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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Teknosains Jurnal Teknologi Jurnal Rekayasa Mesin Jurnal Polimesin Seminar Nasional Riset dan Teknologi (SEMNAS RISTEK)
Putut Hery Setiawan
Pusat Rekayasa Perangkat Nuklir dan Pusat Teknologi Reaktor dan Keselamatan Nuklir
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Investigation of Heat Exchanger Performance in The Heating Tank Section of Loop FASSIP 03 NT Haryanto, Dedy; Budiman, Arif Adtyas; Putra, Muhammad Ganjar; Setiawan, Putut Hery; Juarsa, Mulya
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.41-52

Abstract

The Passive System Simulation Facility (FASSIP) loop is an experimental test facility for a passive cooling system to recover the residual heat from decay produced by the reactor core during accident conditions. The Heating Tank Section (HTS) is one of the components of the FASSIP 03 NT facility. This component is equipped with a heat exchanger, 3 types of heat exchangers can be applied to HTS. Namely heat exchangers of the Straight Pipe Heat Exchanger (SPHE) type, the Straight Pipe Fins Heat Exchanger (SPFHE) type, and the Helical Pipe Heat Exchanger (HPHE) type. A modification was made to increase the efficiency of HTS, namely replacing the electric heater on the HTS from a ceramic band heater type to an immersion heater type. With this modification, it is necessary to know the performance of the heat exchanger on HTS and its speed in reaching operational temperature. The HPHE-type heat exchanger is more efficient than the SPHE-type and SPFHE-type heat exchangers. The HPHE-type heat exchanger has a much larger length of 5.5 m, so the thermal resistance (Rth) is very small, namely 0.003926 ℃/W. To reach the working fluid temperature in the range of 50 – 90 ℃, the HPHE-type heat exchanger requires 35 – 86 minutes.
Optimizing the density of ultrafine bubbles fluid by time and production volume in a closed-loop system Budiman, Arif Adtyas; Meikayani, Jentik; Nitiamijaya, Devita; Wardhani, Veronica Indriati Sri; Setiawan, Putut Hery; Juarsa, Mulya; Prayogo, Kukuh; Baiquny, Ariq Hafizh
Jurnal Teknosains Vol 14, No 2 (2025): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.100358

Abstract

Ultrafine bubbles (UFBs) play a crucial role as catalysts in water treatment, pharmaceuticals, biomedical engineering, and industrial processes, particularly those involving heat transfer mechanisms. Several researchers in Indonesia have explored ultrafine bubble fluids' potential as a heat transfer medium in passive cooling system models. In this context, changes in the density of ultrafine bubble fluids serve as the primary driver for flow. Since ultrafine bubbles increase in diameter when heated, examining an optimal production model is essential to ensure their availability in the flow. This study aims to optimize the production of ultrafine bubble fluids with the lowest possible density compared to the base fluid (reference). The research investigates the effect of production time and volume variations on ultrafine bubble density in a closed-loop system. Production times of 30, 60, 90, 120, 150, and 180 minutes are tested across tank volumes of 20, 40, 50, and 60 liters. The closed-loop production model utilizes hydrodynamic cavitation to maintain continuous fluid flow, with sample collection occurring at 15-minute intervals after the initial production time to allow for stable bubble size. Observations and statistical analysis using the Response Surface Method (RSM) reveal a nonlinear relationship between production time and ultrafine bubble fluid density. The optimal density is achieved with a production time of 60 minutes for a 40-liter volume. Additionally, this closed-loop model increases the temperature of the ultrafine bubble fluid to 54.3 °C in a 20-liter volume. Heat accumulation occurs due to the continuous pump-driven flow without additional cooling systems.
EFISIENSI HEATING TANK SECTION PADA KONDISI TUNAK BERDASARKAN VARIASI DAYA PEMANAS Haryanto, Dedy; Rosidi, Ainur; Setiawan, Putut Hery; Juarsa, Mulya
Semnas Ristek (Seminar Nasional Riset dan Inovasi Teknologi) Vol 7, No 1 (2023): SEMNAS RISTEK 2023
Publisher : Universitas Indraprasta PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/semnasristek.v7i1.6239

Abstract

Kejadian station blackout (SBO) pada PLTN Fukushima Daiichi pada Maret 2011 di Jepang menjadi latar belakang yang penting untuk kegiatan penelitian tentang sistem pendinginan pasif pada teknologi keselamatan reaktor nuklir. Pengaruh perubahan densitas fluida di daerah panas menimbulkan gaya apung (buoyancy force) dan pengaruh perubahan densitas fluida pada keadaan dingin menimbulkan gaya gravitasi (gravitational force) sehingga terjadi sirkulasi alam pada fluida kerja (air) di sepanjang untai. Tujuan penelitian dilakukan untuk mengetahui unjuk kerja Heating Tank Section (HTS) yang dilengkapinya dengan keterbaruan berupa helical heat exchanger. Penelitian dilakukan secara eksperimental berdasarkan variasi setting temperatur air dalam tangki pemanas dan daya listrik di heater (variasi tegangan regulator). Berdasarkan hasil perhitungan efisiensi pada HTS (εH) dengan keterbaruan yang dimilikinya memiliki rentang 45,48% - 99,41% dengan efisiensi ratarata 82,58%. Efisiensi yang cukup tinggi pada HTS ini menunjukkan bahwa adanya keterbaruan penukar kalor helical meningkatkan unjuk kerja pemanasan HTS pada fasilitas Untai FASSIP-03 NT.
Analisis Aliran Sirkulasi Alami di Bagian Pendingin Berdasarkan Variasi Temperatur Air Pemanas pada Untai Rektangular TP FASSIP-04 Ver.2 Wahyuni, Asri; Yuliaji, Dwi; Setiawan, Putut Hery; Budiyanto, Nur Rochman; Maryadi, Shendy Akbar; Pamungkas, Adhika Enggar; Budiman, Arif Adtyas; Kharisma, Sunandi; Waluyo, Roy; Juarsa, Mulya
Jurnal Rekayasa Mesin Vol. 19 No. 1 (2024): Volume 19, Nomor 1, April 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i1.4706

Abstract

Sistem pendingin pasif berbasis mekanisme sirkulasi alami menjadi topik hangat dalam sistem keselamatan PLTN karena tidak membutuhkan pasokan listrik dan juga lebih ekonomis, maka perlu dilakukan penelitian untuk memperoleh karakteristik pendinginan pada bagian tangki pendingin perlu dipelajari mengingat proses pendinginan dilakukan dengan model tidak langsung. Tujuan penelitian yang dilakukan adalah untuk menganalisis aliran sirkulasi alami di bagian pendingin berdasarkan variasi temperatur air pemanas pada Untai Rektangular TP FASSIP-04 Ver.2. Penelitian dilakukan untuk memperoleh karakteristik perubahan temperatur pada bagian tangki pendingin berdasarkan variasi temperatur air pemanas serta bilangan Reynold dan laju aliran yang terjadi terhadap variasi temperatur. Metode penelitian dilakuan secara eksperimental dengan memvariasi temperatur air pemanas dari 50oC, 60oC, dan 70oC dengan daya pemanas 4,2 kW dan temperatur air pendingin ditetapkan pada 20oC. Pengolahan data menghasilkan grafik karakteristik temperatur dan laju aliran yang terjadi. Hasil eksperimen menunjukkan bahwa berdasarkan laju aliran sirkulasi alami yang terjadi pada bagian tangki pendingin Untai Rektangular TP FASSIP-04 Ver.2 untuk variasi temperatur air pemanas 50 oC sebesar 1,32 LPM berada pada rejim aliran laminar dengan bilangan Reynold bernilai 1851 sedangkan pada temperatur air pemanas 60 oC dan 70 oC sebesar 1,61 LPM dan 1,94 LPM berada pada rejim aliran transisi yang secara berturut-turut bilangan Reynold bernilai 2624 dan 3716. Kenaikan gradien temperatur antara sisi panas dan sisi dingin telah meningkatkan laju aliran sirkulasi alami dan mempengaruhi rejim aliran yang terbentuk.
Effect of water temperature on flow regimes and reynolds number in a passive natural circulation cooling system Setiawan, Putut Hery; Pamitran, Agus Sunjarianto; Yuliaji, Dwi; Pamungkas, Adhika Enggar; Budiman, Arif Adtyas; Amelia, Almira Citra; Maryadi, Shendy Akbar; Irwansyah, Ridho; Juarsa, Mulya
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6665

Abstract

Natural circulation flow is an important phenomenon of passive cooling systems in nuclear reactor thermal management during accidents. This experimental study investigates the effect of varying water temperatures on flow regimes and Reynolds number within a passive natural circulation system. The research was conducted using a rectangular TP-loop (FASSIP-04 Ver.2) made of 1-inch SS304 pipe, 6 m high and 1.32 m wide. The water temperature setting was varied at 45°C, 55°C, 65°C, and 75°C, with a heating power of 4.2 kW, and the cooling tank was maintained at 10°C. Observations were made during transient heating, steady-state (for 3 hours), and transient cooling phases. Results show that increasing the heating tank temperature reduces fluid density and viscosity, thereby enhancing buoyancy-driven flow. This led to a transition in flow regimes from laminar to turbulent as the temperature increased. The Reynolds number increased by 169.38% when the water temperature was raised from 45°C to 75°C. Unstable flow behaviour, including fluctuating amplitudes and frequencies, was observed—characteristic of natural circulation dynamics. The study confirms a strong correlation between thermal variation and flow regime transition, providing insights into the performance of passive cooling systems under varying thermal loads.
Implementation of adaptive PID control for maintaining temperature stability during steady-state conditions in stirred heating tank Valentina, Pricylia; Tjahjono, Hendro; Pamitran, Agus Sunjarianto; Roswandi, Iwan; Setiawan, Putut Hery; Budiman, Arif Adtyas; Haryanto, Dedy; Sanda, Sanda; Prayogo, Kukuh; Juarsa, Mulya
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 4: December 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i4.pp2389-2399

Abstract

Temperature stability is a crucial factor in industries such as chemicals, pharmaceuticals, and food processing, where fluctuations can damage product quality and increase energy consumption. This study aims to optimize heater power control using an adaptive proportional integral derivative (PID) control system to maintain temperature stability under steady-state conditions. The method involves applying adaptive PID control to a stirred heating tank using LabVIEW software with a national instruments controller module and a single-phase SCR to regulate heater power and adjust control parameters in real time. The results indicate that the system operates more effectively under stable conditions, with faster response times and a lower overshoot of less than 0.12%. However, under disturbed conditions, such as water drainage and replacement, the system requires more time to adjust the temperature and experiences increased energy consumption and heat loss. Despite this, the system still achieves an energy efficiency improvement, with efficiency values ranging from 77.66% to 80.03%. The implementation of adaptive PID control demonstrates significant potential in enhancing system accuracy and response to temperature changes, contributing to the development of more efficient industrial control technologies.
Co-Authors Ainur Rosidi, Ainur Amelia, Almira Citra Baiquny, Ariq Hafizh Budiman, Arif Adtyas Budiyanto, Nur Rochman Dedy Haryanto Dwi Yuliaji Hendro Tjahjono Kharisma, Sunandi Maryadi, Shendy Akbar Meikayani, Jentik Mulya Juarsa Nitiamijaya, Devita Pamitran, Agus Sunjarianto PAMUNGKAS, ADHIKA ENGGAR Prayogo, Kukuh Putra, Muhammad Ganjar Ridho Irwansyah Roswandi, Iwan Roy Waluyo Sanda Sanda Valentina, Pricylia Veronica Indriati Sri Wardhani, Veronica Indriati Sri Wahyuni, Asri