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Title : Influence of Pressure Variation of Air Working Gas on the Onset Temperature Difference and Electric Power Output of a Standing Wave Thermoacoustic Electricity Generator
Author :

TUTUR URIP (1) Ikhsan Setiawan, S.Si., M.Si. (2) Prof. Dr. Agung Bambang Setio Utomo, S.U. (3)
Date : 24 2022
Keyword : thermoacoustic, electricity,generator,working gas thermoacoustic, electricity,generator,working gas
Abstract : A thermoacoustic electricity generator is a combination of a thermoacoustic prime mover and an electroacoustic transducer which converts thermal energy into acoustic work and then into electric energy. This machine has the potential to become an inexpensive and environmentally friendly technology because of its simple construction and it does not generate any burnout gases and allow use of waste heat as the heat source. This paper describes an experimental study of the effect of the pressure variations of air as a working gas in the range of 0.10 MPa to 0.55 MPa on the onset temperature difference and output electric power generated by a standing wave thermoacoustic electricity generator. The device has a resonator length of 1.55 m and a stack made of wire meshes screen as a mesh number of 12. The length of the stack was 35 mm. An 8-inch loudspeaker with 8 Ω impedance was used as the electroacoustic transducer. The experiment was done by using 370 W heat input, and the output voltage was measured on the 8 Ω load resistor. It was found that the smallest onset temperature difference of 347 ℃ was obtained when the air pressure was 0.35 MPa, and the highest root-mean-square electric power of around 691 mW was reached when the air pressure was 0.40 MPa. Thus, the pressure of air as a working gas of from around 0.35 MPa to 0.40 MPa is the best operating pressure for the thermoacoustic electricity generator in this research.
Group of Knowledge :
Level : Internasional
Status :
Published
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