan ceramic fiber. Unjuk kerja furnace yang menggunakan ceramic fiber sebagai lapisan dinding furnace mampu meningkatkan unjuk kerja furnace peleburan alumunium 2 (dua) kali lebih baik dibanding dinding furnace tanpa dilapisi keramic fiber.
Analisis Kelayakan Pompa Elektrik Pemadam Kebakaran Klinik Mata PT X Fasli; Hariyanto, Rudi; Widiharsa, Fransiskus Asisi; Darto; Kurniawan, Pradhana
TRANSMISI Vol. 21 No. 2 (2025): September (2025)
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v21i2.15653

Abstract

In a pumping system, one important parameter that needs to be analyzed is the hydraulic power needed to move the fluid. This hydraulic power reflects how much energy is needed to move the fluid through the piping system, and this is highly dependent on factors such as flow rate, head, and the characteristics of the pump itself. The purpose of this Pkn is to determine the hydraulic power of the pump. In pumping, it is necessary to pay attention to several factors so that the pump can work optimally, such as the height of the water to be sucked and the height of the building to be distributed and the design of the pipes as water channels. The method used to determine the hydraulic power of the pump is through data collection. From the results of data processing, we can find out the different flow rate values ​​based on the discharge and pipe diameter, flow losses obtained at pipe joints such as major losses and minor losses, the power required to drive the pump is 55 KW and the hydraulic power is 45.53840 KW, and the pump efficiency is 82.79%.
Co-Authors Agus Mulyono Angga Wahyu Pramayudha Ardyanto Darmanto Atim Abdul Ajis Caska - Celcio Novian Primananda Darto Fasli Gigih Dwi Nugroho Gunarko Gunarko Heris Pamuntjar Kriswidijatmoko, Mikael Adi Kurniawan, Pradhana Lestari, Dicky Candra Ma'ruf, Mochamad Ma'ruf, Mohammad Nurhamdoko B. Nurhamdoko Bonifacius Nursubyakto Nursubyakto Pratama, Demmy Eka Rudi Hariyanto Rusdijanto Rusdijanto Septiningsih, Dwi Widyastuti, Ike Yongky Arta