PENGARUH STACK PORI SEJAJAR BERBAGAI BAHAN TERHADAP PERUBAHAN SUHU PADA SISTEM PENDINGIN TERMOAKUSTIK GELOMBANG BERDIRI DAN GELOMBANG BERJALAN; THE INFLUENCE OF DIFFERENT MATERIALS PARALLEL PORE STACKS TO TEMPERATURE CHANGE ON A STANDING WAVE AND TRAVELING WAVE THERMOACOUSTIC COOLING SYSTEM

Rossy Lydia Ellyana, Agung Bambang Setio Utomo

2014 | Disertasi | PROGRAM STUDI S2 ILMU FISIKA

A research on the influence of different materials paralle pore stack to temperature change on a standing wave and traveling wave thermoacoustic cooling system has been done. Parallel pore stack used in this research is acrylic, MDF and polyfoam substances. Using the stack of acrylic and MDF (medium density fibreboard), the resonance frequency is slightly shifted from (99 ± 1) Hz to (97 ± 1) Hz whereas by using polyfoam stack, the resonance frequency is shifted from (99 ± 1) Hz to (103 ± 1) Hz. The best stack of materials produced in the standing wave thermoacoustic system is a polyfoam stack with the decreasing temperature is around (7,4 ± 0,1) °C. On the other hand the optimum length for each stack is (7,80 ± 0,1) cm. The usege of polyfoam stack for loudspeaker power variations on the standing wave and traveling wave thermoacoustic system resulted an optimum temperature decrease at 60 W. Using polyfoam stack as a result better the optimum temperature for the standing wave thermoacoustic system than that of traveling wave thermoacoustic system. The optimum decreasing temperature of a standing wave thermoacoustic system is around (7,4 ± 0,1) °C while a traveling wave thermoacoustic system is around (4,9 ± 0,1) °C for the optimum decreasing temperature.

Kata Kunci : thermoacoustic, standing wave, traveling wave and stack.