scholarly journals Influence of resonator length on the performance of standing wave thermoacoustic prime mover

2016 ◽  
Author(s):  
Wahyu Nur Achmadin ◽  
Ikhsan Setiawan ◽  
Agung Bambang Setio Utomo ◽  
Makoto Nohtomi
Keyword(s):  
Standing Wave ◽  
Prime Mover ◽  
Resonator Length

Influence of working fluid on the performance of a standing-wave thermoacoustic prime mover

Cryogenics ◽  
2011 ◽  
Vol 51 (9) ◽  
pp. 559-561 ◽  
Author(s):  
X.H. Hao ◽  
Y.L. Ju ◽  
Upendra Behera ◽  
S. Kasthurirengan
Keyword(s):  
Standing Wave ◽  
Working Fluid ◽  
Prime Mover

Optimum packing factor of the stack in a standing-wave thermoacoustic prime mover

2002 ◽  
Vol 26 (8) ◽  
pp. 729-735 ◽  
Author(s):  
Limin Qiu ◽  
Guobang Chen ◽  
Ning Jiang
Keyword(s):  
Standing Wave ◽  
Prime Mover ◽  
Packing Factor

scholarly journals Porous Cores in Small Thermoacoustic Devices for Building Applications

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2941 ◽  
Author(s):  
Fabio Auriemma ◽  
Elio Di Giulio ◽  
Marialuisa Napolitano ◽  
Raffaele Dragonetti
Keyword(s):  
Numerical Procedure ◽  
Acoustic Power ◽  
Prime Mover ◽  
Heat Power ◽  
Resonator Length ◽  
Design Constraints ◽  
Main Design ◽  
The Core ◽  
Suitable Solution ◽  
Fixed Input

The thermoacoustic behavior of different typologies of porous cores is studied in this paper with the goal of finding the most suitable solution for small thermoacoustic devices, including solar driven air coolers and generators, which can be used in future buildings. Cores provided with circular pores, with rectangular slits and with arrays of parallel cylindrical pins are investigated. For the type of applications in focus, the main design constraints are represented by the reduced amount of the input heat power and the size limitations of the device. In this paper, a numerical procedure has been implemented to assess the behavior of the different core typologies. For a fixed input heat power, the maximum acoustic power delivered by each core is computed and the corresponding engine configuration (length of the resonator and position of the core) is provided. It has been found that cores with parallel pins provide the largest amount of acoustic power with the smallest resonator length. This conclusion has been confirmed by experiments where additive manufactured cores have been tested in a small, light-driven, thermoacoustic prime mover.

Experimental study on performance of standing-wave thermoacoustic engine at different tilted angles and resonator length

2018 ◽  
Author(s):  
Rinasa Agistya Anugrah ◽  
Adhika Widyaparaga ◽  
I. Made Miasa ◽  
Joko Waluyo ◽  
Sugiyanto ◽  
...  
Keyword(s):  
Experimental Study ◽  
Standing Wave ◽  
Thermoacoustic Engine ◽  
Resonator Length

Relation between Acoustic Impedance and Sound Intensity Amplification in a Stack of Standing-Wave Thermoacoustic Prime Mover

2012 ◽  
Vol 51 ◽  
pp. 07GE02 ◽  
Author(s):  
Kazuki Sahashi ◽  
Shin-ichi Sakamoto ◽  
Kentaro Kuroda ◽  
Yoshiaki Watanabe
Keyword(s):  
Standing Wave ◽  
Acoustic Impedance ◽  
Sound Intensity ◽  
Prime Mover

scholarly journals Experimental Study of Resonance Frequency at Prime Mover Thermoacoustic Standing Wave

2017 ◽  
Vol 1 (2) ◽  
pp. 157
Author(s):  
Danang D. Cahyadi ◽  
Yoga N. Adhitama ◽  
Ikhsan Setiawan ◽  
Agung B. S. Utomo
Keyword(s):  
Experimental Study ◽  
Resonance Frequency ◽  
Penetration Depth ◽  
Second Order ◽  
Acoustic Energy ◽  
Prime Mover ◽  
Resonator Length ◽  
First Order ◽  
Resonance Frequencies ◽  
Prime Movers

<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>

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

2016 ◽  
Vol 710 ◽  
pp. 012031 ◽  
Author(s):  
Ikhsan Setiawan ◽  
Wahyu N. Achmadin ◽  
Prastowo Murti ◽  
Makoto Nohtomi
Keyword(s):  
Experimental Study ◽  
Standing Wave ◽  
Prime Mover

Numerical Analysis of the Performance of an Adjustable Thermoacoustically-Driven Thermo-Acoustic Refrigerator

2019 ◽  
Author(s):  
A. C. Alcock ◽  
S. Balonji ◽  
L. K. Tartibu
Keyword(s):  
Standing Wave ◽  
Sound Wave ◽  
Coefficient Of Performance ◽  
Cooling Power ◽  
Performance Parameters ◽  
Design Environment ◽  
Resonator Length ◽  
Low Amplitude ◽  
The Relationship ◽  
Initial Results

Abstract Thermo-acoustic refrigeration could potentially become an alternative option to current traditional refrigeration systems provided that the issue related to its efficiency is addressed. One of the incentives for developing this technology is the opportunity it establishes with respect to the use of a sustainable heat source to induce cooling. Many existing works have pointed out the relationship between the geometrical configuration of the device and its performance. Mainly, the stack geometry and position have been the focus of these previous works. In this work, a standing-wave ThermoAcoustically-Driven Thermo-Acoustic Refrigerator with an adjustable resonator has been developed. Hence the device is made of two portions, joined with an adjustable duct, namely a simple standing-wave thermo-acoustic engine that converts heat into a sound wave and a simple thermo-acoustic refrigerator where heat pumping takes place. The Design Environment for Low-amplitude ThermoAcoustic Energy Conversion (DELTAEC) was used to model and analyze the influence of the adjustment of the resonator on the cooling performance. Parameters like the temperature difference across the stack, the frequency of the acoustic sound wave generated, the cooling power and the coefficient of performance have been studied. The initial results reported in this study show the possibility to change the performance of practical TADTAR by adjusting the resonator length.

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