195 Onset conditions for a thermoacoustic engine to operate a thermoacoustic cooler

2015 ◽  
Vol 2015.64 (0) ◽  
pp. _195-1_-_195-2_
Author(s):  
Teruyuki KOZUKA ◽  
Kyuichi YASUI ◽  
Masaki YASUOKA ◽  
Kazumi KATO ◽  
Motoharu SUZUKI ◽  
...  
Keyword(s):  
Thermoacoustic Engine ◽  
Thermoacoustic Cooler

scholarly journals The effect of mean pressure on the performance of a single-stage heat-driven thermoacoustic cooler

2020 ◽  
Vol 15 (3) ◽  
pp. 471-476
Author(s):  
Irna Farikhah
Keyword(s):  
High Efficiency ◽  
Waste Heat ◽  
Heating Temperature ◽  
Acoustic Power ◽  
Environmental Issue ◽  
Thermoacoustic Engine ◽  
Limit Value ◽  
The World ◽  
Mean Pressure ◽  
Thermoacoustic Cooler

Abstract Waste heat is an environmental issue in the world. There are some technologies that can be used to recovery the waste heat, one of which is thermoacoustic cooler technology. Thermoacoustic technology can be divided into two parts: one is thermoacoustic engine and cooler. To design the cooler system having high efficiency and lower onset heating temperature, the effect of mean pressure is investigated. By increasing mean pressure from 0.5 to 3 MPa, the heating temperature generating acoustic power can be decreased from 831 to 580 K. Moreover, 15% of Thermodynamic upper limit value of the whole cooler system is achieved.

Simulation of a standing-wave thermoacoustic engine using compressible SIMPLE algorithm

2010 ◽  
Author(s):  
Dongwei Zhang ◽  
Yaling He ◽  
Yong Wang ◽  
Jing Huang ◽  
Liejin Guo ◽  
...  
Keyword(s):  
Standing Wave ◽  
Simple Algorithm ◽  
Thermoacoustic Engine

Modeling of Thermoacoustic Resonators With Nonuniform Medium and Boundary Conditions

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Konstantin I. Matveev ◽  
Sungmin Jung
Keyword(s):  
Boundary Conditions ◽  
Acoustic Power ◽  
Solid Surfaces ◽  
Small Scale ◽  
Nonuniform Medium ◽  
Thermoacoustic Engine ◽  
Efficient Calculation ◽  
Thermoacoustic Engines ◽  
The Subject ◽  
Low Amplitude

The subject of this paper is modeling of low-amplitude acoustic fields in enclosures with nonuniform medium and boundary conditions. An efficient calculation method is developed for this class of problems. Boundary conditions, accounting for the boundary-layer losses and movable walls, are applied near solid surfaces. The lossless acoustic wave equation for a nonuniform medium is solved in the bulk of the resonator by a finite-difference method. One application of this model is for designing small thermoacoustic engines. Thermoacoustic processes in the regular-geometry porous medium inserted in resonators can be modeled analytically. A calculation example is presented for a small-scale thermoacoustic engine coupled with an oscillator on a flexing wall of the resonator. The oscillator can be used for extracting mechanical power from the engine. A nonuniform wall deflection may result in a complicated acoustic field in the resonator. This leads to across-the-stack variations of the generated acoustic power and local efficiency of thermoacoustic energy conversion.

scholarly journals Performance of a liquid‐sodium thermoacoustic engine

1988 ◽  
Vol 84 (S1) ◽  
pp. S37-S37 ◽  
Author(s):  
A. Migliori ◽  
G. W. Swift
Keyword(s):  
Liquid Sodium ◽  
Thermoacoustic Engine
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