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All Journal Rekayasa Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Madaniya Multicience Archipelago Engineering Jurnal Pengabdian Masyarakat (ABDIRA) METIKS: Jurnal Teknik Mesin, Elektro, Informatika, Kelautan & Sains Jurnal ISOMETRI
Cendy Sophia Edwina Tupamahu
Pattimura University
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Pitch Pitch ratio effect on the effectiveness of condenser for essential oil distillation Nicolas Titahelu; Jonny Latuny; Cendy Sophia Edwina Tupamahu; Sefnath Josep Etwan Sarwuna
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 6 No. 2 (2021)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v6i2.19006

Abstract

This research is focused on the usage of the helical coil pipe to shorten the distillation time which then aimed to obtain a helical coil pipe condenser configuration with an effective pitch ratio to shorten the distillation time. The pitch ratio value is varied from 2.10 to 4.20. The experimental results show that the effectiveness of the condenser decreases as the pitch ratio increases, where the maximum effectiveness at the pitch ratio of 2.10 is 74.13%, while the minimum pitch ratio of 4.20 is 67.19%. The maximum effectiveness is obtained at a pitch ratio of 2.10 due to a larger heat transfer contact area which results in an increase in the actual heat transfer as well. The experimental results with a pitch ratio of 2.10 obtained a condensate temperature of 37.29 °C which is 22.71 °C and a distillation time of only 2 hours compared to the results of the straight pipe condenser used by the SME group. The effect of the helical coil pipe pitch ratio obtained from the experimental results with a mean deviation value of 2.81% compared to the numerical study. It is concluded that the maximum condenser effectiveness is at the minimum pitch ratio value and then the pitch ratio of 2.10 can be used for the clove essential oil distillation process.
Sosialisasi & Pelatihan EBT untuk Menciptakan Kemandirian Penyediaan Listrik Secara Mandiri Sefnath Josep Etwan Sarwuna; Wulfila Maximilian Rumaherang; Cendy Sophia Edwina Tupamahu
Jurnal Pengabdian Masyarakat (abdira) Vol 2, No 1 (2022): Abdira, Januari
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/abdira.v2i1.48

Abstract

Berbagai bentuk energi yang berkaitan langsung dengan masyarakat misalnya energi panas untuk memasak, energi listrik untuk penerangan dan peralatan listrik lainnya. Namun penggunaan energi listrik bagi masyarakat kurang mampu dari segi ekonomi tentu tidak dapat menggunakannya. Dusun Siahari di Pulau Seram dengan jarak lebih kurang 187 km dari pusat Provinsi Maluku yaitu Kota Ambon. Permasalahan yang dihadapi masyarakat Dusun Siahari adalah energi listrik terutama untuk rumah tinggal karena terbatasnya jangkauan listrik PLN. Salah satu potensi dusun Siahari adalah energi angin yang dapat digunakan sebagai Pembangkit Listrik Tenaga Angin. Berkaitan dengan hal tesebut tujuan kegiatan pengabdian masyarakat yaitu memberikan sosialisasi dan pelatihan untuk menciptakan kemampuan sebagai masyarakat Siahari mandiri energi.  Tahap awal dilakukan sosialisasi EBT dilanjutkan pelatihan sistem turbin, generator untuk memberikan pengetahuan keterampilan kepada masyarakat. Hasil kegiatan pengabdian masyarakat dusun Siahari dapat menghitung daya turbin, komponen turbin angin, perawatan turbin angin generator.
ANALYISIS OF THE EFFECT OF HEAT INLET VELOCITY ON CROSSFLOW FOR CHARACTERISTICS OF HEAT EXCHANGER SHELL AND TUBE CENDY S.E TUPAMAHU; SEFNATH J.E SARWUNA
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 1 No. 07 (2020): INTERNATIONAL JOURNAL OF MULTISCIENCE -OCTOBER EDITION
Publisher : CV KULTURA DIGITAL MEDIA

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

Abstract

The effect of the velocity (V) of the opposite flow and the temperature of the hot fluid inlet (Thi)on the characteristics of the shell and tube heat exchanger has been investigated with forcedconvection heat transfer and is applied to the design of oil coolers in aircraft, power generationunits and others. The test model is modified with hot fluid (oil) on the tube side and cold fluid(water) on the shell side. Experimental research was carried out with variations in velocity (V) =0.011 to 0.037m / s and hot fluid inlet temperature (Thi) = 363K to observe the characteristics ofthe heat exchanger along with increasing velocity (V) with a significant increasing gradient. Theresults of experimental research show that the increase in velocity (V) <0.037 m / s with the heatfluid intake temperature (Thi) 363 K, the heat exchanger characteristics increase, namely; Redhnumber is 23.29%, Nudh number is 34.52%, hi is 34.80%, Redc number is 28.36%, Nudc is36.95%, ho is 36.78%, U is 34.83%, q is 22.56% while efficiency (ɛ) is 71.79% at a speed (V)<0.024 m / s and a decrease in speed (V)> 0.024 m / s of 24.99
ANALISIS PENGARUH MASUKAN PANAS PADA OVEN PENGERING BUNGACENGKEH TERHADAP KARAKTERISTIK PERPINDAHAN PANAS KONVEKSI PAKSA Nicolas Titahelu; Cendy S Edwina Tupamahu
ALE Proceeding Vol 2 (2019): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.2.2019.108-114

Abstract

Abstrak Analisis pengaruh masukan panas (Q*) terhadap karakteristik perpindahan panas oven pengering bunga cengkeh telah diteliti dengan perpindahan panas konveksi paksa dan diaplikasikan untuk mendesain oven pengering bunga cengkeh guna menjawab kebutuhan masyarakat yang selama ini menggunakan cara pengeringan tradisional. Model uji dimodifikasi dengan memberikan saluran udara masuk dan keluar agar bilangan Nusselt meningkat dengan kecepatan udara (V) = 165.56 m/s konstan. Penelitian eksperimen dilakukan dengan variasi masukan panas (Q*) = 400 s/d 600 W, untuk mengamati karakteristik perpindahan panas konveksi paksa. Karakterik perpindahan panas konveksi paksa meningkat seiring dengan membesarnya masukan panas.Semakinmeningkat masukan panas untuk (Q*) < 550 W, maka karakteristik perpindahan panas konveksi paksa yakni lajuperpindahan panas heater (qh), laju perpindahan panas pelat (qp) dan efektiitas pelat (ep) semakin meningkat dengan gradient kenaikan curam, sedangkan laju perpindahan panas udara (qud), bilangan Reynolds (Re), bilangan Nusselt (Nu), koefisien konveksi (h) dan efektvitas panas udara (eu) semakin menurun dengan gradient penurunan curam. Untuk masukan panas (Q*) > 550 W laju perpindahan panas heater (qh), laju perpindahan panas pelat (qp) dan efektivitas panas pelat (ep) semakinmeningkat dengan gradien kenaikan landai, sedangkan laju perpindahan panas udara (qud), bilangan Reynolds (Re), bilangan Nusselt (Nu), koefisien konveksi (h) dan efektivitas panas udara (eud) semakin menurun dengan gradien penurunan landai. Semakinmeningkat masukan panas, maka waktu pengeringan cengkeh (tc,o) semakin menurun. Waktu pengeringan cengkeh (tc,o) dari 16 jam hingga 9 jam.
STUDI EKSPERIMENTAL PERFORMANCE KAVITASI WATERJET PROPULSI Wulfilla M. Rumaherang; J. Louhenapessy; Mesak F. Noya; Cendy S. Tupamahu
ALE Proceeding Vol 4 (2021): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.4.2021.112-120

Abstract

Cavitation is a complex phenomenon of dynamic processes in hydraulic machines that can cause a decrease in energy performance, vibration and damage the blade surfaces. Analysis of cavitation symptoms in hydraulic machines is carried out through cavitation performance studies, namely the relations between energy parameters. Each hydraulic machine has a critical value on a different cavitation performance curve. Therefore, a study of the effect of cavitation changes is needed to determine the working zone of hydraulic machines without cavitation. In this study, cavitation performance analysis was carried out on a waterjet propulsor model with 5 impeller blades and 7 stator blades using experimental methods. The cavitation coefficient was varied at σ = 2.25 to 0.25 by setting and controlling the inlet pressure on the cavitation test rig. The critical point value will be observed at the point where the thrust coefficient decreased to 3.28%. The results showed that cavitation begins at σ = 1, the critical point is obtained at σ = 0.75. From these studies, we find that waterjet must be operated at conditions where is σ > 0.75.
ANALISIS EFEKTIVITAS PENUKAR KALOR PIPA HELIKAL DESTILASI MINYAK ATSIRI KAYU PUTIH Antonius Hatumessen; Nicolas Titahelu; Cendy S. Tupamahu
ALE Proceeding Vol 4 (2021): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.4.2021.127-132

Abstract

The Eucalyptus plant is one of the essential oil-producing plants. Eucalyptus oil processing generally uses the distillation method. Traditionally used eucalyptus oil distillation uses a straight pipe condenser. The weakness of the straight pipe condenser is that the temperature of the condensate that comes out is still very high, this shows that the effectiveness of the straight pipe condenser is not optimal. To optimize the effectiveness of the distillation system condenser, a condenser with a helical pipe type condenser is designed in the essential oil distillation system. This study will vary the ratio of the pitch distance to the diameter of the condenser pipe, which aims to obtain an effective helical coil pitch ratio to optimize the effectiveness of the helical pipe condenser. This study uses the simulation method on COMSOL Multiphysics 5.4. The pitch ratio variant used is 2.1; 2.62; 3.15; 3.67; 4.2. The parameters that are constant in this study are the inlet fluid temperature on the tube side 373 K, the inlet fluid temperature on the shell side 288 K, the fluid inlet velocity on the tube side 0.2 m/s, and the fluid inlet velocity on the shell side 1 m/s. The results of the simulation by varying the pitch ratio show that the effectiveness increases as the pitch ratio value decreases, where the highest effectiveness is shown at pitch ratio of 2.1 which 75.9% and the lowest effectiveness is shown to pitch ratio of 4.2 which 70.7%.
KAJI PERFORMANSI REFRIGERAN R-290, R-32, DAN R-410A SEBAGAI ALTERNATIF PENGGANTI R-22 Rikhard Ufie; Cendy S. Tupamahu; Sefnath J. E. Sarwuna; Jufraet Frans
ALE Proceeding Vol 4 (2021): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.4.2021.133-139

Abstract

Refrigerant R-22 is a substance that destroys the ozone layer, so that in the field of air conditioning it has begun to be replaced, among others with refrigerants R-32 and R-410a, and also R-290. Through this research, we want to know how much Coefficient of Performance (COP) and Refrigeration Capacity (Qe) can be produced for the four types of refrigerants. The study was carried out theoretically for the working conditions of the vapor compression cycle with an evaporation temperature (Tevap) of 0, -5, and -10oC, a further heated refrigerant temperature (ΔTSH) of 5 oC, a condensation temperature (Tkond) of 45 oC and a low-cold refrigerant temperature. (ΔTSC) 10 oC and compression power of 1 PK . The results of the study show that the Coefficient of Performance (COP) in the use of R-22 and R-290 is higher than the use of R-32 and R-410a, which are 4,920 respectively; 4,891; 4.690 and 4.409 when working at an evaporation temperature of 0 oC; 4.260; 4,234; 4.060 and 3.812 when working at an evaporation temperature of -5 oC; and amounted to 3,730; 3,685; 3,550 and 3,324 if working at an evaporation temperature of -10 oC. Based on the size of the COP, if this installation works with a compression power of 1 PK, then the cooling capacity of the R-22 and R-290 is higher than the R-32 and R-410a, which are 3,617 respectively. kW; 3,597 kW; 3,449 kW and 3,243 kW. If working at an evaporation temperature of 0 oC; 3.133 kW; 3.114 kW; 2,986 kW and 2,804 kW if working at an evaporation temperature of -5 oC; and 2,741 kW; 2,710 kW; 2,611 kW and 2,445 kW if working at an evaporation temperature of -10oC.
Pengaruh Laju Aliran Fluida Helical Coil Terhadap Efektivitas Kondensor Minyak Atsiri Cengkeh Berbasis Shell Cendy S. E. Tupamahu; Sefnath J. E. Sarwuna
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 3 Nomor 2 Tahun 2021
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v3i2.2298

Abstract

One of the main tools in the process of making essential oils is a condenser. The simple use of condensers is still used for essential oil processing by small business groups of Clove essential oil in Suli Village, Central Maluku. This is what encourages this research to be carried out. This research includes designing and testing the condenser model using COMSOL Multiphysics 4.5 Software to determine the optimal efficiency of the condenser by varying the mass flow rate of cold fluid on the shell side. The condenser used in this study is a helical coil condenser where hot fluid flows on the tube side and cold fluid flows on the shell side. Tube and shell materials are made of stainless steel 304, with a tube diameter of 1.905 cm, shell diameter 30 cm, shell height 57 cm, coil diameter 24 cm, coil height 50 cm. mass flow rate variations of 0.25, 0.51, 0.76, 1.01, and 1.26 kg / s. The results showed that the effectiveness of the condenser was effective at the mass flow rate m ̇ = 1.26 kg/s where the effectiveness (ɛ) was 91%.
Pengaruh Temperatur Fluida Panas Masuk Terhadap Karakteristik Penukar Panas Shell and Tube Cendy S E Tupamahu; Costantinus Narmo
Journal Teknik Mesin, Elektro, Informatika, Kelautan dan Sains Vol 1 No 1 (2021): Jurnal Teknik Mesin, Elektro, Informatika, Kelautan dan Sains
Publisher : Jurusan Teknik Mesin Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.465 KB) | DOI: 10.30598/metiks.2021.1.1.9-16

Abstract

Abstrak Penukar panas yang sering digunakan dalam aplikasi rekayasa industri yakni tipe shell and tube. Laju aliran massa yang berada pada penukar panas juga mempengaruhi karakteristik daripada penukar panas tersebut. Semakin tinggi laju aliran massa berlawanan berati waktu kontak kedua fluida semakin singkat. Berangkat dari kondisi ini, disusun hipotesa bahwa kenaikan laju aliran massa berlawanan akan meningkatkan karakteristik suatu penukar panas. Eksperimen dilakukan untuk menganalisa pengaruh variasi temperatur masuk fluida panas pada kecepatan fluida konstan terhadap karakteristik perpindahan panas penukar panas tipe shell and tube. Penelitian ini diameter shell 4 inch dan diameter tube 3/8 inch dengan 8 laluan, Aliran fluida dingin mengalir dalam sisi shell dan aliran fluida panas mengalir dalam tube dengan laju aliran massa konstan 0.024 m/s dengan variasi temperatur masuk fluida panas (Thi) adalah 323oK, 333oK, 343oK, 353oK, 363oK. Peningkatan temperatur fluida panas masuk (Thi) dengan kecepatan (V) konstan mempengaruhi karakteristik penukar panas seperti bilangan Reynold (Red), bilangan Nusselt (Nud), koefisien konveksi (h), koefisien perpindahan panas menyeluruh (U), dan laju perpindahan panas (q) yang meningkat tidak signifikan pada (Thi) 363K dan min pada temperatur masuk fluida panas (Thi) 323K. (ɛ) penukar panas max pada Thi 323K dan kemudian turun 1% pada Thi 353K .
PEMILIHAN MODEL DAN OPTIMASI KAPAL IKAN UNTUK JENIS TANGKAPAN DI PERAIRAN PULAU AMBON Billy Jhones Camerling; Sefnath J. E. Sarwuna; Cendy S. E. Tupamahu
ALE Proceeding Vol 5 (2022): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.5.2022.12-17

Abstract

Kapal penangkap ikan yang dipergunakan di perairan Maluku dapat diklasifikasi ada empat jenis yang sangat produktif yatu kapal long line, kapal pole and line, kapal purse sine dan kapal pancing tonda/troll line. Dari data yang ada kapal tangkap jenis purse siner menghasilkan rata-rata hasil tangkapan 17.290 ton/tahun ; 4509 trip/tahun dan CPUE 9 ton/tahun , sedangkan kapal long line dan kapal pole and line menghasilkan rata-rata hasil tangkapan 58,535 ton/tahun ; 40 trip/tahun ; CPUE 42,761 ton/tahun. Data ini mengindikasikan bahwa terjadi ketidakseimbangan antara jumlah armada yang ada dengan sumber daya yang tersedia terutama pada jenis kapal tangkap purse siner. Penelitian ini bertujuan untuk membuat model pemilihan, analisis sensitifitas dan model optimasi alat penangkapan ikan tuna dan cakalang dari empat jenis armada penangkapan ikan tuna yang ada . Model yang dikembangkan adalah proses hirarki analitik untuk pemilihan dan programasi tujuan ganda untuk optimasi alat penangkapan ikan. Dari hasil perhitungan dengan Expert Choice Version 9.0 diperoleh tipe alat penangkapan Ikan tuna dan cakalang yang paling sesuai untuk jenis tangkapan ikan tuna dan cakalang di perairan pulau Ambon adalah Pole and line. Selanjutnya jenis armada yang dapat dioptimalkan jumlahnya yaitu kapal jenis pole and line sebesar 125 kapal, long line 39 kapal, purse siner sebesar 47 kapal dan harus dibatasi dan tidak perlu diadakan lagi yaitu troll and line atau pancing tonda yang jumlahnya sudah sangat bayak karena memberikan nilai 0 kapal dari hasil optimasi. sedangkan jumlah tenaga kerja yang bisa diserap dari keseluruhan jumlah armada hasil optimasi sebanyak 211 kapal yaitu 5235 ABK. Hasil optimasi juga diperoleh bahwa dana pemerintah untuk membantu pengoptialan armada dapat dimanfaatkan semua secara optimal.
Co-Authors A. Y. Leiwakabessy Ajit Tuasikal Ammar F Rumagutawan Antonius Hatumessen Benjamin G Tentua Billy Jhones Camerling Corie Fany Refwalu Costantinus Narmo Danny Samuel Pelupessy Edwina Jerusalem Rumaherang Frans Silooy Indah Juanda Purnama Sari Sileuw J. Louhenapessy Jonny Latuny Jufraet Frans M. Mas’ud Tohepaly Mesak F. Noya Nicolas Titahelu Nicolas Titahelu R. Ufie Ratih Puspitasari Rikhard Ufie Sefnath J. E. Sarwuna SEFNATH J.E SARWUNA Sefnath Josep Etwan Sarwuna Titahelu, Nicolas Wulfila Maximilian Rumaherang Wulfilla M. Rumaherang Wulfilla Maxmilian Rumaherang