Next Article in Journal
Inkjet-Printed and Paper-Based Electrochemical Sensors
Previous Article in Journal
Riding the Plane Wave: Considerations for In Vivo Study Designs Employing High Frame Rate Ultrasound
Article

Study of Standing-Wave Thermoacoustic Electricity Generators for Low-Power Applications

Department of Engineering, University of Messina, Contrada di Dio, Sant’Agata, 98166 Messina, Italy
Appl. Sci. 2018, 8(2), 287; https://doi.org/10.3390/app8020287
Received: 17 January 2018 / Revised: 2 February 2018 / Accepted: 13 February 2018 / Published: 14 February 2018
This paper is concerned with the study of low-cost, low-power thermoacoustic electricity generators. Based on target electrical output power values of 50 and 100 W, three standing wave prototypes (of both one-stage and two-stage prototypes) integrating a commercial loudspeaker with different coupling arrangements are conceived. Each stage consists of a square-pore stack sandwiched between hot and ambient heat exchangers. The working gas is air at atmospheric pressure. The prototypes’ efficiency in converting heat to electrical power is simulated by the specialized Design Environment for Low-Amplitude ThermoAcoustic Engines (DeltaEC) design tool based on the linear theory of thermoacoustics. At a given operation frequency, the optimal impedance matching between the loudspeaker and the engine is realized by adjusting both the engine parameters (stack location, stack length, heat exchangers length, loudspeaker location) and loudspeaker parameters (load resistance and box volume). Computations reveal that the one-stage engine and two-stage engine with loudspeakers coupled in side-branch mode are able to meet the target output power values with comparable thermal-to-electric efficiency (4.6%). The two-stage engine with the loudspeaker coupled in push–pull mode is unable to reach the desired power output and is characterized by low conversion efficiencies (2%) due to the poor loudspeaker–engine acoustic impedance matching. View Full-Text
Keywords: thermoacoustics; electricity generator; heat; acoustic power thermoacoustics; electricity generator; heat; acoustic power
Show Figures

Figure 1

MDPI and ACS Style

Piccolo, A. Study of Standing-Wave Thermoacoustic Electricity Generators for Low-Power Applications. Appl. Sci. 2018, 8, 287. https://doi.org/10.3390/app8020287

AMA Style

Piccolo A. Study of Standing-Wave Thermoacoustic Electricity Generators for Low-Power Applications. Applied Sciences. 2018; 8(2):287. https://doi.org/10.3390/app8020287

Chicago/Turabian Style

Piccolo, Antonio. 2018. "Study of Standing-Wave Thermoacoustic Electricity Generators for Low-Power Applications" Applied Sciences 8, no. 2: 287. https://doi.org/10.3390/app8020287

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop