Minor Losses Of Cone Segments Insertion Into Single Loop Thermoacoustic Engine Model

Nurpatria Nurpatria, Agus Dwi Catur


A thermoacoustic engine model has been built with Delta-EC simulation. This engine model is designed with a specific capability to utilize heat source from flue gas of low-grade biomass combustion. This engine model considered has a promising feature for low cost implementation according to the fact that the low-grade biomass abundantly available at rural area in the form of agricultural waste. This engine model is an improved version of a previous one, with the addition of two conical segments in two location at the engine’s loop. The cone segments lower the energy loss which in turn improve the overall performance of the engine, compared to the model installed with the straight segments. On a certain setting of the engine’s model parameters, their addition be able to slightly decreasing the acoustic energy loss occurred at loop ends and both cold and hot heat exchangers interface. The cone segments increase the engine performance by reducing the acoustic energy loss of 0.2 W, which is 0,3% lower than those with straight segment.  In general, overall heat to acoustic conversion efficiency of the model is slightly increase from 6.97% to 7.01%.


Themoacoustic Engine; Simulation; Acoustic Energy Loss; Cone Segment; Biomass

Full Text:



A. Sertolli, Z. Gabnai, P. Lengyel, and A. Bai, “Biomass potential and utilization in worldwide research trends - A bibliometric analysis,” Sustainability, vol. 14, no. 5515, 2022.

M. Elferink, and T. Steiner, “Thermoacoustic waste heat recovery engine - Comparison of simulation and experiment,” Proceedings of Meetings on Acoustics, vol. 35, no. 065002, 2019.

T. Yazaki, A. Iwata, T. Maekawa, and A. Tominaga, “Traveling wave thermoacoustic engine in a looped tube,” Physical Review Letters, Vol. 81, No. 15, October 1998.

S. Backhaus, and G.W. Swift, “A thermoacoustic Stirling heat engine - Detailed study,” Journal Acoustic Society of America, Vol. 107, No. 6, June 2000.

Nurpatria, I G.B. Susana, I W. Joniarta, Nurchayati, and H.S. Tira, “Peningkatan efisiensi konversi energi mesin termoakustik,” Prosiding SAINTEK LPPM Universitas Mataram, Vol. 3, pp.369-373, Januari 2021.

B. Ward, J. Clark, and G. Swift, Design Environment for Low-amplitude Thermoacoustic Energy Conversion (Delta EC) - Version 6.2 Users Guide, Los Alamos National Laboratory, December 2008.

G Swift, Thermoacoustics - A unifiying perspective for some engines and refrigerators, Condensed Matter and Thermal Physics Group - Los Alamos National Laboratory, 5th Draft, 2001.

M. Yiyi, X. Xiujuan, Y. Shaoqi, and L. Qing, “Study on minor losses around the thermoacoustic parallel stack in the oscillatory flow conditions,” Physics Procedia, No. 67, pp.485-490, 2015.

DOI: http://dx.doi.org/10.52155/ijpsat.v39.1.5374


  • There are currently no refbacks.

Copyright (c) 2023 Nurpatria Nurpatria

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.