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All Journal ASEAN Journal of Systems Engineering Jurnal Penelitian Saintek Rotasi Jurnal Simetris Rekayasa Mesin Journal of Engineering and Technological Sciences Jurnal Rekayasa Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Conference SENATIK STT Adisutjipto Yogyakarta Jurnal Perikanan Universitas Gadjah Mada Prosiding Seminar Nasional Pakar Prosiding Seminar Nasional Multidisiplin Ilmu International Journal of Applied Sciences and Smart Technologies ASEAN Journal of Chemical Engineering JOURNAL OF INFORMATION SYSTEM MANAGEMENT (JOISM) Journal of Mechanical Engineering Jurnal Ilmiah Teknik Mesin Poros Teknika STTKD: : Jurnal Teknik, Elektronik, Engine Journal of Mechanical Design and Testing (JMDT) METAL : Jurnal Sistem Mekanik dan Termal Industrial Research Workshop and National Seminar Atom Indonesia Proceeding of The International Conferences on Engineering Sciences
Deendarlianto
Departemen Teknik Mesin Dan Industri, Fakultas Teknik, Universitas Gadjah Mada. Jl. Grafika No. 2, Kompleks UGM, Yogyakarta 55281, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Other

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Journal : Atom Indonesia

 1 
Non-Dimensional Number Analysis on Natural Circulation Flow Changes Inside Straight-Pipe Heat Exchanger of Water Cooling Tank in FASSIP-02 Test Loop Arista, E. P.; Deendarlianto, D; Al-amin, A. S.; Setiawan, P. H.; Gunawan, H. A.; Juarsa, M.
Atom Indonesia Vol 50, No 2 (2024): AUGUST 2024
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/aij.2024.1387

Abstract

The FASSIP-02 test loop is a large-scale experimental facility that investigates natural circulation flow rate phenomena to improve passive safety systems of nuclear reactors. Heat transfer in the piping system will result in pattern and magnitude of the natural circulation flow being formed, so it is essential to investigate the heat dissipation capabilities, which will later be applied in nuclear passive cooling systems. The heat transfer behavior of passive cooling systems in large-scale facilities can be quantified with non-dimensional numbers. This research analyzes heat transfer in a straight heat exchanger by comparing non-dimensional numbers based on the Dittus-Boetler and McAdams correlation with the correlation generated from experimental data. The analysis results show that the predicted McAdams correlation with the experimental correlation is higher than 83 %. Meanwhile, Dittus Boetler's correlation prediction with the experimental correlation is smaller than 71 %. The dominance of momentum diffusivity in the cooling process shows the characteristics of thermal behavior with the Prandtl number. In addition, all-natural circulation flow variations occur in a turbulent flow regime that increases with increasing water temperature in the heating tank.
The Effect of Loop Inclination on Natural Circulation Mass Flow Rate and Heat Removal Inside Rectangular Passive Cooling Loop Budiyanto, N. R.; Deendarlianto, D; Yuliaji, D.; Oktaviandi, R.; Raharjo, E. P. A.; Mariyadi, S. A.; Pamungkas, A. E.; Setiawan, P. H.; Budiman, A. A.; Juarsa, M.
Atom Indonesia Vol 51, No 3 (2025): DECEMBER 2025
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/aij.2025.1467

Abstract

The use of passive cooling systems as a reactor safety measure has become a key approach to preventing future incidents similar to the Fukushima Daiichi NPP accident. These systems operate based on natural circulation, a process driven by temperature differences and elevation between the heat source and heat sink. Key design factors, such as the inclination angle of the rectangular loop, significantly influence this circulation. This study aims to investigate the effects of different inclination angles of the rectangular loop and variations in the initial water temperature in the Water Heating Tank (WHT) on the flow rate and heat removal capability. The research was conducted experimentally using a natural circulation rectangular loop facility, FASSIP-04 Ver.0, which has an inner diameter of 26.64 mm, a rectangular loop height of 2280 mm, and a width of 780 mm. The experimental variations were achieved by adjusting the water temperature inside the WHT to 50°C, 70°C, and 90°C. Meanwhile, the inclination angle of the loop was set to 30°, 60°, and 90° mass flow rate and heat removal capability was influenced by both the loop inclination angle and the water temperature in the WHT. The highest values were observed at a 90° inclination angle and a set temperature of 90°C, with a mass flow rate of 0.0241 kg/s, and heat removal rates of qH = 0.791 kW, qC = 0.489 kW. The resulting buoyancy force was stronger under these conditions, leading to greater heat removal through natural circulation compared to free convection, thereby increasing both mass flow rate and heat removal efficiency.
Co-Authors . Agato Abd. Rasyid Syamsuri Achilleus Hermawan Astyanto Afisna, Lathifa Putri Agato, Agato Akhmad Zidni Hudaya Akmal Irfan Majid Al Huda, Luqman Al-amin, A. S. Aldy Franstanata Ritonga Alfeus Sunarso Alim Isnansetyo Alva Edy Tontowi Andhika Satria Pratama Anggita Gigih Wahyu Iriawan, Anggita Gigih Wahyu Ari Prasetyo Arif Widyatama Arirohman, Ilham Dwi Arista, E. P. Asroni Asroni Aswati Mindaryani Bambang Triyatmo Bardi Murachman Batubara, Yongki Benny Arif Pambudiarto Bertha Maya Sopha Budiman, A. A. Budiyanto, N. R. Calista Anjani Dwiputri Dannys Arif Kusuma Dedy Kurniawan Dodi Satriawan, Dodi Drajat Indah Mawarni Dwi Budi Santoso Dwi Yuliaji Eko Budiana Eko Nugroho Fahadha, Rizqa Ula Fajarningrum, Nurmala Dyah Farid Jayadi Fauzun Fauzun Fellando Martino Nugroho Fitrah Qalbina H. A. Gunawan, H. A. Hananto, Leila Hanjani Haslinda Kusumaningsih Heppy Kristiyani, Heppy I Indarto INDAH ISTIQOMAH Indarto Indarto Indarto - Indarto Indarto Indarto Indarto Indarto Indarto Indarto Indarto Indarto Indarto Indarto Indarto Indro Pranoto Kharisma, Sunandi Khoirun Nisa Alfitri Kumara Ari Yuana Kurniawan, Dondi Kusumaningsih, Haslinda Lathifa Putri Afisna M. Fendy Kussuma Hadi Sufyan M. Juarsa M. Rian Alif Madani Mariyadi, S. A. Maryadi , Shendy Akbar Medha, Akbar Yuga Adhikara Muhammad Fakhri Alfath Mulya Juarsa Nissaraly H.F. Nugroho, Fellando Martino Oktaviandi, R. Oktaviandi, Ryan Okto Dinaryanto Pambudiarto, Benny Arif Pamungkas, A. E. Rachmawan Budiarto Raharjo, E. P. A. Rifda Salsabila Zahra Rio Budiman Romi Novriadi Roy Waluyo Rudy Kurniawan Rustadi Rustadi Samsul Kamal Samuel Hartono Samuel Hartono Septiana Ria Prihandita Setiawan, P. H. Setya Wijayanta Shima Bhaskara Ayuningrum Sigit Deddy Purnomo Sidhi Sinung Rahardjo Sudarja Supriyanto Supriyanto Teguh Wibowo Teguh Wibowo Teguh Wibowo Thomas S. W. Untung Surya Dharma Untung Surya Dharma, Untung Surya Wakhid Hasyim Wenang Wibawa Endra Juwana Wibawa Endra Juwana, Wibawa Endra Widodo, Gilang Destya Wiratni Budhijanto Wiratni Budhijanto Wiratni Wiratni Wiratni Wiratni, Wiratni Yuliaji, D. Yundari, Yundari Yusuf Rahman