• Shivakumara N V
• Bheemsha Ayra

In this experimental study, Poly-Vinyl-Chloride (PVC) has been used to fabricate all the structural parts of the Thermoacoustic Refrigerator (TAR) including the resonator system to minimize the conduction heat losses between the refrigerator and the surroundings. In this work, three parallel plate stacks are used to study the performance of TAR by considering different porosity ratios by varying the gap between the parallel plates (0.28 mm, 0.33 mm, and 0.38 mm). The parallel plate stacks are constructed by using aluminum and mylar sheets and Air is used as the working. Present research deals with the study of performance of thermoacoustic refrigerator of 10W cooling power for different operating conditions with a constant mean operating pressure of 8 bar. The experiments are conducted for three drive ratios of 0.6%, 1% and 1.6% with an operating frequencies of 200 – 600 Hz and cooling load of 2W – 10W. The effect of different parameters on the performance of thermoacoustic refrigerator such as operating frequency, cooling load and drive ratios are studied. Experimental results shows that the lowest temperature measured at cold heat exchanger is 1.91 oC while the hot heat exchanger temperature is maintained between 31 oC – 32 oC. The highest value of temperature difference (∆T) measured is 29.44 oC which shows the improvement of about 32% increase in the temperature difference than the previous findings where aluminum resonator is used. The highest Coefficient of Performance (COP) and the Relative Coefficient of Performance (COPR) are found to be 1.490 and 0.137 respectively.

Thermoacoustic Refrigerator; Drive Ratio; Parallel Plate Stack; COP; COPR; Temperature Difference

"Effect of Spacing in a Parallel Plate Stack on the Performance of Thermoacoustic Refrigerator made up of PVC for an Operating Pressure of 8 bar using Air as a Working Medium", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.1063-1069, January-2019, Available :http://www.jetir.org/papers/JETIR1901C48.pdf

"Effect of Spacing in a Parallel Plate Stack on the Performance of Thermoacoustic Refrigerator made up of PVC for an Operating Pressure of 8 bar using Air as a Working Medium", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp1063-1069, January-2019, Available at : http://www.jetir.org/papers/JETIR1901C48.pdf