PENENTUAN KONDISI OPTIMUM PANJANG PIPA RESONATOR DAN DAYA INPUT LISTRIK TERHADAP KINERJA PRIME MOVER TERMOAKUSTIK GELOMBANG BERDIRI; DETERMINATION OPTIMUM CONDITION OF PIPE RESONATOR LENGTH AND ELECTRIC POWER INPUT ON THE PERFORMANCE OF STANDING WAVE THERMOACOUSTIC PRIME MOVER

WAHYU NUR ACHMADIN, Agung Bambang Setio Utomo

2015 | Disertasi | FMIPA

A research on the determination optimum condition of pipe resonator length and electric power input on the performance of standing wave thermoacoustic prime mover engine has been conducted. The principle of thermoacoustic prime mover is to transfer the heat from high temperature to low temperature and produce a work in the form of sound waves. The thermoacoustic prime mover engine consists of a heater electric, a pipe resonator, and a stack. Stack was made of some stainless wire mesh sheets forming 5 cm long with a size of 5 cm thick by mesh #14 and then placed 13 cm from resonator hot-end. Pipe resonator are made of stainless steel pipes of 6.8 cm diameter. Heater electric was used has a diameter of 6.8 cm and a maximum power capability of 400 W within stainless steel pipes. The length of pipe resonator and the electric power input was varied to find the best result. Pipe resonator which have length of 155 cm with an electric power input of 400 W produce the smallest difference onset temperature and the smallest time to reach onset condition (fastest) is (251 ? 4) ºC and (308 ? 4) s, respectively. Pipe resonator which have length of 105 cm produces the largest sound waves frequency that is (173.7 ? 0.6) Hz. The pipe resonator of 180 cm with an electric power input of 266 W produce the largest pressure amplitude is (4.4 ? 0.2) kPa. The pipe resonator of 205 cm with an electric power input of 266 W produce the largest acoustic power and efficiency is (4.2 ? 0.7) W and (1.6 ? 0.3) %, respectively.

Kata Kunci : mesh, prime mover, stainless steel, and thermoacoustic