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OPTIMASI KONSENTRASI ETHYLENE GLYCOL FLUIDA KERJA PADA PERANCANGAN PARABOLIC TROUGH CONCENTRATOR DENGAN REPLEKTOR Jati Widiputra; Iskendar Iskendar; Reza Abdu Rahman
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol 10 No 3 (2020): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/teknobiz.v10i3.1765

An excellence innovation for reducing greenhouse gases are done by developing a new water heater model for household applications. The application of the new model water heater by utilizing Parabolic Trough Concentrator with an indirect heating system uses heat transfer fluid able to improve the reliability of water heater compared to the thermosyphon model. Optimization for the new model is done by enhancing the reflector material and also heat transfer fluid. The experiment is done by applying the same standard measurement in order to set an adequate data for each model. The optimal reflector for the system to concentrating the solar power is polymer substrate as the fluid heated faster. The water-based solution with ethylene glycol 50:50 (v/v) for heat transfer fluid shows the best performance by achieving 98,2 oC for the 10th minute, and after one hour, the final temperature is 100,5 oC. By using a polymer substrate as a reflector for the Parabolic Trough Concentrator and using heat transfer fluid based on ethylene glycol water-based solution by concentrator 50:50 (v/v) shows the best performance among all sample with the fastest heating rate and the highest final temperature after the one-hour experiment. It shows this model has advantages to improve the system reliability by increasing the heating rate of the heat transfer fluid, which able to heat the water on the system faster.

Rancang Bangun Bed Storage untuk Thermal Energy Storage Berbasis Parafin dan Serbuk Besi Agri Suwandi; Zulfikar Sjarief; Dwi Rahmalina; Reza Abdu Rahman
JTERA (Jurnal Teknologi Rekayasa) Vol 6, No 1: June 2021
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31544/jtera.v6.i1.2021.163-174

Thermal Energy Storage (TES) dimanfaatkan sebagai media penyimpanan panas untuk sistem concentrated solar power, solar heater, dan thermal management system pada kendaraan ringan. Tantangan dari aplikasi TES adalah desain dari bed storage yang digunakan harus memenuhi fungsi dasar yakni proses perpindahan panas saat charging dan discharging serta mampu menyimpan panas dengan kerugian panas yang sedikit. Pada penelitian ini, bed storage untuk TES didesain guna memenuhi fungsi sebagai media penyimpanan panas untuk aplikasi suhu rendah yakni 50-100°C. Material penyimpanan yang digunakan adalah campuran parafin dan serbuk besi dengan rasio massa 90:10. Penentuan fungsi menggunakan metode desain Pahl dan Beitz memberikan opsi penggunaan coil tube dengan material tembaga sebagai media perpindahan panas dan bed storage dengan bahan polimer termoplastik polyacetal. Hasil pengujian prototipe bed storage proses charging menunjukkan efisiensi perpindahan panas hingga 26,85% dengan koefisien perpindahan panas menyeluruh 21,422 W/m2.°C. Proses discharging menunjukkan performa yang efektif dengan karakteristik perpindahan panas optimal berdasarkan koefisien perpindahan panas yang tinggi. Pada penggunaan bahan polyacetal dan nilai konduktivitas termal rendah yakni 0,231 W/m.K menyebabkan laju kerugian panas yang sangat lambat hanya 2,924 W. Prototipe yang dibuat mampu memaksimalkan proses perpindahan panas di sisi material bed storage untuk fungsi charging dan discharging dan mampu menekan laju kerugian panas pada fungsi storing.

RANCANG BANGUN ALAT DESALINASI AIR LAUT SKALA LAB TIPE MULTI STAGE FLASH Dwi Rahmalina; Erlanda Augupta Pane; Raka Chandra Herdyana; Dio Pratama Dirgahayu Putra; Reza Abdu Rahman
Otopro Vol 17 No 2 Mei 2022
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v17n2.p48-56

Desalination is a water treatment process to separate salt from a salt solution to produce drinking water or water with low TDS. The technology used uses Thermal Energy as a heat source using the Phase Change Material (PCM) principle. This research uses the Pahl-Beitz design method. The results of the design are based on the value of the variant in variant 1 is 3.36, variant 2 is 3.22 and variant 3 is 3.14, and the selected value is variant 1 with a weight value of 3.36. The selected variant is tested for strength against heat on the components to ensure it is safe and can be carried out in the manufacturing stage. The process of making seawater desalination tools is carried out using the DFMA design method, each process of working on the tool refers to the Standard Operation Procedure that has been determined and the assembly process is carried out sequentially according to the Operation Process Chart. The manufacture of seawater desalination equipment is carried out by many processes, from material cutting to welding and component assembly. The data from the calculation analysis on the pipe, obtained the axial stress value of 3811.96kN/m2. The results of the calculation of stress due to pressure in the pipe of 317.5kN/m2 circumferential stress of 635kN/m2. The minimum thickness of the pipe is 2.0875mm. the calculation of the circular pipe flow velocity is 9.96m/s. The components in this tool consist of a seawater desalination tool with 41 stages of the process.

Metode Pendinginan Cepat Proses Pendinginan pada Produk Hasil Proses Tempa Budhi Muliawan Suyitno; Muhammad Arifin Dwi Admoko; Reza Abdu Rahman; Ismail
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol 12 No 3 (2022): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/teknobiz.v12i3.4254

Perbaikan model pendinginan produk hasil proses tempa dilakukan dengan tujuan mempercepat proses dandori. Tindakan ini diambil berdasarkan prinsip Total Produktive Maintenance (TPM) dengan tujuan meningkatkan efektivitas produksi untuk memaksimalkan pemanfaatan sumber daya yang tersedia. Proses pendingin cepat dilakukan dengan mempertimbangkan prinsip perpindahan panas pada material hasil tempa dengan target utama waktu proses menjadi lebih cepat tanpa merusak struktur material. Uji eksperimental dilakukan pada kajian ini dengan tujuan menganalisis proses perpindahan panas pada alat pendingin produk. Analisis dibutuhkan untuk mendapatkan hasil kualitas pendinginan cepat yang optimal dengan tetap menjaga struktur material produk secara umum. Metode eksperimen digunakan berdasarkan data awal model pendingin tersedia dan pengukuran penurunan suhu produk. Laju penurunan panas digunakan untuk menentukan durasi pendinginan tercepat. Enam variasi metode pendinginan dipilih berdasarkan kombinasi media pendinginan dan jumlah nosel yang digunakan. Penggunaan metode pendinginan standar membutuhkan waktu 20 menit untuk mencapai target suhu akhir 40 °C. Penambahan dua nosel udara memberikan pengaruh positif di mana laju pendinginan menjadi lebih cepat 4 menit dengan tetap menjaga struktur material. Metode pendinginan dengan tambahan akhir menunjukkan waktu paling cepat namun berdampak pada retakan di produk sehingga tidak dapat dipilih. Dengan demikian, proses pendinginan lebih cepat dapat dilakukan dengan menggunakan dua nosel udara tambahan tanpa merusak kualitas produk.

Pengembangan Alat Desalinasi Air Laut dengan Teknologi Thermal Energy Storage Muhammad Abdul Munir; Reza Abdu Rahman; Dwi Rahmalina
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 5 Nomor 2 Tahun 2023
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v5i2.4499

The need for clean water in household life is very important because humans cannot live without it. The composition of seawater consists of 96.5% pure water and 3.5% other materials, namely salts, dissolved gases, and others. Indonesia is one of the countries that has the second-longest coastline in the world, so the potential for utilizing sea water is very large, one of which can be through the desalination process. Distillation itself is distillation, and its by-product is salt when seawater is heated using a heat energy source with a concentrated solar power (CSP) system. Based on research that has been done previously, the tool is a lab-scale seawater desalination device, but the process of making a lab-scale seawater desalination tool is not optimal. Then design the construction of a lab-scale seawater desalination device with the Multi Stage Flash (MSF) type, and the aim is to determine the performance and functionality of the MSF-type lab-scale seawater desalination device. The results show that the results of the coil heat exchanger development obtained an inlet temperature of 85.9°C and an outlet temperature of 67.8°C, and the room temperature in the chamber can be maintained at a temperature of 68.9°C. As for the components being developed, such as sea water pumps, hoses, tees, and sprayers, a sea water debit of 53.78 liters per hour has been obtained.

Implementasi teknologi rumah pengering hybrid untuk mendukung proses pengeringan ikan di Desa Terapung, Buton Tengah Reza Abdu Rahman; Dwi Rahmalina; Agri Suwandi; Nia Rachmawati; Aulia Keiko Hubbansyah
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 1 (2024)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v5i1.7386

Potensi tangkapan ikan teri di Indonesia sangat tinggi. Salah satu sentra produksi ikan teri ada di wilayah Desa Terapung, Kecamatan Mawasangka, Kabupaten Buton Tengah, Provinsi Sulawesi Tenggara. Namun demikian, model pengeringan yang dilakukan masih menggunakan metode pengering terbuka (jemur langsung). Peningkatan proses pengeringan dapat dilakukan melalui teknologi rumah pengering hybrid. Kegiatan implementasi model rumah pengering ikan dilakukan dengan maksud untuk transfer teknologi yang dapat mendukung kegiatan masyarakat setempat. Tujuan lain dari kegiatan ini adalah mendukung proses transisi energi melalui penerapan teknologi energi baru dan terbarukan (EBT) yang dapat mendukung kemandirian ekonomi masyarakat. Hasil dari kegiatan ini adalah rumah pengering hybrid dengan kapasitas 8,64 kWpthermal (ekuivalensi pv) yang dilengkapi dengan baterai termal kapasitas 3.800 Wh dan panel surya dengan kapasitas 900 Wp.

Experimental evaluation on the power characteristic of direct-photovoltaic charging for thermal storage equipment Rahman, Reza Abdu; Sulistyo, Sulistyo; Utomo, Mohamad Said Kartono Tony Suryo; Ragil, Dimas; Suyitno, Budhi Muliawan
Mechanical Engineering for Society and Industry Vol 4 No 1 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.11493

Thermal storage is an essential equipment for storing excessive heat, especially for water heating systems. The present work proposes a preliminary study to maximize the operation of thermal storage using photovoltaics as the primary source for charging the heat storage material. The assessment indicates the concept is feasible, where the output power from photovoltaics can be directly converted to heat using a heating element. The power ratio is considerably high (up to 38.6%), resulting in the maximum temperature of the heat absorber material (water) increasing to 43.2 °C. The final assessment using suitable phase transition material shows that steady phase behavior is essential to maximizing the temperature profile of the material. It is achieved using stabilized-hexadecanoic acid, which shows a transient phase transition at a temperature of 54.2 °C, reducing the possibility of heat loss with an average temperature rate of 0.54 °C/min in the discharge stage. This finding proves the proposed concept is applicable, while further improvement can be done to adjust the suitable power output from photovoltaic and storage tank arrangement for the actual system. Despite that, the result is expected to accelerate the utilization of photovoltaics as reliable solar renewable technology.

Desiminasi Produk Teknologi Mekanik Pada Sekolah Kejuruan Dalam Proses Pembelajaran Erlanda Pane; Yani Kurniawan; Reza Abdu Rahman
SULUH: Jurnal Abdimas Vol 6 No 2 (2025): SULUH: Jurnal Abdimas Februari
Publisher : FEB-UP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/suluh.v6i2.5473

Pendidikan menengah kejuruan merupakan pendidikan jenjang menengah yang diterapkan untuk mengembangkan bakat serta keahlian siswa kejuruan dalam melakukan pekerjaan yang berorientasi pada kebutuhan dunia industri. Tujuan pendidikan menengah tersebut dapat diwujudkan dengan dukungan kegiatan praktikum kerja di bengkel kerja yang memiliki sistem sarana dan prasarana yang optimal. Namun, kondisi penyebaran sarana dan prasarana praktikum pada bengkel kerja Sekolah Menengah Kejuruan (SMK) masih belum tersebar secara merata pada saat ini. Kegiatan pengabdian kepada masyarakat melalui penguatan dari sisi aspek pengadaan material praktikum kerja pada bengkel kerja SMK menjadi salah satu bentuk program pengembangan bengkel kerja SMK yang bertujuan untuk mewujudkan kegiatan aktivitas praktikum yang berjalan secara efektif dan efisien dari sisi waktu praktikum dan pemahaman siswa kejuruan terhadap materi mata pelajaran di bengkel kerja. Metode yang dilakukan pada kegiatan ini antara lain identifikasi permasalahan yang ditemukan dalam proses pengembangan bengkel kerja Sekolah Menengah Kejuruan (SMK), melakukan uji fungsional dan kinerja awal dari prototipe mobil, melakukan penyuluhan dan pembekalan Standar Operasional Prosedur (SOP) prototipe mobil. Hal ini memberikan dampak positif terhadap pengembangan bengkel kerja Sekolah Menengah Kejuruan (SMK) dalam pemenuhan kondisi sarana dan prasarana bengkel kerja terutama pada ketersediaan material kerja praktikum di bengkel kerja.

OPTIMASI KONSENTRASI ETHYLENE GLYCOL FLUIDA KERJA PADA PERANCANGAN PARABOLIC TROUGH CONCENTRATOR DENGAN REPLEKTOR Jati Widiputra; Iskendar Iskendar; Reza Abdu Rahman
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 10 No. 3 (2020): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/teknobiz.v10i3.1765

An excellence innovation for reducing greenhouse gases are done by developing a new water heater model for household applications. The application of the new model water heater by utilizing Parabolic Trough Concentrator with an indirect heating system uses heat transfer fluid able to improve the reliability of water heater compared to the thermosyphon model. Optimization for the new model is done by enhancing the reflector material and also heat transfer fluid. The experiment is done by applying the same standard measurement in order to set an adequate data for each model. The optimal reflector for the system to concentrating the solar power is polymer substrate as the fluid heated faster. The water-based solution with ethylene glycol 50:50 (v/v) for heat transfer fluid shows the best performance by achieving 98,2 oC for the 10th minute, and after one hour, the final temperature is 100,5 oC. By using a polymer substrate as a reflector for the Parabolic Trough Concentrator and using heat transfer fluid based on ethylene glycol water-based solution by concentrator 50:50 (v/v) shows the best performance among all sample with the fastest heating rate and the highest final temperature after the one-hour experiment. It shows this model has advantages to improve the system reliability by increasing the heating rate of the heat transfer fluid, which able to heat the water on the system faster.

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