scholarly journals Demonstrating of a Standing Wave - Thermoacoustic Refrigerator

2013 ◽  
Vol 06 (2) ◽  
Keyword(s):  
Temperature Variation ◽  
Standing Wave ◽  
Cfd Simulation ◽  
Plate Thickness ◽  
Full Description ◽  
Thermoacoustic Refrigerator

This manuscript begins with a full description of Thermoacoustic Refrigerator (TAR) technology followed an analysis of the elements necessary for successfully designing the various components of a TAR. The authors developed and tested a standing wave thermoacoustic refrigerator (TAR) to study the effects of stack plate thickness, load and stack temperature variation on TAR performance. They then used a CFD simulation to simulate the performance of the TAR, particularly the temperature and velocity within.

Performance Evaluation of a Standing Wave Thermoacoustic Refrigerator Using Normalized Sensitivity Coefficients

2020 ◽  
Vol 13 (3) ◽  
Author(s):  
Umar Nawaz Bhatti ◽  
Salem Bashmal
Keyword(s):  
Sensitivity Analysis ◽  
Standing Wave ◽  
Plate Thickness ◽  
Sensitivity Coefficient ◽  
Coefficient Of Performance ◽  
Model Parameters ◽  
Pressure Amplitude ◽  
Performance Parameters ◽  
Wide Range ◽  
Thermoacoustic Refrigerator

Abstract The sensitivity analysis using normalized sensitivity coefficient (NSC) can be used to identify important model parameters affecting the device performance by allowing one-to-one comparison. The results are highlighted in the form of order of magnitudes change in output for a unit change in input variable. In this study, the sensitivity analysis of a small capacity standing wave thermoacoustic refrigerator (SWTAR) has been performed using NSC. Specialized tool deltaec has been used to generate the results for the subsequent sensitivity analysis. Three key performance parameters, i.e., temperature difference achieved (ΔT), coefficient of performance (COP), and relative coefficient of performance (COPR) have been analyzed for perturbations in number of device variables, namely, oscillating pressure amplitude, two different stack material properties and four stack geometric parameters, i.e., stack length, stack center position, stack plate thickness, and half stack spacing. Sensitivity results are obtained for a wide range of mean operating pressures (Pm), mean operating temperature (Tm), and drive ratios (DRs). It has been found that performance parameters are most sensitive to the perturbations in oscillating pressure amplitude and least affected by the perturbations in the stack length. With respect to the oscillating pressure amplitude, maximum NSC of 24.12 has been reported for ΔT at mean pressure of 5 bar.

scholarly journals The Influence of Stack Position and Acoustic Frequency on the Performance of Thermoacoustic Refrigerator with the Standing Wave

2017 ◽  
Vol 38 (4) ◽  
pp. 89-107 ◽  
Author(s):  
Jakub Kajurek ◽  
Artur Rusowicz ◽  
Andrzej Grzebielec
Keyword(s):  
Standing Wave ◽  
Temperature Difference ◽  
Heat Exchangers ◽  
Acoustic Power ◽  
Working Fluid ◽  
Parallel Plates ◽  
Acoustic Frequency ◽  
Plate Spacing ◽  
Resonance Frequencies ◽  
Thermoacoustic Refrigerator

Abstract Thermoacoustic refrigerator uses acoustic power to transport heat from a low-temperature source to a high-temperature source. The increasing interest in thermoacoustic technology is caused due to its simplicity, reliability as well as application of environmentally friendly working fluids. A typical thermoacoustic refrigerator consists of a resonator, a stack of parallel plates, two heat exchangers and a source of acoustic wave. The article presents the influence of the stack position in the resonance tube and the acoustic frequency on the performance of thermoacoustic refrigerator with a standing wave driven by a loudspeaker, which is measured in terms of the temperature difference between the stack edges. The results from experiments, conducted for the stack with the plate spacing 0.3 mm and the length 50 mm, acoustic frequencies varying between 100 and 400 Hz and air as a working fluid are consistent with the theory presented in this paper. The experiments confirmed that the temperature difference for the stack with determined plate spacing depends on the acoustic frequency and the stack position. The maximum values were achieved for resonance frequencies and the stack position between the pressure and velocity node.

scholarly journals Numerical analysis of a standing-wave thermoacoustic refrigerator by one-dimensional simulation

2019 ◽  
Vol 85 (869) ◽  
pp. 18-00268-18-00268
Author(s):  
Rin IRIE ◽  
Sotaro IWAMOTO ◽  
Ken KAKITA ◽  
Seiichi TANAKA ◽  
Seiji FUJIWARA
Keyword(s):  
Numerical Analysis ◽  
Standing Wave ◽  
One Dimensional ◽  
Dimensional Simulation ◽  
Thermoacoustic Refrigerator

Experimental research of high frequency standing wave thermoacoustic refrigerator driven by loudspeaker

2012 ◽  
Author(s):  
Zhang Chunping ◽  
Liu Wei ◽  
Yang Zhichun ◽  
Li Zhengyu ◽  
Zhang Xiaoqing ◽  
...  
Keyword(s):  
Standing Wave ◽  
Experimental Research ◽  
High Frequency ◽  
Thermoacoustic Refrigerator
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