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All Journal Jurnal Teknik Mesin Jurnal Energi Dan Manufaktur Rotasi LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Jurnal Pengabdian UntukMu NegeRI JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN JMM (Jurnal Masyarakat Mandiri) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Teknik Mesin Indonesia Jurnal Abdi Insani Journal Of Human And Education (JAHE) Jurnal Pengabdian Vokasi Jurnal Pengabdian Kepada Masyarakat (JPKM)
Matheus M. Dwinanto
Universitas Nusa Cendana
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Studi Eksperimen Rumah Pengering Umbi Porang Sistem Hibrid (Energi Surya–Biomassa) dengan Variasi Tebal Irisan Chip Koehuan, Verdy Ariyanto; Bai’oef, Abner Paulus; Dwinanto, Matheus M.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i02.9364

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh ketebalan chips umbi porang terhadap distribusi temperatur dan kelembaban udara dalam rumah pengering solar dryer sistem hibrid (energi surya-biomassa) terhadap laju pengeringan umbi porang. Metode penelitian adalah metode eksperimen pada rumah pengering menggunakan plastik ultra violet untuk menyerap panas radiasi dari sinar matahari dan energi termal dari tungku pembakaran biomassa kemudian dialirkan ke dalam rumah pengering melalui alat penukar panas. Hasil penelitian menunjukkan temperatur rata-rata dalam rumah pengering dengan masing-masing ketebalan chip umbi porang 3 mm, 4 mm, dan 5 mm, yaitu 47,030C, 48,740C dan 49,730C. Kadar air akhir chips umbi porang setelah pengeringan adalah 11,74%bb dengan laju pengeringan tertinggi sebesar 0,330 kg/jam dan lama pengeringan 5 jam pada ketebalan 3 mm. Efisiensi pengeringan, dan efisiensi rumah pengering masing-masing diperoleh pada ketebalan chip 3 mm, yakni sebesar 17,86 % dan 6,06 %.
Produksi Gas HHO melalui Perubahan Polaritas Sumber Listrik DC Mandala, Jani F.; Koehuan, Verdy Ariyanto; Dwinanto, Matheus M.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i02.9579

Abstract

Salah satu bentuk energi yang disubtitusikan adalah produksi gas HHO sebagai zero polutan dengan sumber baku utama air untuk digunakan sebagai bahan bakar mesin pembakaran dalam. Terdapat beberapa metode untuk menghasilkan gas HHO, salah satunya diperlukan reaktor HHO yang berisi cell dari besi anti-karat sebagai elektroda-anoda dan air berupa elektrolizer sebagai katalis produk gas HHO sebagai akibat triger sumber listrik DC. Prinsip kerja ini mendasari untuk memodifikasi produks gas HHO dengan eksperimen material-material dari chassis elektrik dengan kandungan besi anti-karat dan diberi perlakuan PWM 50 herz dutycycle 50 dengan rentang waktu 1 menit hingga terjadi perubahan polaritas sumber DC. Hasil ekperimen menunjukkan rancagan reaktor dengan jumlah plat 13 buah, bekerja pada tegangan 12 volt dan arus 10 ampere dikoneksikan pada plat besi anti-karat sebagai anoda-katoda dan penggunaan elektrolizer (NaHCO3) dapat menghasilkan gas HHO sebanyak 0,151 liter. Hasil gas HHO melalui perlakuan perubahan polaritas dengan waktu rerata 2,42 menit dan efisiensi 10,148% sedangkan tanpa perlakuan perubahan polaritas, waktu rerata 2,39 menit dan efisiensi 10,219%.
SIMULASI KINERJA BATCH AIR BLAST FREEZER DENGAN MENGGUNAKAN SISTEM REFRIGERAN R404A DAN R1234YF Senu, Stefanus Stef; Dwinanto, Matheus M.; Jafri, Muhamad
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 01 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i01.12245

Abstract

Performance simulation on air blast freezer batches using two types of refrigerants, namely R404A and R123yf. Air blast freezer is a device used in the food and beverage processing industry to cool products quickly by utilizing cold air generated by convection cooling, modeling and simulation of air blast freezer batch systems using computer modeling software. Important variables considered in the simulation include cooling chamber size, airflow velocity, air distribution, and product geometry characteristics. then performed performance analysis using both refrigerants, R404A and R123yf. The use of R123yf refrigerant as an alternative to R404A can also provide guidance in the selection of more environmentally friendly refrigerants without sacrificing system performance. With improved product efficiency and quality, food and beverage processing industries can optimize refrigeration processes and increase their overall productivity.
Studi Eksperimen dan Simulasi Termodinamika Mini Refrigerator Dama, Firdaut Loja; Adoe, Dominggus G. H.; Dwinanto, Matheus Magnus
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 10 No 02 (2023): Oktober 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v10i02.13648

Abstract

Household refrigeration machines (fridges) are household appliances that are widely used in families in Indonesia. However, the use of working fluids still uses this type of working fluid which causes thinning of the ozone layer and global warming. Therefore, this research aims to analyze the effect of evaporation temperature on work coefficient and exergy efficiency by using R600a working fluid as an environmentally friendly fluid. This research uses experimental and simulation methods using Cooltols software. The research results show that increasing the evaporation temperature has an impact on increasing the work coefficient, the heat absorbed by the evaporator but reducing the compressor power, and the heat released by the condenser. The greatest increase in exergy destruction is found in the evaporator, where exergy efficiency increases. So R600a is very suitable for use in refrigerators.
Studi Pengaruh Temperatur Evaporasi Terhadap Kinerja Siklus Rankine Organik Menggunakan Fluida Kerja R245FA Dan R515A Dwinanto, Matheus Magnus
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 10 No 02 (2023): Oktober 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v10i02.14231

Abstract

Nowadays, many power plants with the organic Rankine cycle (ORC) have been widely used in the world because they can utilize low temperature heat sources such as industrial waste heat, biomass, geothermal and solar energy. The working fluid for the ORC system must meet several physical property criteria including, environmentally friendly, non-flammable, non-toxic, and non-corrosive. Therefore, this study aims to analyze the effect of evaporation temperature on the energy performance of a standard organic Rankine cycle with a turbine power of 20 kW with working fluids R245fa and R515A. System simulation using Genetron Properties software with the condensation temperature maintained constant at 40oC and the evaporation temperature varied at 70 – 80oC. The results of this study show that increasing the evaporation temperature will greatly increase pumping power consumption but reduce the pressure ratio in the turbine and the thermal efficiency of the system. The pumping power used to circulate R515A is ±2.2 times higher than circulating R245FA but the thermal efficiency is ±9.75% higher.
Simulasi Kinerja AC Split Menggunakan R32, R410A, R290, dan R1234YF Dwinanto, Matheus M.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 10 No 01 (2023): April 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v10i01.14245

Abstract

Air conditioning (AC) is the treatment of air to regulate temperature, humidity, cleanliness and comfortable conditions needed by humans in a room. The lecture room in the Mechanical Engineering building at Nusa Cendana University is a building that is quite busy with lecture activities and services related to students. Therefore, it is necessary to have an air conditioning system to maintain thermal comfort for students and lecturers who carry out activities. This research aims to analyze the performance of the cooling system using refrigerants R290 and R1234YF as alternative refrigerants to replace refrigerants R32 and R410A using CoolTools software version 1.01. The simulation is based on steady state conditions with the AC cooling load being 5.3 kW. The results of this simulation show that the performance of an air conditioning system that uses R290 and R1234YF as an alternative refrigerant can be used because it has a better performance coefficient than refrigerants R32 and R410A
Pengaruh Variasi Tekanan dan Jumlah Lubang Injektor Terhadap Besar Sudut Semprotan Bahan Bakar Bioetanol Naitboho, Asriel; Riwu, Defmit B.N.; Dwinanto, Matheus M.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 01 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i01.14287

Abstract

This research aims to determine the effect of variations in pressure and number of injector holes on the spraying angle of bioethanol fuel. Bioethanol fuel has become a promising alternative in reducing dependence on fossil fuels. However, proper spray characteristics are required to achieve efficient combustion and low emissions. In this research, experiments were carried out using injectors with varying numbers of holes, namely 6 holes and 12 holes and varying pressures, namely 30 Psi, 40 Psi and 50 Psi. The spray angle of bioethanol fuel is measured and analyzed using appropriate measuring equipment. The research results show that variations in pressure and number of injector holes have a significant influence on the spraying angle of bioethanol fuel. In this case, increasing the pressure tends to increase the spray angle, while increasing the number of holes tends to reduce the spray angle. This understanding is important in designing an efficient and optimal bioethanol fuel injection system. This research contributes to the development of bioethanol fuel technology and provides insight into the influence of pressure and the number of holes in the injector on spray characteristics
Simulasi Kinerja Termodinamika Refrigerator Dengan Injeksi Cairan Menggunakan R515A Dan R515B Amalo, Alexander C.; Gurnawati, Gurnawati; Dwinanto, Matheus Magnus
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 01 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i01.14914

Abstract

This research aims to analyze and compare the thermodynamic performance of refrigerators using two types of refrigerants, namely R515A and R515B, with liquid injection techniques. Refrigerators are important devices in a variety of applications, including the food, pharmaceutical, and household refrigeration industries. This simulation includes important variables such as pressure, temperature, mass flow, and thermophysical properties of both refrigerants. In addition, it also considers fluid injection technique variables such as injection amount, injection time, and injected fluid properties. The research results show a performance comparison between R515A and R515B in terms of thermal efficiency, cooling capacity, and power consumption. It was found that the use of R515B with certain liquid injection resulted in a significant increase in the overall efficiency of the refrigerator system. The results show that proper setting of the injection amount and injection time can optimize the performance of the refrigerator system. Selecting the right refrigerant and liquid injection strategy can produce a more efficient system. This research provides in-depth insight into the thermodynamic aspects of refrigerator systems and illustrates the importance of refrigerant selection and operational techniques in achieving maximum efficiency.
Simulasi Kinerja Thermodinamika AC Split Menggunakan Refrigeran R32, R1234yf, dan R290 Lamawuran, Marianus Adventus; Gurnawati, Gurnawati; Dwinanto, Matheus Magnus
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 01 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i01.14937

Abstract

Split AC is the process of regulating temperature, humidity, cleanliness, and air distribution in a room so as to achieve thermal comfort conditions for the occupants in it. The purpose of this research is to simulate the thermodynamics of a Split AC using environmentally friendly refrigerants R32, R1234YF, and R290 using Genetron Propertis software version 1.4.1. The method used in this study is a standard air conditioning performance simulation using R32, R1234YF, and R290 refrigerants with Genetron Propertis software version 1.4.1. The simulation results of the basic cycle refrigeration system performance with the working fluid R32 for the condensation temperature are maintained constant, because the temperature of the refrigerant gas through the condenser must be higher than the ambient temperature, condensation occurs in the condenser, so that the refrigerant changes form to liquid. From the simulation of the split AC thermodynamic performance, an increase in the evaporation temperature will have a significant impact on increasing the consumption of pumping power, increasing the mass ratio, and COP in the system.
Studi Simulasi Pengaruh Temperatur Evaporasi Terhadap Kinerja Energi Siklus Rankine Organik dengan Fluida Kerja R245FA, R515A, dan R1233ZD Dwinanto, Matheus Magnus; Selan, Rima Nindia; Pala, Elshaday Y.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 01 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i01.17750

Abstract

Dewasa ini, siklus Rankine organik telah menjadi salah satu solusi alternatif pembangkit listrik ramah lingkungan karena dapat menggunakan sumber kalor bertemperatur rendah atau sumber kalor berdaya rendah. Namun, penggunaan fluida kerja organik yang lebih ramah lingkungan sebagai pengganti R245FA telah menjadi tuntutan pada masa yang akan datang. Oleh karena itu, penelitian ini bertujuan menganalisis pengaruh temperatur evaporasi terhadap kinerja energi siklus Rankine organik standar dengan fluida kerja R245FA, R515A, dan R1233ZD. Kinerja termodinamika didasarkan pada variasi temperatur evaporator menggunakan perangkat lunak Genetron Properties. Besaran-besaran penting yang dianalisis adalah laju aliran massa, daya pemompaan, penyerapan kalor, pelepasan kalor, rasio tekanan turbin, dan efisiensi termal. Hasil penelitian menunjukkan bahwa peningkatan temperatur evaporasi sangat berdampak pada peningkatan konsumsi daya pemompaan, rasio tekanan di turbin, dan efisiensi termal sistem. Namun, dibutuhkan daya pemompaan yang lebih besar untuk mensirkulasikan R515A dibandingkan dengan mensirkulasikan R245FA dan R1233ZD. Sistem ORC yang menggunakan R1233ZD memiliki efisiensi termal tertinggi dibandingkan R245FA dan R515A sehingga pada masa yang akan datang fluida kerja tersebut sangat cocok untuk menggantikan R245FA.
Co-Authors Abrahan Legifani Adar, Damianus Adi Yermia Tobe Adoe, Dominggus. G.H. Aloysius Meo Amalo, Alexander C. Arifin Sanusi Bai’oef, Abner Paulus Ben Vasco Tarigan BURENI, MELKY ETYANUS MARKUS Dama, Firdaut Loja Daud P. Mangesa Daud Pulo Mangesa Defmit B.N. Riwu Domi K. Dipa Dominggus Godlief Heryson Adoe Emanuel G. N Dhey Erich Maliwemu, Erich Fransiskus Sogen Gurnawati, Gurnawati Gusnawati Gusnawati Indra H. Syaifullah Ishak Limbong Jack C. A. Pah Jack Carol Adolf Pah Jahirwan Ut Jasron Jefri Semuel Bale Kristomus Boimau Kurniawan Rifai Lamawuran, Marianus Adventus Lobo, Jefrianto Ludji, Sherly Satriani Mandala, Jani F. Marianus R. V. T. Etu Muhamad Jafri Naitboho, Asriel Ndoen, Aldian Nurhayati Nurhayati Pala, Elshaday Y. Pell, Yeremias M. Rima Nindia Selan Sancho Baptista Soares Selfiana Goetha Sengge, James Roland Senu, Stefanus Stef Sundari, Woro Tarigan, Ben V. Tobe, Adi Yermia Tualaka, Wiwi Efendi Valerius G. Seranian Verdy A Koehuan Verdy A. Koehuan Verdy Koehuan Wadu, Arky B. J. Wenseslaus Bunganaen Weo, Napsiyana Asti Yeremias M. Pell Yossie Maria Yulianty Yacob