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All Journal Rotasi R.E.M (Rekyasa Energi Manufaktur) Jurnal Jurnal Kreativitas PKM PEDULI: Jurnal Imiah Pengabdian Pada Masyarakat Indonesian Journal of Community Dedication Piston: Journal of Technical Engineering Indonesian Journal of Education and Mathematical Science Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Journal of Applied Science, Engineering, Technology, and Education International Journal of Marine Engineering Innovation and Research Jurnal Bakti Masyarakat Indonesia Journal La Multiapp Indonesian Journal of Innovation Studies Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Journal of Mechanical Engineering, Science, and Innovation Eduvest - Journal of Universal Studies Madani : Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Unimus Nemui Nyimah
Damora Rhakasywi
Departement Of Mechanical Engineering, Universitas Pembangunan Nasional “Veteran” Jakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation Other

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PEMANFAATAN ENERGI PANEL SURYA DAN MARINE LOCATOR UNTUK PERAHU NELAYAN DESA PULO AMPEL Marasabessy, Amir; Rhakasywi, Damora; Sulistyawati, Wiwin; Widiyanto, Didit; Ashfi Rayhan, Fajri
Jurnal Likhitaprajna Vol 9 No 1 (2025)
Publisher : FKIP Universitas Wisnuwardhana

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

Abstract

Desa Pulo ampel, berada di pesisir utara Pulau Jawa di Kecamatan Pulo ampel. Berdasarkan geografis berada di bagian timur, terbentang dari utara ke selatan ± 3 Km. Masyarakat sebagian besar menjadi nelayan, memiliki perahu ikan diantaranya 33 unit berkapasitas 3 Gross Tonnage (GT). Jumlah nelayan 215, Perahu ikan kapasitas 3 GT beroperasi dari malam hingga pagi hari menggunakan penerangan dari sumber baterai, baterai sering mengalami kerusakan karena buka pasang untuk charge di kota dengan harga mahal. Keberadaan nelayan di areal fishing ground menjadi cemas keluarga terutama saat cuaca buruk. Hal ini mengganggu pengoperasian perahu ikan sehingga berdampak menurunya produksi dan pemasaran hasil tangkapan ikan. Tujuan Pengabdian Kepada Masyarakat adalah memanfaatkan energi panel surya untuk penerangan pada perahu ikan 3 GT dan marine locator untuk menegtahui posisi nelayan di areal fishing ground. Metode yang digunakan adalah penyuluhan, pelatihan, pendampingan perawatan dan evaluasi kinerja panel surya dan marine locator dengan melibatkan mitra nelayan agar kedepan dapat melakukan pemasangan dan perawatan secara mandiri. Hasil kegiatan Pengabdian Kepada Masyarakat diharapkan dapat memberikan kelancaran dan keselamatan dalam pengoperasian mencari ikan, sehingga produksi dan pemasaran hasil tangkapan ikan meningkat dari 7 s/d 12 kg/hari menjadi 10 s/d 15 kg/hari guna peningkatan ekonomi dan kesejahteraan mitra nelayan.
IMPLEMENTASI BRANDING KAMPUNG CIGUNDI DESA MEKARAGUNG LEBAK BANTEN SEBAGAI DESA WISATA TANI BERBASIS TEKNOLOGI INFORMASI Zuchriadi, Achmad; Rhakasywi , Damora; Sitorus, Henri BH
Nemui Nyimah Vol. 1 No. 1 (2021): Nemui Nyimah
Publisher : FT Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/nm.v1i1.4

Abstract

Kampung Cigundi di Desa Mekaragung Lebak Banten yang mayoritas warganya berprofesi sebagai petani memiliki suatu keunikan, yaitu adanya kolaborasi antara suami dan istri dalam upaya peningkatan perekonomian keluarga dimana para suami tergabung dalam Kelompok Tani Surya Tani (KST), kelompok tani yang memanfaatkan lahan untuk bercocok tanam khususnya menanam singkong. Sedangkan para istri dan anak-anak tergabung dalam Kelompok Wanita Tani (KWT) Pagoda yang memanfaatkan singkong hasil panen para suami menjadi produk unggulan kripik enye-enye. Kerjasama unik ini berpotensi menjadikan Kampung Cigundi sebagai Desa Wisata Tani. Sayangnya keunikan dan informasi tentang keberadaan Kampung Cigundi sangat minim baik secara fisik seperti petunjuk arah maupun non fisik seperti di mesin pencari Google. Kegiatan Pengabdian Masyarakat ini bertujuan melakukan Branding Kampung Cigundi sebagai Desa Wisata Tani berbasis teknologi informasi dengan membuat website dan media sosial Facebook dan Instagram Kampung Cigundi agar informasi keunikan dan keberadaan Kampung Cigundi mudah ditemukan di mesin pencari Google. Pada akhir kegiatan Pengabdian Kepada Masyarakat ini, website dan media sosial Facebook dan Instagram Kampung Cigundi telah masuk halaman pertama pencarian google dengan kata kunci kampung cigundi.
PELATIHAN PERAWATAN ZONA LAMBUNG PERAHU IKAN BERBAHANKAYU BAGI KELOMPOK NELAYAN DESA LONTAR KECAMATAN TIRTAYASA KABUPATEN SERANG Marasabessy, Amir; Sudjasta, Bambang; Rhakasywi, Damora
Nemui Nyimah Vol. 1 No. 2 (2021): Nemui Nyimah
Publisher : FT Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/nm.v1i2.12

Abstract

Pengabdian kepada masyarakat sangat membantu bagi kehidupan masyarakat untuk memperbaiki taraf kehidupan perekonomian agar bisa menjadi sejahtera. Kehidupan masyarakat Desa Lontar lebih didominasi oleh mitra kelompok nelayan dengan jumlah 1327 orang dan petani rumput laut 1021 orang. Hasil produksi penangkapan ikan dapat dikatakan belum maksimal jika dibandingkan dengan luas perairan 11.134,224 Km2 dan panjang garis pantai 517,42 Km. Saat ini mata pencaharian masyarakat Desa Lontar sebagian besar sebagai nelayan yang setiap hari mencari ikan untuk memenuhi kebutuhan hidup, perahu ikan yang digunakan berbahan kayu dengan kondisi phisik 40-50 % telah mengalami degradasi, dengan jumlah perahu ikan ± 100 unit. Aspek penting yang mendapat perhatian adalah sebagian besar perahu ikan tidak melaut karena sering terjadi kerusakan/kebocoran zona lambung ± 3 – 4 kali dalam setahun. Tujuan pelaksanaan PKM adalah memberikan pelatihan perawatan zona lambung perahu ikan berbahan kayu menggunakan bahan fiberglass. Metode yang digunakan adalah pendampingan pelatihan dengan melibatkan mitra kelompok nelayan, sebagai upaya transfer ilmu dan teknologi perawatan zona lambung perahu ikan berbahan kayu secara aplikatif. Hasil dari kegiatan Program Kemitraan Masyarakat, mitra kelompok nelayan dapat melakukan perawatan zona lambung perahu ikan secara mandir/kelompoki untuk menghindari kerusakan/kebocoran dan mempertahankan kekuatan zona lambung guna kelancaran dan keselamatan mencari ikan di laut.
Analysis of the Effect of Thermal Condition Parameters on the Strength of the Coil Lifting C-Hook Using the Finite Element Method (Case Study at PT. X) Imron, Raja Shadam Ali; Pradana , Sigit; Rhakasywi , Damora
Eduvest - Journal of Universal Studies Vol. 5 No. 11 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i11.52379

Abstract

In the steel industry, Coil Lifting C-Hooks are used to lift high-temperature wire rods after rolling. The main challenge with this tool is repeated loading and high temperatures, which affect its structural strength. This study uses Finite Element Method (FEM) simulation in ANSYS to analyze the impact of repeated loading and high temperatures on structural strength parameters at temperatures of 170°C and 200°C. The simulation was conducted using steady-state thermal analysis and followed by static structural analysis. The results show that repeated loading and increased temperature increase deformation (maximum 2.4358 mm) at 170°C and (maximum 2.425 mm) at 200°C, von-Mises stress (maximum 140.86 MPa) at 170°C and (maximum 158.53 MPa) at 200°C, and reduced fatigue life (minimum 2,286,900 cycles) at 170°C and (minimum 1,394,500 cycles) at 200°C, as well as the safety factor (minimum 1.0954) at 170°C and (minimum 0.973) at 200°C, particularly in the C-Hook curved area. This underscores the importance of C-Hook design that accounts for thermal effects.
The Effect of Cover Glass Thickness on the Performance of Box-Type Solar Cookers: Pengaruh Ketebalan Kaca Penutup Terhadap Performa Kompor Surya Tipe Kotak Muhammad Naufal Bari; Damora Rhakasywi; Fahrudin
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1787

Abstract

Kompor surya memiliki potensi dalam pemanfaatan energi Surya di bidang peralatan rumah. Pancaran energi yang tidak bisa dikendalikan oleh manusia menjadikan komponen kompor yang digunakan harus dibuat optimal agar memanfaatkan energi secara maksimal. Penelitian ini membandingkan performa kompor surya ketika menggunakan ketebalan kaca penutup yang berbeda, yaitu 3mm, 5mm, 8mm. Metode yang digunakan adalah uji coba lapangan dengan kondisi stagnan dan beban memasak air 1kg. Hasil dari penelitian ini adalah penggunaan kaca ketebalan 5 mm menghasilkan suhu maksimal tertinggi, yaitu 148,25 oC dibanding ketebalan 3 mm dan 8 mm, yang masing masing mendapatkan angka 124,25 oC dan 109,5 oC pada kondisi tanpa beban, sedangkan uji coba masak menghasilkan suhu maksimal 98 oC pada 3mm, 101,25 oC pada 5mm, dan 79,5 oC pada 8mm
Analysis of Cooling Load Performance with CLTD Method Case Study: Al-Furqon Mosque Dewanto, Ramadhan Haryo; Fahrudin; Rhakasywi, Damora
Piston: Journal of Technical Engineering Vol. 9 No. 2 (2026)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v9i2.56548

Abstract

Thermal comfort in worship spaces is an important aspect that affects the quality of religious activities. However, intermittently occupied worship spaces, such as mosques during Jummah prayers, often experience spikes in heat load due to the accumulation of sensible and latent heat from occupants and solar radiation. This study aims to analyze the actual cooling load and determine the cooling load required to achieve a comfortable room temperature based on the Cooling Load Temperature Difference (CLTD) method. Temperature measurements were taken using data loggers at one outdoor point and nine indoor points during five Fridays between October 10 and November 7, 2025, from 11:00 a.m. to 1:00 p.m. Western Indonesian Time. Cooling load calculations were based on occupancy variations of 100, 300, and 600 people and comfort temperature targets of 23°C, 25°C, and 27°C. The results showed that the temperature in the worship hall was well above the thermal comfort limit. The actual cooling load increased significantly between 12:00 p.m. and 1:00 p.m. WIB and during peak occupancy, reaching a peak load of 570,116.3 Btu/h. To achieve a comfortable room temperature, the cooling capacity needs to be increased by 8–35%. The final capacity recommendation based on the measurements and ASHRAE standards ranges from 44–69 TR. It can be concluded that the cooling system of Al-Furqon Mosque is currently under capacity and requires increased capacity and adaptive operational strategies to achieve thermal comfort in intermittently occupied worship spaces in a tropical climate.
Investigating the Impact of Plain Flap as Lift Enhancement on Symmetrical Airfoils Yohanes Mangatur Parluhutan; Fahrudin Ulwani; Damora Rhakasywi
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 1 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i1.5050

Abstract

Symmetric airfoils like NACA 0015 have limitations in generating lift compared to asymmetric airfoils. Therefore, additional devices are needed to overcome this limitation. This research analyzes the use of a lift enhancement device called a plain flap, which is installed on the trailing edge of the NACA 0015 airfoil using the CFD method. Simulations were conducted at a Reynolds number of using the k-epsilon turbulent model. Three variations of geometry models were simulated: the NACA 0015 airfoil without a flap, the NACA 0015 airfoil with a plain flap at a deflection angle of 15°, and the NACA 0015 airfoil with a plain flap at a deflection angle of 30°. The simulation results show that the use of a flap can increase the maximum lift coefficient (Cl) of the airfoil. Initially, the maximum lift coefficient was 1.15 at an angle of attack (AoA) of 15°. With a plain flap deflection angle of 15°, the maximum lift coefficient increased to 1.5 at an AoA of 13°. With a plain flap deflection angle of 30°, the maximum lift coefficient further increased to 1.71 at an AoA of 10°. However, the use of a plain flap also leads to a significant increase in drag. On average, the drag coefficient (Cd) increased by 65% with a plain flap deflection angle of 15° and by 178% with a plain flap deflection angle of 30°.
Numerical Study of Fillet Effects on Cavitation Development in Double Contraction Pipes Daris Naufal, Ridwan; Rhakasywi, Damora; Fahrudin, Fahrudin
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 3 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i3

Abstract

Comparative Study of Secant Method and Newton-Raphson Method in Finding the Molar Volume Value of Gas Using Python Juwariyah, Tatik; Rhakasywi, Damora; Janan, Syifaul; Melati, Asih
Indonesian Journal of Education and Mathematical Science Vol 7, No 2 (2026)
Publisher : Universitas Muhammadiyah Sumatera Utara (UMSU)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/ijems.v7i2.29468

Abstract

Determining the molar volume of a real gas requires solving the nonlinear Van der Waals equation. This study aims to compare the efficiency and accuracy of the Newton-Raphson method and the Secant method in solving the Van der Waals equation using the Python programming language. The case study examines the determination of the molar volume of methane gas at a pressure of 56 atm and a temperature of 450 K. The comparison parameters used are the number of iterations and the speed of convergence with an error tolerance of 10⁻⁷. The results show that the Newton-Raphson method requires fewer iterations, namely 4, with a computational time of 0.00012 s. In contrast, the Secant method requires more iterations, namely 6, and a computational time of 0.00015 s. The Newton-Raphson method is less practical because it necessitates the calculation of the derivative of the function, whereas the Secant method is more practical for application in Python scripts as it only requires the calculation of the Van ders Waals equation function.
Numerical Study of Thermal Hydraulic Performance Improvement in Double Pipe Heat Exchangers Using Different Corrugated Tube Geometries Al Ghazi, Muhammad Hisyam Haidar; Rhakasywi, Damora; Fahrudin, Fahrudin
Journal of Mechanical Engineering, Science, and Innovation Vol 6, No 1 (2026): (April)
Publisher : Institut Teknologi Adhi Tama Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2026.v6i1.8748

Abstract

Enhancing thermal efficiency in double-pipe heat exchangers has become a key industrial priority to reduce energy consumption, with passive methods such as pipe geometry modification receiving significant attention. This study investigates the comprehensive thermal and hydraulic performance of concave corrugated tubes (CCT) with triangular, square, and trapezoidal profiles. A three-dimensional numerical simulation was employed, utilizing the finite volume method and the SST k-ω turbulence model over a Reynolds number range of 7700 to 13,800. The results indicate that all CCT geometries improve thermal performance compared to plain tubes, with the square profile showing the highest increase in Nusselt number (13.87–16.59%). This enhancement is attributed to higher turbulence intensity, which, however, also results in the greatest hydraulic penalty due to dominant form drag. Performance Evaluation Criteria (PEC) analysis yielded values above 1 for all geometries, with the square profile being optimal at lower Reynolds numbers, whereas the triangular profile outperformed the others at higher flow rates (Re 12,300), with a PEC value of 1.023. In conclusion, corrugated geometries have been shown to enhance thermal performance, but the associated hydraulic penalties necessitate careful selection based on the operational flow range to achieve an optimal balance between heat-transfer gains and pumping-power requirements.
Co-Authors Abhitah, Athallah Nabiel Achmad Zuchriadi Al Ghazi, Muhammad Hisyam Haidar Amir Marasabessy Armansyah Armansyah Ashfi Rayhan, Fajri Asih Melati Asrianti, Nadia Putri Bambang Sudjasta Bambang Sudjasta Bambang Sudjasta Budhi Martana Christoforus Deberland Daris Naufal, Ridwan David, Jerico Dewanto, Ramadhan Haryo Dewi, Talitha Cahya Kemala Didit Widiyanto Diraharja, Rifat Satrio Dora Samaria fahrudin Fahrudin Fahrudin Fahrudin Ulwani Fahrudin, Fahrudin Fajri Ashfi Rayhan Febriana, Miftakhul Jannah Francisco, Jeremi Harinaldi . Imron, Raja Shadam Ali Irga Irga Juwariyah, Tatik Kusumo, Rayhan Suryo Lina Ayu Marcelina Muhammad Naufal Bari Nur Cholis Nurzati, Syarif Adhika Adhin Pamungkas, Eny Dewi Parluhutan, Yohanes Mangatur Pradana , Sigit Prasetyo, Eko Andi Rachman, Muhammad Nanda Fatur Rita Ismail Rizkiati Ramadhani, Mahirah Salwa Aurelia Ananda Rosidi, Erlia Nurbayti Shafa, Naura Sitorus, Henri BH Sudjasta, Bambang Sulistyawati, Wiwin Suryo, Taufik Hadi Sutarya, Muhamad Farad Syifaul Janan Teris Ekamila Wiwin Sulistyawati Yohanes Mangatur Parluhutan Yuliana Dewi