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Journal : Rotasi

Experimental Study of Natural Convection Heat Transfer on A Vertical Cylinder with Varying Heat Flux Rakasiwi, Galih; Khoirudin, Khoirudin; Supriyanto, Agus
ROTASI Vol 26, No 3 (2024): VOLUME 26, NOMOR 3, JULI 2024
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.26.3.23-29

Abstract

The most commonly used heat transfer in cooling and heating systems is convective heat transfer. Natural convection heat transfer is typically employed in cooling systems with immersion cooling such as in data centers and transformers. In addition to cooling systems, natural convection is also utilized in heating systems as seen in nuclear reactors. More specifically, natural convection around heated cylinders has widespread applications. The flow of natural convection around vertical heated cylinders is a critical concern in various applications, including vertical tubes within HVAC systems, the heating of electronic components, and the storage of nuclear rods in waste facilities. In this study, a test apparatus in the form of a box measuring 300x200x150 mm with a 650-watt heater installed in the center was used. The heater is jacketed with an outer diameter of 38mm and a length of 195mm. Thermocouple type K are installed on the heater jacket wall and fluid. Convective heat transfer is transiently calculated with constant heat flux. The research results show that in the first phase, there is a significant increase in heat flux of 512.82 W/m2, 769.23 W/m2, and 1025.4 W/m2, respectively, at rates of 0.34, 0.46, and 0.61 ℃/minute. In phase 4, the temperature increase is relatively small, with rates of 0.01, 0.02, and 0.03 ℃/minute, respectively. Heat transfer coefficients (h), Nusselt numbers (Nu), and Rayleigh numbers (Ra) increase with increasing heat flux.
Co-Authors -, Bohari Abdul Mahfudin Alim Adhitiya, Damarnur Ilalang Adillah, Luthfiana Nur Afdal Makkuraga Putra Affandi, Moch Afiludin, Muhamammad Habib Afroga Muhhakat Destri Putra Agung Satrio Nugroho Agung Wahyu Nugroho, Agung Wahyu Agungbudiprabowo, Agungbudiprabowo Agungbudiprabowo, Agungbudiprabowo Ahmad Nasrulloh Ahmadi, Muhammad Didi Akhmad Abdul Hakim Alfiah Hayati Alfisyahr, Layli Noor Alhadi, Said Aliani, Fahrida Alimuddin - Alivia, Siti Almando Geraldi Amanda, Putri Amien Wahyudi Amien Wahyudi Amin Ash Shabah, Musyaffa Amir Amir Amir Amir Amir Amri Abdulah Ana Mariatul Khiftiyah Anantadjaya, Samuel PD Andi Kurniawan Nugroho Anjar Tri Wibowo Anwar Sutoyo Ardhika Falaahudin Arif Budi Prasetya Arif Budi Prasetya Arif Chasanul Muna Arneni, Wanda Dya Ash Shabah, Musyaffa Amin Ash-Shabah, Musyaffa Amin Assalam, Malik Augusto Da Costa Aulia Nanda, Rizki Ayu Tri Wahyuni Aziz, M. Abdul Babay Baqiyatussolihat Bagus Sediadi Bandol Utomo, Bagus Sediadi Bandol Bambang Kusbandrijo Bambang Suprihatin Bambang Suprihatin Bambang Suprihatin Bambang Suprihatin Baqiyatussolihat, Babay Barthos, Megawati Basirrudin, Muhammad Basuki Rahmat Masdi Siduppa Bayu Aji Saputra Beruh, Sri Marantika Brigita Nur Diyan Agustiana Budi Aryanto Budi Astuti Budi Astuti Budi, Pangga Urip Setio Budiansyah, Ade Cepi Cari, Cari Chalid, Muchamad Chandrasa Soekardi Claudy Desya Wiretna Costa, Augusto Da Danny Eka Wahyu Saputra Dela Dwi Alawiyah Devi Tirtawirya Devita Ayu Mei Dina Dewantoro, Hajar Dewi, Kirana Prama Dian Kristianto Diana Natalia Didi Ahmadi, Muhammad Dinda Aulia Djoko Widodo Dodi Mulyadi Dodi Mulyadi Dwi Darmawan Hidayat Dwi Fatmawati, Dwi Dwi Kusuma Wahyuni Dwi Putranti Dwi Winarni Dwi Yuwono Puji Sugiharto, Dwi Yuwono Puji Dwiyanto, Didiek Edi Susanto Ediyanto Ekawati, Jihan Intan Ellya, Ellya Elumalai, Gunathevan Fadillah, Hafidz Maulana Fagustina, Anis Faisal Santiago, Faisal Farid Ardyansyah Farida Ariyani Fateha, Fateha Fathurrahman Fathurrahman Fatimah fatimah Fatimah Fatoni, Muhamad Fauziah, Mufied Febrionny, Princessa Nandita Fera Hayani Harahap Firli Rahmah Primula Dewi Fitri, Enggawati Nur Fransiska, Dina FX Sugiyanto Ghufron Abdullah Giyatmi Giyatmi Gunawan Widjaja Hadian Mandala Putra Hanannika, Laudhira Kinantya Hananto, Agustia Harahap, Fera Hayani Hardi Prasetiawan Hari Eko Irianto Haryana, Syaid Hayatun Nufus Hendiani, Nurlita HENDRATNO Hibaitulah, Hasbi Hikmawan, Muhammad Aslam Husni, Ahmad I Ketut R. Sudiarditha I NYOMAN SANTIAWAN, I NYOMAN Ifah Munifah Ikasari, Diah Imam Mandriyanto Iman Darmawan, Iman Imtinan, Salsabila Indah Choiriyah Indah Fahmiyah Indah Sulistyowati, Indah Indra Gumelar Intan Ayu Pratiwi, Intan Ayu Irdasari, Wahyu Nila Irfanudin, Hafidz Irvan Budhi Handaka Irvan Budhi Handaka, Irvan Budhi Izna Faizarahma Sajidulloh Jamal Basmal, Jamal Joko Santoso Joko Widodo Junairiah Junairiah Karismayani, Made Karyadi Karyadi Karyadi Khamid Budiman Khiftiyah, Ana Khoirudin Khoirudin, Khoirudin Kusumaningrum, Wida Banar Kusumawati, Zunita Dyah Langgeng Ristri Fauzi Lidiawati, Neng Astri Lismadiana Lukas, Ahmad M. Arif Hakim Magfiroh, Ani Manikya Pramudya Marbun, Diansyah Mardi Mardi Mardiyana, Indri Martiono, Frisdian Maulana, M. Rifki Miftahul, Aulia Moch. 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