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All Journal Rotasi LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Prosiding Semnastek JMPM (Jurnal Material dan Proses Manufaktur) Jurnal Pengabdian UntukMu NegeRI at-tamkin: Jurnal Pengabdian kepada Masyarakat Jurnal Fisika : Fisika Sains dan Aplikasinya ARMATUR : Artikel Teknik Mesin dan Manufaktur Journal Of Human And Education (JAHE)
Verdy A Koehuan
Program Studi Teknik Mesin, Fakultas Sains Dan Teknik, Universitas Nusa Cendana
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Pelatihan Perawatan Pompa Hidram untuk Kelompok Tani Utama Di Daerah Baumata Wenseslaus Bunganaen; Muhamad Jafri; Verdy A Koehuan; Isak S Limbong; Yeremias M Pell; Kristomus Boimau
at-tamkin: Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 2 (2020): At-Tamkin - Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Islam Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/attamkin.v3i2.553

Abstract

Dry land agriculture is a crop cultivation activity carried out in moderate to severe drought conditions during most of the growing season. As a result, special cultivation techniques, types of crops and farming systems are needed to enable sustainable production. The partner involved in the Program Kemitraan Masyarakat (PKM) is a farmer group called the main farmer group. The main farmer group is located in Baumata village, Taebenu sub-district, Kupang district. This farmer group has used appropriate technology in the form of a hydram pump. The Hydram Pump, which is located in Baumata village is a product of the LP2M through the Mechanical Engineering Study Program, Faculty of Science and Engineering in 2018and is still running and is still being used by farmer groups. Based on the survey and coordination of the implementation team to the location until December 2019, it was concluded that there was a need for field activities in the context of training activities for members of farmer groups on how to repair, maintain and deal with pump problems which decrease productivity and aspects of pump work functions accordingly with a description of the report of the members of the Farmer Group.
Studi Eksperimen Kinerja Penukar Kalor Kompak Sebagai Pemanas Tambahan di Rumah Pengering Hibrid Sherly Satriani Ludji; Matheus M. Dwinanto; Verdy A. Koehuan
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The process of drying a hybrid system that uses a combination of solar energy and biomass contains some useful heat in the chimney of the biomass stove. This heat waste has a high enough temperature so that with the help of a compact heat exchanger it can be used as an additional heater. The purpose of this study was to analyze the performance of a cross-flow type discrete flat plate-finned tube compact heat exchanger with an inline tube arrangement which is used as an additional heating device in the hybrid dryer housing. The test was carried out at 10.00-15.00 for three days of testing with variations in air flow velocity of 1.3 m/s, 1.6 m/s and 1.8 m/s while the velocity of water flow in the pipe was considered constant with 0.000168 m/s. s and the air flow velocity in the exhaust fan is kept constant at 1 m/s. The results of this study indicate that the overall heat transfer coefficient is strongly influenced by the effectiveness of the heat exchanger, and with the increase in the effectiveness of the heat exchanger, the heat transfer coefficient will also increase. The highest overall heat transfer coefficient was obtained on the second day, namely 99.263 W/m2.oC. The total heat transfer rate is influenced by the effectiveness of the heat exchanger but at a certain value both values ​​tend to be stable due to the limited dimensions of the heat exchanger. NTU is very influential on the effectiveness of the exchanger, and in this case the value of NTU ranges from 0.6-0.8 while the effectiveness of the heat exchanger ranges from 46%-56%
Studi Eksperimen Rumah Pengering Umbi Porang Sistem Hibrid (Energi Surya–Biomassa) dengan Variasi Tebal Irisan Chip Verdy Ariyanto Koehuan; Abner Paulus Bai’oef; Matheus M. Dwinanto
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/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 %.
Studi Eksperimental Efisiensi Rumah Pengering Umbi Porang Sistem Hibrid (Energi Surya–Biomassa) dengan Variasi Beban Pengeringan Gurnawati Gurnawati; Putry P. E. Kameo; Verdy A. Koehuan
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/ljtmu.v9i02.9389

Abstract

Pengeringan adalah salah satu proses tahapan pasca panen yang penting mengingat proses ini menyerap cukup banyak energi. Diperkirakan 12% dari total energi yang digunakan pada industri pangan dan pertanian adalah untuk pengeringan. Salah satu alternatif pengeringan adalah menggunakan Solar Dryer sebagai sarana penangkap energi. Panas yang terakumulasi tersebut dipakai untuk mengeringkan Porang yang berada dalam Solar Dryer. Hasil penelitian menunjukkan bahwa kadar air akhir umbi porang setelah pengeringan per hari untuk tiap variasi beban diperoleh nilai terendah 9,90 %bb pada variasi beban 10 kg dan laju pengeringan tertinggi 0,550 kg/jam dari asumsi kadar air awal 70 %bb. Sedangkan pada variasi beban 8,5 kg (H1) dan 14 kg (H3), kadar air akhirnya masih memenuhi standar yaitu 11,4 %bb dan 10,98 %bb dengan laju pengeringan terendah 0,330 kg/jam (H3). Jika dikaitkan antara distribusi temperature maupun kelembaban udara dalam rumah pengering dengan laju pengeringan, konsumsi energi spesifik (KES), dan efisiensi pengeringan, maka terdapat perbedaan antar variable tersebut. Hal ini menunjukkan hasil perbandingan terbalik antara konsumsi energi spesifik, namun berbanding lurus dengan laju pengeringan dan efisiensi pengeringan
Rancang Bangun Mesin Peniris Minyak Untuk Proses Produksi Abon Ikan Ishak S. Limbong; Hendra Bin Doni; Verdy A. Koehuan
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/ljtmu.v9i02.9505

Abstract

Draining oil on fried foods is traditionally seen as less than optimal. In addition, it takes a longer time, however, the oil content in the food is still relatively high so that the food becomes less durable. This study aims to design and build a prototype of a rotary oil draining machine that utilizes centrifugal force which is able to drain oil faster with better results than the traditional method. The advantage of the design of the oil draining machine in this study is that the materials used to manufacture this machine are quite cheap and more effective than traditional draining machines. The stages of making this machine consist of the stages of designing, manufacturing, assembling and testing the machine. This machine is designed and built with specifications: 55 cm high, 78.5 cm long, 43.5 cm wide and the test results of this shredded fish oil draining machine reach a capacity of 29.50 kg/hour
Produksi Gas HHO melalui Perubahan Polaritas Sumber Listrik DC Jani F. Mandala; Verdy Ariyanto Koehuan; Matheus M. Dwinanto
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/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%.
Studi Eksperimen Tungku Biomassa pada Proses Pengeringan Chip Umbi Porang melalui Rumah Plastik Ultra-Violet (Solar Dryer) Sistem Hibrid Verdy A. Koehuan; Eflinda Milo; Defmit B. N. Riwu
ROTASI Vol 24, No 4 (2022): VOLUME 24, NOMOR 4, OKTOBER 2022
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.24.4.57-64

Abstract

This study aims to determine the performance of a biomass stove with coconut shell biomass as fuel for the drying process in a hybrid system dryer house. The method used is an experimental method by testing and analyzing the efficiency of the biomass furnace and the efficiency of the drying house on the variation of the initial mass of coconut shells in the gasification chamber. The test results show that the furnace efficiency or the highest gasification efficiency occurs in combustion with an initial mass of 15 kg of coconut shell, which is 6.18%. Meanwhile, the initial mass of 12 kg and 18 kg showed furnace efficiency of 4.07% and 4.66%, respectively. The efficiency of this biomass furnace is still low, because of the pyrolysis process, which takes place at a relatively low temperature with relatively slow combustion. In the process of drying porang tuber chips through an ultra-violet plastic housing (solar dryer) this hybrid system showed a drying efficiency of 9.58% and a drying house efficiency of 30.02%. The use of biomass heat energy is 9.96%, while the largest heat energy comes from solar radiation into the drying house of 89.11%.
Studi eksperimen rumah pengering ultra-violet (solar dryer) sistem hibrid tungku biomassa melalui variasi kecepatan aliran udara panas Verdy A. Koehuan; Margaretha Kewa Unarajan; Defmit B.N. Riwu; Muhamad Jafri
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol 4 No 1 (2023): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v4i1.3296

Abstract

The ultra-violet dryer integrated with the biomass furnace is a drying method with a forced mechanism. In this study, an experimental study was carried out. The drying process of porang tubers uses a hybrid system ultra violet plastic dryer (UV solar dryer) through varying the speed of the inlet air to obtain efficient drying results and porang tuber products. The results showed that the final moisture content of porang tubers after drying per day for each variation of air speed obtained the lowest value of 10.50%bb with the highest drying rate of 0.3373 kg/hour from the assumption of an initial moisture content of 70%bb, which occurs in variations airspeed of 1.8 m/s. while the speed is 1.3 m/s with the lowest drying rate of 0.330 kg/hour with a final moisture content of 11.74%.bb) Drying efficiency for variations in the speed of hot air flow into the hot air duct of the biomass furnace shows the highest value at a speed of 1.3 m/s of 16.76% with the lowest specific energy consumption (KES) of 51975.7 kJ/kg.
KOMBINASI UV SOLAR DRYER DAN SOLAR AIR HEATER UNTUK PENGERINGAN IKAN Gusnawati Gusnawati; Verdy A. Koehuan; Laurensius Longo Sogen
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 8 No 1 (2023): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v8i1.11829

Abstract

Fish as a source of animal protein is a fishery commodity that is prone to quality deterioration and spoilage after the fish is caught, so it needs fast, precise and correct handling to keep its quality in the hands of consumers. There for it is necessary to have a process that extends the durability through drying. One drying alternative is to use a Solar Air Heater with an Ultra Violet (UV) Solar Dryer drying house by making a building made of transparent material that functions as an insulator so that the solar irradiation trapped in the building will increase its temperature. The accumulated heat is used to dry the fish. Sardines that have just been displayed are put into the drying chamber with various loads of 22.23 kg, 14.82 kg and 7.41 kg. The energy source for drying is from sunlight with the Solar Air Heater system. The results show that drying efficiency and thermal efficiency increase with the addition of drying load. The highest values ​​of drying efficiency and drying house efficiency occurred at the mass load of 22.23 kg of fish at 13.17% and 50.57% with the lowest specific energy consumption (KES) of 18947.421 kJ/kg. The average temperature and temperature difference both in the solar air heater and in the drying chamber increase with the addition of the drying load. This temperature increase increases the drying rate which can reduce the drying time.
Penerapan Teknologi Irigasi Tetes pada Kebun Green House untuk Tanaman Hortikultura di Desa Bea Kakor, Kecamatan Ruteng, Kabupaten Manggarai Verdy A. Koehuan; Matheus M. Dwinanto; Dominggus. G.H. Adoe; Damianus Adar; Rima N. Selan
Journal Of Human And Education (JAHE) Vol. 3 No. 4 (2023): Journal Of Human And Education (JAHE)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jh.v3i4.413

Abstract

Pelaksanaan Program Kemitraan Masyarakat (PKM) dalam rangka mendorong peningkatan usaha budidaya produksi tanaman hortikultura di desa Bea Kakor, kecamatan Ruteng, kabupaten Manggarai, di propinsi Nusa Tenggara Timur, dilakukan dengan teknologi Sistem Irigasi Tetes (SIT) dalam kebun green house melalui pelaksanaan PKM Undana yang dilaksanakan pada bulan Mei–Juli tahun 2023. Kegiatan ini juga melibatkan Mahasiswa (6 orang dari prodi Teknik Mesin dan 1 orang dari prodi Agrobisnis) dalam kegiatan magang terintegrasi dan program KKN tematik Undana periode semester Genap tahun 2022/2023. Sistem irigasi tetes yang diaplikasikan menggunakan sistem gravitasi dimana air dari sumber dipompa ke tower penampung (1100 liter) kemudian dialirkan secara gravitasi ke setiap lajur tanaman, terdapat 6 lajur dengan panjang per lajur 5 m dengan jarak tanaman 0,3 m, sehingga terdapat 96 pohon tanaman yang ada dalam green house. Namun sebelumnya dialirkan melalui filter air irigasi tipe Y disk, venturi injector pupuk, pipa utama (PVC 1 inch), pipa pembagi (PVC 0,75 inch) dan selang drip (0,75 inch) serta selang piping (17 mm) ke setiap pohon (tanaman).
Co-Authors A. Riszal Abner Paulus Bai’oef Agustinus Sampealo Aloysius V.P. Piamat Damianus Adar Defmit B.N. Riwu Domi K. Dipa Dominggus Adoe, Dominggus Dominggus. G.H. Adoe Eflinda Milo Fransiskus L. H. Koten Fredrikus M. Bere Gurnawati Gurnawati Gusnawati Gusnawati Hendra Bin Doni Jahirwan Ut Jasron Jani F Mandala, Jani F Joy Ferdinand Ludji Kristianus Yosafat Goab Kristomus Boimau Laurensius Longo Sogen Laurensius Nogur Laurensius Nogur Margaretha Kewa Unarajan Matheus M. Dwinanto Meinase K Nabuasa Muhamad Jafri Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Phillips G. Taka Logo Putry P. E. Kameo Riky Yonerto Runesi Rima N. Selan Sam Budi Samsul Kamal Setiadi Wira Buana Sherly Satriani Ludji Sugiyono Sugiyono Suliha N. I. Neonufa Thomas J. Hudin Valens Tae Wenseslaus Bunganaen Wenseslaus Bunganaen Yeremias M. Pell Yoseph P. Ndeo