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All Journal Sinergi Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin METIKS: Jurnal Teknik Mesin, Elektro, Informatika, Kelautan & Sains
Wulfilla Maxmilian Rumaherang
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Pattimura
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics

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 1 
FLUID FLOW STUDY IN VARIOUS SHAPES AND SIZES OF HORIZONTAL AXIS SEA CURRENT TURBINE Wulfilla Maxmilian Rumaherang; Jonny Latuny
SINERGI Vol 25, No 3 (2021)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2021.3.006

Abstract

The ducted tidal turbine models have been developed to utilize the conversion of the kinetic energy on ocean currents. The research in refining the turbine characteristics has been carried out by modifying the turbine’s shape and size. This study investigated flow characteristics in the meridional section of five ducted turbines models for seawater flow with velocity U0 = 1.5 m/s. The ducted turbine design and construction have five different impeller house diameters and fixed inlet and outlet diameters. The potential energy flow theory and experimental data are used to analyze the flow characteristics of the model. The results show that flow velocity in the x-direction at the inlet and outlet cross-section is getting smaller, reducing the impeller house cross section. Each impeller house size reduction increases the flow speed in the impeller house cross-section and also pressure on all other cross-sections tested. In the inlet area, the increased pressure indicates a decrease in speed flow and discharge coefficient value. The discharge coefficient value decreases from CQ = 0.9 at the diameter ratio of dr = 1 to CQ = 0.56 at the diameter ratio of dr = 0.375. The maximum value of power coefficient was determined at dr = 0,61÷0.73 or dr = 0.69 which is equivalent to average internal flow velocity Vr =2.0÷2.6 m/s and the static pressure ps = 97.1÷ 94.4 kPa. At the ratio value of D0/D2 = 0.83, the optimal diameter ratio dropt=0,61÷0.73 is in line with the duct model of case 3 and case 4, but it may be determined solely as for case 4.
KAJIAN PERBANDINGAN PERFORMANCE ENERGI TURBIN ANGIN MODEL DUCTED DENGAN UN-DUCTED Wulfilla Maxmilian Rumaherang; Billi Laconawa; Nicolas Titahelu; Jandri Louhenapessy
Journal Teknik Mesin, Elektro, Informatika, Kelautan dan Sains Vol 2 No 1 (2022): 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 (670.891 KB) | DOI: 10.30598/metiks.2022.2.1.56-64

Abstract

Abstrak. Pengurangan emisi karbon dioxida secara signifikan sampai dengan 28% pada tahun 2030 menjadi isu penting sehingga diperlukan inovasi dan pemanfaatan energi angin sebagai salah sumber energi baru terbarukan hijau. Ada dua jenis tipe turbin angin dengan selubung (ducted) dan turbin angin aliran bebas (un-ducted). Aplikasi kedua turbin ini pada PLTB akan memberikan performance yang berbeda. Berapa perbedaan nilai parameter-parameter energi pada kedua turbin ini menjadi masih menjadi permasalahan dan fokus penelitian. Penelitian ini dilakukan untuk menentukan perbandingan performance energi dari kedua model turbin tersebut dengan diameter impeller DM= 1 meter dengan menggunakan profil blade NACA 63-412. Penelitian ini dilakukan melalui pengujian di laboratorium pada variasi kecepatan angin 2 – 8 m/s. Nilai momen diperoleh melalui pembebanan bertahap pada prony break sampai putaran mencapai nilai yang telah ditentukan atau dihitung sebelumnya. Hasil penelitian parameter-paremeter energi menujukan bahwa peformance pada turbin angin dengan selubung (ducted wind turbine) lebih tinggi dari turbin angin tanpa selubung (un-ducted wind turbine). Nilai kenaikan daya turbin dengan selubung (ducted wind turbine) untuk kecepatan 2 – 8 m/s berkisar pada nilai Pducted = (0 – 2.5)Pun-ducted, Sehingga dari aspek konversi energy direkomendakian penggunaan turbin angin ducted.
EVALUASI KINERJA POMPA SENTRIFUGAL BERKAPASITAS 600 KL/Hr PADA SISTEM PEMOMPAAN MINYAK Wulfilla Maxmilian Rumaherang; Corie Fany Refwalu; Cendy Sophia Edwina Tupamahu; Sefnath Josep Etwan Sarwuna; Edwina Jerusalem Rumaherang
Journal Teknik Mesin, Elektro, Informatika, Kelautan dan Sains Vol 3 No 1 (2023): Jurnal Teknik Mesin, Elektro, Informatika, Kelautan & Sains
Publisher : Jurusan Teknik Mesin Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/metiks.2023.3.1.17-27

Abstract

Pompa sentrifugal adalah pompa dengan efisiensi tinggi, konstruksi sederhana dan banyak digunakan di dunia. Pompa sentrifugal modern saat ini beroperasi dengan efesiensi lebih dari 70% pada berbagai nilai putaran. Namun kesesuaian kerja dengan sistem pemompaan merupakan masalah penting dalam engineering dimana pompa harus dipilih sesuai kebutuhan sistem sehingga dapat bekerja dengan baik dan effisien. Pemilihan dan pengoperasian pompa untuk aplikasi didasarkan pada kurva karakteristik yaitu hubungan antara head (H), daya (P) dan efesiensi (η) terhadap debit (Q) dan kesesuaiannya dengan system pemompaan. Berapakah nilai optimal kinerja pompa dan sistemnya merupakan masalah utama riset ini yang harus diselesaikan dengan tujuan menentukan kondisi optimal kerja pompa dan sistem pemompaan. Analisis dilakukan secara teoritis dan membandingkan hasilnya dengan data lapangan yang tersedia. Secara teoritis pompa kondisi optimum dimana parameter-parameter operasi berada pada nilai efesiensi pompa maksimum yaitu 70%, dimana head optimum pompa berada pada nilai Q/Qd =1,28 atau pada nilai debit Q = 0,054 m3/s, daya yang diberikan oleh pompa pada titik ini mencapai maksimum. Karena hasil perhitungan head pompa menunjukan hasil yang hampir mendekati nilai head aktual hasil pengamatan, sehingga dapat disimpulkan bahwa hasil perhitungan teoritis dapat digunakan sebagai pertimbangan dalam perencanaan dan operasi sistem pemompaan.
Pengaruh rasio diameter terhadap parameter-parameter energi turbin arus laut horizontal Rumaherang, Wulfilla Maxmilian
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (815.253 KB) | DOI: 10.29303/dtm.v10i1.306

Abstract

The ducted tidal turbine models have been developed to utilize convertion of the kinetic energy on ocean currents. The research on refining the turbine characteristics has been carried out by modifying the turbine’s shape and size. The study of the duct diameter ratio effect on the energy characteristics of the turbine was done in this work. This study was conducted by modifying the duct diameter ratio () with the constant inlet diameter D0 and outlet D2. The flow conditions are analyzed for five cases of turbines with different shapes and diameters to determine the optimum conditions. The optimum value of the diameter ratio could be obtained at the maximum value of power coefficient CP. Flow velocity in the ducted turbine was measured at three turbine sections, namely; the inlet section, the impeller housing section, and the outlet section. The measurement of flow in turbines was carried out at the free stream velocity U0 = 1,5 m/s. The power coefficient CP and thrust coefficient CT were calculated based on flow velocity data on the turbine cVennell sections for each case. The power coefficient CP reaches the maximum value (Betz limit) at the resistance coefficient K = 2 and the value of axial induction factor a = 0,37. These values were founded at diameter ratio d=0,66.  The value of thrust coefficient CT reaches the maximum value at K = 3,9, a = 0,53 and . The optimum value of the diameter ratio was founded at d=0,69.
Pengaruh rasio diameter terhadap parameter-parameter energi turbin arus laut horizontal Rumaherang, Wulfilla Maxmilian
Dinamika Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v10i1.306

Abstract

The ducted tidal turbine models have been developed to utilize convertion of the kinetic energy on ocean currents. The research on refining the turbine characteristics has been carried out by modifying the turbine’s shape and size. The study of the duct diameter ratio effect on the energy characteristics of the turbine was done in this work. This study was conducted by modifying the duct diameter ratio () with the constant inlet diameter D0 and outlet D2. The flow conditions are analyzed for five cases of turbines with different shapes and diameters to determine the optimum conditions. The optimum value of the diameter ratio could be obtained at the maximum value of power coefficient CP. Flow velocity in the ducted turbine was measured at three turbine sections, namely; the inlet section, the impeller housing section, and the outlet section. The measurement of flow in turbines was carried out at the free stream velocity U0 = 1,5 m/s. The power coefficient CP and thrust coefficient CT were calculated based on flow velocity data on the turbine cVennell sections for each case. The power coefficient CP reaches the maximum value (Betz limit) at the resistance coefficient K = 2 and the value of axial induction factor a = 0,37. These values were founded at diameter ratio d=0,66.  The value of thrust coefficient CT reaches the maximum value at K = 3,9, a = 0,53 and . The optimum value of the diameter ratio was founded at d=0,69.
Co-Authors Billi Laconawa Cendy Sophia Edwina Tupamahu Corie Fany Refwalu Edwina Jerusalem Rumaherang Jandri Louhenapessy Jonny Latuny Latuny, Jonny Nicolas Titahelu Sefnath Josep Etwan Sarwuna