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All Journal SIGMA EPSILON - Majalah Ilmiah Teknologi Keselamatan Nuklir Infotekmesin Jurnal Konversi Energi dan Manufaktur Prosiding Seminar Nasional Pengabdian Kepada Masyarakat
Dyah Arum Wulandari
Universitas Negeri Jakarta
Aerospace Engineering Humanities Automotive Engineering Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Other

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STUDI PENGARUH LAJU ALIRAN UDARA PENDINGIN PADA CONDENSER TERHADAP DISTRIBUSI SUHU MODEL LOOP HEAT PIPE Rifa Reynaldi; Mukhsinun Hadi Kusuma; Giarno Giarno; Dyah Arum Wulandari
SIGMA EPSILON - Buletin Ilmiah Teknologi Keselamatan Reaktor Nuklir Vol 25, No 2 (2021): November 2021
Publisher : Badan Tenaga Nuklir Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/sigma.2021.25.2.6371

Abstract

Penggunaan sistem pendingin pasif perlu ditingkatkan dalam rangka meningkatkan keselamatan operasi instalasi nuklir. Salah satu teknologi sistem pendingin pasif yang berpotensi untuk digunakan adalah loop heat pipe (LHP). Tujuan studi eksperimen ini adalah mempelajari pengaruh besarnya laju aliran udara pendingin terhadap pembuangan kalor oleh model LHP, dan mempelajari fenomena perpindahan kalor yang terjadi di dalamnya. Dalam studi ini peneliti melakukan eksperimen dengan mengoperasikan model LHP pada berbagai variasi laju aliran pendinginan udara sebesar 0 m/s, 1 m/s, 1,5 m/s dan 2 m/s. Pemberian beban kalor pada evaporator digunakan dengan memvariasikan suhu air panas pada 35°C, 45°C, 55°C, dan 65°C. Model LHP diisi dengan fluida kerja berupa air demineral pada filling ratio 200%. Model LHP divakum dengan tekanan awal -74 cm Hg. Hasil studi menunjukkan bahwa model LHP memiliki hambatan termal terendah sebesar 0.0017 °C/W pada saat diberikan laju aliran pendingin 2 m/s. Kesimpulan studi menyebutkan bahwa semakin besar laju aliran pendingin di condenser dapat meningkatkan unjuk kerja termal model LHP.
PENGARUH SUDUT BILAH PADA PERFORMA KIPAS AKSIAL TEROWONGAN ANGIN KECEPATAN RENDAH MENGGUNAKAN METODE KOMPUTASI Dyah Arum Wulandari; Endri Sriadi
Jurnal Konversi Energi dan Manufaktur Vol. 1 No. 2 (2014)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.537 KB) | DOI: 10.21009/JKEM.1.2.2

Abstract

Terowongan angin digunakan untuk mengetahui karakteristik aerodinamik dari sebuah benda. Salah satu komponen terowongan angin yang memiliki fungsi penting adalah kipas aksial. Kipas aksial berfungsi untuk menghasilkan angin pada terowongan angin. Pengendalian kecepatan aliran udara dapat dilakukan dengan menggunakan perubahan pada sudut bilah kipas aksial. Penelitian ini bertujuan untuk mengkaji pengaruh sudut bilah terhadap performa kipas aksial terowongan angin kecepatan rendah dengan menggunakan metode komputasi. Metode penelitian ini menggunakan simulasi perangkat komputasi aliran fluida dinamik dengan melakukan variasi sudut bilah kipas aksial pada sudut 8o sampai pada sudut 80o interval 8o, menggunakan putaran motor 1400 rpm. Berdasarkan hasil penelitian didapat, bahwa perubahan sudut bilah kipas aksial dengan performa yang terbaik ada pada sudut 64o dengan nilai beda tekanan sebesar 694,70 Pascal, nilai daya yang dihasilkan sebesar 858,33 Watt, dan efisiensi sebesar 57,58 %. Karakteristik dari aliran udara pada kipas aksial memiliki nilai kecepatan yang semakin besar menuju arah tip dari kipas aksial, tekanan pada bagian belakang bilah kipas aksial lebih besar dibandingkan bagian depan dari kipas aksial, aliran udara mengalami efek putar sebelum memasuki kipas aksial dengan intensitas kecil dan efek putar dengan intensitas besar setelah melewati kipas aksial. Perubahan sudut bilah berpengaruh terhadap performa kipas aksial terowongan angin kecepatan rendah. Pengembangan kipas aksial dapat dilakukan dengan memperbesar bentuk bilah pada bagian tip kipas aksial untuk meningkatkan efektivitas dari kipas aksial mengingat karakteristik dari kontur kecepatan aliran udara pada bilah kipas aksial.
ANALISIS POWER YANG DIPERLUKAN PADA RANCANG BANGUN ALAT BANTU SENAI PORTABEL Eko Arif Syaefudin; Aam Amaningsih Jumhur; Dyah Arum Wulandari; Wardoyo; Muhammad Alfian Dwi Putra Putra
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 2 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.2.2

Abstract

Machines as tools in human work are currently the main needs that need to be in the goods and service industry. The machine as a tool based on its use is divided into 2 types, namely permanent/static and mobility/portable. Permanent machines are more widely used in the industrial world, while portable machines are more for repair services, which require various locations that are sometimes difficult to reach, and the application position can operate properly, and save time, energy, operational costs, and can be used anywhere. The weakness of portable machines lies in the power used because the power source uses mostly batteries. For this reason, further research is needed to obtain an analysis of the appropriate power requirements in the field. The steps taken in this study used experimental research methods to obtain results relevant to the power used according to the design needs of the tool. Control and power design analysis uses components such as DC electric motors, switches, adapters, and infrared sensors. From the results of the analysis of the control and power design calculations, the results obtained in the calculation of the electric motor power of 114 W (general power used in portable drilling machines) and the calculation of torque of 6.5 Nm the capacity in making external threads using this tool is capable of a maximum diameter of M6 with ST41 material.
PEMANFAATAN PANAS BUANG DARI KENDARAAN BERTENAGA DIESEL UNTUK MENJALANKAN SISTEM REFRIGERASI ABSORPSI: SEBUAH TINJAUAN Dyah Arum Wulandari; Nasywa Raihan Dhiyaulhaq
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 2 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.2.7

Abstract

In Indonesia, refrigeration using Vapour Absorption Refrigeration System or absorption refrigeration system is still uncommon to be used in vehicles. This system is not like a vapor compression refrigeration system that uses electricity to run the compressor. Instead of it uses heat in the generator. The use of an absorption refrigeration system is considered to apply to vehicles that produce heat from the engine. This review article discusses the use of exhaust heat from several modes of transportation to cool the cabin or product through conceptual research by reviewing relevant literature. The results of this study indicate that a diesel-powered engine can generate sufficient heat to power the cooling system.
Kajian Eksperimen Pengaruh Variasi Perubahan Sudut Kincir terhadap Kinerja Paddle Wheel Aerator Anis Mustaghfirin; Eky Novianarenti; Muhammad Abid Al Fatih; Priyambodo Nur Ardi Nugroho; Dwi Sasmita Aji Pambudi; Dyah Arum Wulandari
Infotekmesin Vol 14 No 1 (2023): Infotekmesin: Januari, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i1.1652

Abstract

The main problem discussed in this study is the effort to improve the quality of shrimp pond water, especially the low dissolved oxygen levels by modifying the angle of the aerator wheel. The results showed that dissolved oxygen (DO) levels were very important in shrimp pond culture and that the paddle wheel aerator was a useful tool in intensive aquaculture systems because it could produce DO as needed. The study used a model designed using Solidworks software and tested at a scale of 1:10 with 3 variations of angles (15°, 35°, and 55°) at each wheel angle. The test results show that the angle variation affects the rotational speed and DO production, with the highest rotational speed and DO production achieved at an angle variation of 55°. However, the best parameters for the aerator were found at a variation of the wheel angle of 35° and a rotational speed of 300 rpm, because it produced the highest dissolved oxygen with relatively low power.
PENERAPAN PEMBANGKIT LISTRIK TENAGA SURYA (PLTS) SEBAGAI MEDIA PEMBELAJARAN DI SMPN 3 TERISI INDRAMAYU Eko Arif Syaefudin; Ahmad Kholil; Dyah Arum Wulandari; Ratu Amilia Avianti; Djoko Walujo
Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Vol 3 (2022): PROSIDING SEMINAR NASIONAL PENGABDIAN KEPADA MASYARAKAT - SNPPM2022
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Negeri Jakarta

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

Abstract

Abstract SMPN 3 Terisi Indramayu is located on Raya Cikedung Street - Terisi, Indramayu Regency, West Java Province. This school is located in the supervision area of UNJ and its position is about 177 km from UNJ. The problem with analysis on the school location is currently being faced there are no learning media of a Solar Power Plant (PLTS) model that can improve students' ability to understand energy conversion theory. The increasing electricity costs also burden the finances of schools whose operational costs rely on School Operation Cost Support by Ministry. Utilization of renewable energy sources of solar power in the school environment is very suitable because it is located in the Pantura Jawa area which has high solar intensity. The solution offered is the application of PLTS as a learning media for students to understand about conversion energy system from solar energy into electrical energy system. The implementation of the activities has been implementation on September 24, 2022, which includes equipment installation and user training. The results of the activity show that PLTS devices with 3 x 120 wp can function properly. The input voltage and amperage indicators, battery voltage and amperage, and the resulting output in AC and DC voltages can turn on the load in the form of lights and fans. The training on the use of tools was opened by the principal and attended by students and teachers of SMPN 3 Terisi. They were enthusiastic about participating in the activities until the end of the event. Abstrak SMPN 3 Terisi Indramayu berada di Jalan Raya Cikedung - Terisi, Kecamatan Terisi, Kabupaten Indramayu Provinsi Jawa Barat. Sekolah ini berada pada wilayah binaan Universitas Negeri Jakarta dan posisinya sekitar 177 km dari Universitas Negeri Jakarta. Permasalah mitra yang dihadapi sekarang ini adalah belum adanya media pembelajaran berupa model Pembangkit Listrik Tenaga Surya (PLTS) yang dapat meningkatkan kemampuan siswa dalam memahami teori konversi energi. Biaya listrik semakin besar juga membebani keuangan sekolah yang biaya operasionalnya mengandalkan BOS. Pemanfaatan sumber energi terbarukan tenaga surya di lingkungan sekolah sangat cocok karena berada di daerah pantura yang memiliki intensitas matahari tinggi. Solusi yang ditawarkan adalah penerapan PLTS sebagai Media Pembelajaran siswa dalam memahami konversi energi dari energi matahari menjadi energi listrik. Pelaksanaan kegiatan telah dilaksanakan pada 24 September 2022 yang meliputi instalasi alat dan pelatihan penggunaan. Hasil kegiatan menunjukkan perangkat PLTS dengan 3 x 120 wp dapat berfungsi dengan baik. Indikator tegangan dan ampere masukan, tegangan dan ampere battere, serta output yang dihasilkan berupa tegangan AC dan DC dapat menyalakan beban berupa lampu dan kipas angin. Pelatihan penggunaan alat dibuka oleh kepala sekolah dan diikuti oleh siswa serta guru SMPN 3 Terisi yang cukup antusias mengikuti kegiatan sampai akhir acara.
APLIKASI COMPUTATIONAL FLUID DYNAMIC PADA ANALISIS DAMPAK BULBOUS BOW TERHADAP HAMBATAN KAPAL BANTU CAIR MINYAK Alina Rizka Maulidah; Tri Karyono; Priyambodo Nur Ardi Nugroho; Dyah Arum Wulandari
Jurnal Konversi Energi dan Manufaktur Vol. 9 No. 2 (2024)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.9.2.5

Abstract

The concept of oil liquid auxiliary vessel combines tanker and container ship features, designed to achieve high speed while maintaining the same displacement, necessitating design analysis to optimize hull resistance. One approach used is the addition of a bulbous bow to the hull. This study compares the resistance between the conventional hull of BCM-3 and the bulbous bow-equipped hull of BCM-4 using computational fluid dynamic (CFD) method with NUMECA. Speed variations used were 16 knots, 17 knots, and 18 knots. The research results show that the use of a bulbous bow on BCM-4 yields more optimal total resistance, with respective resistance values of 339.807 N at 16 knots, 374.558 N at 17 knots, and 497.606 N at 18 knots.
Co-Authors Aam Amaningsih Jumhur Ahmad Kholil Alina Rizka Maulidah Anis Mustaghfirin Djoko Walujo Dwi Sasmita Aji Pambudi Eko Arif Syaefudin Eky Novianarenti Endri Sriadi Giarno Giarno Muhammad Abid Al Fatih Muhammad Alfian Dwi Putra Putra Mukhsinun Hadi Kusuma Nasywa Raihan Dhiyaulhaq Priyambodo Nur Ardi Nugroho Ratu Amilia Avianti Rifa Reynaldi Tri Karyono Wardoyo