Experimental Study on a Standing Wave Thermoacoustic Prime Mover with Air Working Gas at Various Pressures

Setiawan, Ikhsan; Achmadin, Wahyu Nur; Murti, Prastowo; Nohtomi, Makoto

doi:10.1088/1742-6596/710/1/012031

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…Terdapat dua jenis piranti yang membedakan termoakustik, yaitu mesin kalor termoakustik (thermoacoustic heat engine), yaitu mesin dengan perbedaan suhu sebagai sumbernya dapat menghasilkan gelombang akustik dan mesin pendingin termoakustik (thermoacoustic refrigerator), yaitu mesin dengan gelombang akustik sebagai sumbernya dapat menghasilkan perbedaan suhu. [9] Adapun beberapa keunggulan dari teknologi piranti termoakustik ini adalah ramah lingkungan, lebih murah, komponen mesin yang tidak bergerak (no moving part) [10]. Dalam penelitian ini, penulis ingin memperlihatkan bahwa piranti ini mampu dibuat dikarenakan bahan yang digunakan merupakan komponen yang terjangkau dan murah.…”

Section: Pendahuluanunclassified

Kinerja Piranti Pendingin Termoakustik Gelombang Tegak Pada Tebal Susunan Stack Berbeda

Achmadin

2020

Journal Technology of Civil, Electrical, Mechanical, Geology, M

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Rusaknya lapisan ozon merupakan dampak langsung dari penggunaan refigerant terhadap lingkungan, sehingga untuk mengurangi dampak tersebut diperlukan sebuah teknologi yang ramah lingkungan. Piranti termoakustik merupakan salah satu dari beberapa teknologi ramah lingkungan yang memiliki fungsi yang sama yaitu dengan memanfaatkan perbedaan suhu sebagai sumber dari fenomena termoakustik. Medium yang digunakan adalah gas udara sehingga tidak menyebabkan bahaya pada lingkungan. Komponen utama piranti termoakustik terdiri dari regenerator, pipa resonator dan loudspeaker. Regenerator memiliki peranan yang besar yaitu sebagai tempat konversi energi terjadi. Penelitian ini akan membahas tentang pengaruh ketebalan stack yang terpasang di dalam regenerator pada kinerja piranti pendingin termoakustik gelombang tegak. Bahan yang digunakan adalah mesh ukuran #18 yang disusun rapat dengan ketebalan 4 cm sampai 5,5 cm dengan interval 0,5 cm. Waktu pengoperasian dilakukan selama 30 menit. Pipa resonator terbuat dari pipa PVC. Hasil penelitian ini menunjukkan bahwa ketebalan stack memiliki pengaruh terhadap penurunan suhu. Penurunan suhu terbesar dalam penelitian ini terjadi pada panjang stack 5,5 cm yang mampu menurunkan 4,7 C dari suhu awal penelitian. Kata kunci: termoakustik, gelombang tegak, regenerator

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Section: Pendahuluanunclassified

Kinerja Piranti Pendingin Termoakustik Gelombang Tegak Pada Tebal Susunan Stack Berbeda

Achmadin

2020

Journal Technology of Civil, Electrical, Mechanical, Geology, M

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“…For heat engine or generator, the system is usually driven by a temperature gradient known as the onset temperature that developed between the two ends of the regenerator/porous structure [19]. The onset temperature creates wave that travels inside the resonator and the displacement of the wave can be converted into useful electricity by using suitable energy conversion device [20].…”

Section: Introductionmentioning

confidence: 99%

“…In most reported work, the turbines that were investigated were relatively big in size [23][24][25]. However, most thermoacoustic devices were built by using standard small sizes pipes [17][18][19]. In fact, most technology are nowadays becoming small in size and small size operations are usually different compared to the big devices [22].…”

Section: Introductionmentioning

confidence: 99%

A 3D Printed bi-directional Turbine for Thermoacoustic Standing Wave Environment at an Atmospheric Pressure

Fatimah Al Zahrah Mohd Saat

2024

AREFMHT

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This paper reports a study on the use of an in-house 3D printed bi-directional turbine for energy conversion in a standing wave thermoacoustic environment that is operated at an atmospheric pressure. The 3D printed turbine was placed at two locations along the resonator and the data were recorded for several range of flow frequency and flow amplitude. It is found that maximum output is achieved when flow is not at resonance. Resonance of the standing wave inside the rig was found at 106 Hz but the bi-directional turbine performs better at a lower frequency of 85 Hz.

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“…Thermoacoustic devices have attracted the interest and attention of scientists in recent decades because they are environmentally friendly, have simple structure and high reliability, and can be made and maintained easily (Setiawan, 2016). The operation of thermoacoustic prime movers can use sunlight (Chen & Garret, 1998;Adeff & Hoffler, 2000) or waste heat (Gardner & Howard, 2009) as the source of thermal energy, and does not produce any exhaust gases such as carbon dioxide as in conventional machines.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Resonance Frequency at Prime Mover Thermoacoustic Standing Wave

Cahyadi

Adhitama

Setiawan

et al. 2017

J. Phys.: Theor. Appl.

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<p class="Abstract">Thermoacoustic prime movers work by using thermal energy to produce acoustic energy in the form of sound wave through thermoacoustic effect which occurs in a porous medium called stack. This paper describes an experimental study on the relation between the order of resonance frequencies generated by a thermoacoustic prime mover and the length of the resonator and the viscous penetration depth. Extending the resonator length will decreasing the resonance frequency which result in the increasing in the viscous penetration depth. Generally, the generated sound consists of only one frequency, that is the first-order one. However, under certain conditions, the sound has only the second-order frequency or comprises two frequencies of the first-order and second-order resonance frequencies. This phenomenon can be explained by considering the comparison between the effective hydraulic radius of stack () and the viscous penetration depth (). It is found that the first-order frequency appears when , while when (with calculated by using the first-order frequency) then the second order frequency is produced so that is back to a smaller value and therefore the condition of is recovered. In addition, when of the thermoacoustic prime mover will<em> </em>generate the first and second order frequencies together.</p>

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Experimental Study on a Standing Wave Thermoacoustic Prime Mover with Air Working Gas at Various Pressures

Cited by 10 publications

References 5 publications

Kinerja Piranti Pendingin Termoakustik Gelombang Tegak Pada Tebal Susunan Stack Berbeda

Kinerja Piranti Pendingin Termoakustik Gelombang Tegak Pada Tebal Susunan Stack Berbeda

A 3D Printed bi-directional Turbine for Thermoacoustic Standing Wave Environment at an Atmospheric Pressure

Experimental Study of Resonance Frequency at Prime Mover Thermoacoustic Standing Wave

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