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Paper Abstract and Keywords
Presentation 2012-01-26 10:30
A study on a working mechanism of Phase Adjuster in thermoacoustic systems -- Experimental investigation of an efficiency determinant focused on acoustic impedance --
Kazuki Sahashi (Doshisha Univ.), Shin-ichi Sakamoto (Univ. of Shiga Pref.), Manabu Inoue, Yoshiaki Watanabe (Doshisha Univ.) US2011-86
Abstract (in Japanese) (See Japanese page) 
(in English) For a practical use of thermoacoustic cooling systems, it is important to improve the energy conversion efficiency. The Phase Adjuster, which is a device of changing the inner diameter of system locally, improves the efficiency largely. However, it is necessary to understand the efficiency improvement factors because those are not fully explained. The acoustic field and the efficiency of thermoacoustic cooling systems are decided from some parameters: a frequency and a temperature ratio of both stack ends, and so on. In this paper, we investigated the efficiency determinant by dividing the system into two parts and measuring the complex acoustic impedance at the divided point of each partial part with changing such parameters. Consequently, the values of the complex acoustic impedance measured in each part were crossed on the complex plane. The cross-point represented the spontaneous oscillation condition of the system. Therefore, it is expected that the complex acoustic impedance measurement in the system divided into two parts is available as one of ways to understand the efficiency determinant of thermoacoustic cooling systems.
Keyword (in Japanese) (See Japanese page) 
(in English) Thermoacoustic cooling system / Energy conversion efficiency / Phase Adjuster / Frequency / Temperature ratio of both stack ends / Complex acoustic impedance / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 401, US2011-86, pp. 1-6, Jan. 2012.
Paper # US2011-86 
Date of Issue 2012-01-19 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EA US  
Conference Date 2012-01-26 - 2012-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Kansai Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics，and Related Topics 
Paper Information
Registration To US 
Conference Code 2012-01-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on a working mechanism of Phase Adjuster in thermoacoustic systems 
Sub Title (in English) Experimental investigation of an efficiency determinant focused on acoustic impedance 
Keyword(1) Thermoacoustic cooling system  
Keyword(2) Energy conversion efficiency  
Keyword(3) Phase Adjuster  
Keyword(4) Frequency  
Keyword(5) Temperature ratio of both stack ends  
Keyword(6) Complex acoustic impedance  
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Keyword(8)  
1st Author's Name Kazuki Sahashi  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Shin-ichi Sakamoto  
2nd Author's Affiliation University of Shiga Prefecture (Univ. of Shiga Pref.)
3rd Author's Name Manabu Inoue  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
4th Author's Name Yoshiaki Watanabe  
4th Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2012-01-26 10:30:00 
Presentation Time 30 minutes 
Registration for US 
Paper # US2011-86 
Volume (vol) vol.111 
Number (no) no.401 
Page pp.1-6 
#Pages 6 
Date of Issue 2012-01-19 (US) 

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