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Journal : International Journal of Electrical and Computer Engineering

Experimental comparison of air, oil, and liquid nitrogen cooling media on the efficiency of a single-phase transformer Nugraha, Heri; Imaduddin, Agung; Priandana, Eka Rakhman; Hermawan, Asep Dadan; Darsono, Nono; Pramono, Andika Widya; Syahid, Adi Noer; Palaloi, Sudirman; Herbirowo, Satrio; Hendrik, Hendrik
International Journal of Electrical and Computer Engineering (IJECE) Vol 16, No 1: February 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v16i1.pp25-35

Abstract

Transformers are critical component in electric power system, where minimizing energy losses is essential for efficiency and reliability. While ideal transformers operate with zero losses, practical transformers dissipate energy through winding and core losses caused by resistive heating. This study investigates the impact of three cooling media with ambient air, mineral oil, and liquid nitrogen on the efficiency and thermal performance of a 1 kVA single phase copper wound transformer. The experiment applied a resistive load under each cooling condition, recording input and output parameters using a HIOKI power meter model PW3360. Thermal behavior was monitored using infrared thermography and thermocouples. Copper winding resistivity was evaluated using a four-point probe within a cryogenic magnet system. The results show that liquid nitrogen cooling significantly reduced copper resistivity due to low-temperature conditions, achieving a transformer efficiency of 89.9%. Oil cooling improved efficiency to 86.0%, compared to 80.7% with air cooling. Although liquid nitrogen provided the greatest efficiency enhancement, its practical use is limited due to handling complexity and cost. In contrast, oil cooling offers a more feasible and effective solution for improving transformer performance in real world applications. These finding provide valuable insight for optimizing transformer thermal management strategies in power systems.
Co-Authors AA Sudharmawan, AA Aat Ruchiat Nugraha Abdul Aziz Afandy, Muhammad Agung Imaduddin, Agung Ahmad, Hasnia Ajizah, Nur Akbar, Ari Yustisia Alfitri Alfitri Ali, Makhrus Amalia, Inda Amir Bagja Andi Harmoko Arifin Andika Widya Pramono Andoko, Dewanto Andriati, Novi Andry Stepahnie Titing Anshoriyah, Sofiyatul Anton PW Nomleni Ardiansyah, Rio Ardiyan Saptawan Arpandjam'an arpandjam'an, arpandjam'an Arpandjaman, Arpandjaman Asiati, Diah Isnaini Asmi, A.Syamsinar Asmi Asmita Christiany Kombong Atika, Amelia Auliah, Rezki Aulizar Arfan Awan Santosa Baso Intang Sappaile, Baso Intang Bayu Herdianto Cahyono, Andhik Budi Cahyono, Andhik Budi Chicka Willy Yanti Cintia Marendeng, Olivia Ciptasari, Nurhayati Indah Clara Yolandika Daniel Pasaribu Daud Yusuf Deglas, Welly Deni Ahmad Jakaria Desak Eka Susianawati Diah Fatma Sjoraida Dimas Fajar Imanto Durahim, Darwis Elfrida Ratnawati Eliza, Detha Fadhlan Failusuf Salam Fareski, Fahri Febriana, Eni Fernando, Putri Deniya Firman Nugroho Fitri Kumalasari, Fitri Fredy Saputra, M. Khalid Galuh Hartinah Gazali Lembah Guna, Bucky Wibawa Karya Gustini, Gustini Hakim, Supartina Hanif Hanif Hanif Kurniadi Hannan, Sjuaib Harahap, Stepandi Hasbiah Hasbiah, Hasbiah Hastiani -, Hastiani Haulah, Suci Hazmi, Arief Heri Nugraha Hermawan, Asep Dadan Hery Widijanto Hutasuhut, Wilda Rizkiyah Ilwandri, Ilwandri Insani, Fahrul Irving Vitra Paputungan Irwan Novianto Islam, Fahrul Isro’iyah, Latifatul Izzeti, Nadira Juli Jamnasi Juniati Juniati Junita Fabanjo, Ivonne Kalemben, Estevani Khaeril, Khaeril Lalli, Linda Lamun Bathara Lexy Kareba Liliana Puspa Sari Lilis, Lilis Lunatri, Andi M. Nurul Wathani Madehang, Madehang Mahdi, Nurzakia Malau, Ira Mawar Marchelina Rante Mardiana Panggabean, Ellis Martin Martin Ma’arif, Ahmad Fahruddin Millati, Rida' Milliana Moh Tahhir Moningkey, Shirley Moureen, Moureen Muhamad Stiadi Munthe, Desi Natalia Nababan, Roida Nasution, Tio Afandi Nasution, Tio Affandi Nengyanti Nengyanti, Nengyanti Niar Astaginy Niluh Desy Purnamasari Nono Darsono, Nono Nordianiwati, Nordianiwati Novi Wahyu Hidayati, Novi Wahyu Nur Hidayati Nur Kholis Nur Kholis Nurhayati Usman NURUL ANNISA Pakpahan, emma martina Pararuk, Ririn Lestari Parmi, Parmi Prasetyo, Agus Budi priandana, eka rakhman Pristi Sahida, Adelia Octora Putri Anggraeni R. Teduh Dirgahayu Rahmad Subekti Rahmaditullah, Rahmaditullah Ramba , Yonathan Ramba, Yonathan Rara' Damba, Mitra Ridar Hendri Rismawati, Dea Rizki, Hafizri Deni Rizky, Hafizri Deni RR. Ella Evrita Hestiandari Salsabila Purnamasari Santosa, Tomi Apra Satrio Herbirowo, Satrio Sefrin Siang Tangkearung Setiaji, Hari Shafira Syakhnur Silaban, Yunita Feronika Br. Silitonga, Rahmi Julita Hotmaria Br. Silitubun, Evaristus Sitorus, Jenti Sjroida, Diah Fatma Soeryani, R Wianti Soesaptri Oediyani Sri Endang Kornita SRI RAHAYU Sudibio, Sudibio sudirman palaloi Sudirman Sudirman Sugiarti, Viki Sumanik, Ermi Dikta SUMIYATI SUMIYATI Supirno, Supirno Susanna Vonny N. Rante Susanto, Yohanes Sutrisnawati, Ika Suwardiman, Suwardiman Suwarno, Tri Suwarto Sunandar Syahid, Adi Noer Tadius Tamba, Orita Nadia Tang, Aco Tanga, Irma Yanti Teady Matius Surya Mulyana, Teady Matius Teduh Dirgahayu Teduh Dirgahayu Tince Sofyani Tititing, Andri Stepahnie Tongam E Panggabean Topanus Tulak Tulak, Harmelia Ufira Isbah Ulfa Amalia Nur Fatimah Unggul Priyadi Utami, Kurniati Dwi Utami, Lusia Savitri Setyo Veli Sungono Wahyu Mayangsari Windarsyah Windarsyah Wisran Wiwik Handayani Yanti Andriani, Neneng Yeoh, Rudiyo Yudomustafa, Fakhruddin Yulianda, Eni Yuslinda, Yuslinda Zaenul Amri Zulkarnain Zulkarnain