The Influence of Heat Input Ratio on Electrical Power Output of a Dual-Core Travelling-Wave Thermoacoustic Engine

Kisha, Wigdan; Riley, Paul H; Mckechnie, Jon; Hann, David

Abstract

This paper presents an analytical and experimental investigation of an electricity generator that employs a two-stage looped tube travelling-wave thermoacoustic prime-mover to deliver acoustic power from heat energy, a loudspeaker to extract electricity from sound energy and a tuning stub to compensate the changes in the acoustic field within the engine to enable close to travelling wave operation at the loudspeaker. Furthermore, the paper explains how to enhance the output power utilizing different heat input ratios through the engine cores. A well-known thermoacoustic design tool called DeltaEC is used to simulate the wave propagation through the different parts of the system. The electrical power predicted from the low-cost prototype was 24.4 W acoustic power which confirms the potential for developing low-cost thermoacoustic electricity generator for heat recovery from low-grade heat sources. The electrical power can be increased to 31.3 W using different heating power percentages through the two units. The verified experimental data shows good agreement with DeltaEC results.

Citation

Kisha, W., Riley, P. H., Mckechnie, J., & Hann, D. (2018). The Influence of Heat Input Ratio on Electrical Power Output of a Dual-Core Travelling-Wave Thermoacoustic Engine. In HEAT POWERED CYCLES 2018 conference proceedings (67-74)

• Presentation Conference Type: Conference Paper (Published)
• Conference Name: The 8th Heat Powered Cycles Conference
• Start Date: Sep 16, 2018
• End Date: Sep 19, 2018
• Acceptance Date: Feb 7, 2018
• Online Publication Date: Mar 7, 2019
• Publication Date: Sep 13, 2018
• Deposit Date: Jun 24, 2021
• Publicly Available Date: Jul 22, 2021
• Pages: 67-74
• Book Title: HEAT POWERED CYCLES 2018 conference proceedings
• ISBN: 9780956332967
• Keywords: Regenerator, thermoacoustic, acoustic power, loudspeaker as a generator, DeltaEC
• Public URL: https://nottingham-repository.worktribe.com/output/5721598
• Publisher URL: https://heatpoweredcycles.org/wp-content/uploads/2018/11/Conference-Proceedings-HPC-2018.pdf
• Related Public URLs: https://heatpoweredcycles.org/8th-hpc-in-bayreuth