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Ikhsan Setiawan
Physics Departement, Faculty Of Mathematics And Natural Sciences Universitas Gadjah Mada, Sekip Utara BLS 21 Yogyakarta 55281 Indonesia
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Journal : International Journal of Renewable Energy Development

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Analysis of a standing wave thermoacoustic engine with multiple unit stages Murti, Prastowo; Setiawan, Ikhsan; Rosafira, Jihan Zeinyuta; Widyaparaga, Adhika; Astuti, Wijayanti Dwi; Biwa, Tetsushi
International Journal of Renewable Energy Development Vol 13, No 4 (2024): July 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.60098

Abstract

The thermoacoustic engine is an eco-friendly technology capable of harnessing solar and waste energy for electricity generation, in conjunction with a linear alternator, and can function as a heat pump. This engine type holds significant appeal due to its simplistic design, devoid of any mechanical moving components, comprising only a stack sandwiched between heat exchangers within a resonator. When the temperature gradient across the stack reaches the critical threshold (onset temperature), the working gas undergoes spontaneous oscillation. Typically, a high onset temperature is necessary to induce gas oscillation in a thermoacoustic engine due to viscous losses within the system. A method to lower the onset temperature by increasing the number of unit stages consisting of stacks and heat exchangers so that the engine can utilize low-grade thermal sources has been developed to overcome this challenge. However, this method has only been applied to traveling-wave thermoacoustic engines. Its application in standing-wave engines, which offer a more compact and straightforward structure, remains unexplored. This research aims to examine how the number of unit stages in a standing-wave thermoacoustic engine influences the onset temperature and acoustic field. The onset temperature is estimated using a fundamental hydrodynamics equation and the investigation of the acoustic field throughout the engine using DeltaEC software. Results showed that the strategic positioning of multiple unit stages is essential to achieve a low onset temperature. The minimum onset temperature, approximately 92°C, is obtained when three- or four-unit stages are installed. Additionally, increasing the number of unit stages does not affect the acoustic impedance and phase difference between pressure and velocity in the stack, while simultaneously enhancing both acoustic power output and thermal efficiency.
Co-Authors Abdul Chalim Abdul Chalim, Abdul Adhika Widyaparaga Agung B. S. Utomo Agung B. S. Utomo Agung Bambang S Utomo Agung Bambang Setio Utomo Agung Bambang Setio Utomo Amalia, Astrifidha Rahma Astrifidha Rahma Amalia Astuti, Wijayanti Dwi B.S. Utomo Bayu Sujadmiko, Bayu Biwa, Tetsushi Danang D Cahyadi Davey, Orima Melati Desia Rakhma Banjarani Elvis, Elvis Eni Rustianingsih Fadloli Fadloli, Fadloli Farida Akbarina Hedwigis Harindra Heni Siswanto Hudati, Imroatul IRSYADI, FAKIH Isna Fitria Agustina Isnaini Rodiyah Khoirunisya, Siti Lailul Mursyidah M. Fakih Mahdewi, Risa Makoto Nohtomi, Makoto Mega C. Gupita Muhammad Fadly Mulaiyinatus Sifa Muslim, Shohib Natamiharja, Rudi Nurmansyah, Gunsu NURUL AZIZAH Otomo, Nobuhide Panjaitan, Oksha Dwi Anugrah Prastowo Murti Prastowo Murti, Prastowo Reliusman Dachi Rizqi Khoirunnisa Rosafira, Jihan Zeinyuta Sabatira, Febryani Solli Dwi Murtyas Untung Adi Santosa Wibowo, Bagas Wahyu Yoga Nur Adhitama Yuanita Fara Abdillah