New method to analyse and optimise thermoacoustic power generators for the recovery of residual energy
| Autor: | Jordi Vinolas, José Luis Olazagoitia, Carmen Iniesta, Jaime Gros |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Stirling engine
Thermoacoustic Stirling engine Computer science 020209 energy Flow (psychology) 02 engineering and technology 01 natural sciences Automotive engineering 010305 fluids & plasmas law.invention law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Traveling-wave phasing Reactive power flow Circuit analogy General Engineering Feedback branch optimisation Engineering (General). Civil engineering (General) Sound power Phaser Variable (computer science) Electricity generation Residual energy TA1-2040 Thermoacoustic heat engine |
| Zdroj: | Alexandria Engineering Journal, Vol 59, Iss 5, Pp 3907-3917 (2020) |
| ISSN: | 1110-0168 |
| DOI: | 10.1016/j.aej.2020.06.046 |
| Popis: | The analysis of thermoacoustic engines and the equations that describe the internal physical phenomena are far from simple. Previous studies on energetic characterisation of thermoacoustic engines are based only on the determination of the active acoustic power flow distribution. In this paper, another variable, known as the reactive acoustic power, is additionally estimated and studied. This article proposes a simple method which is based on the combination of both active and reactive acoustic power flow for the evaluation and optimisation of thermoacoustic Stirling engines. In addition the paper illustrates the method using a thermoacoustic Stirling engine demonstrator design which is able to fit three different feedback branches. The results show that the amount of reactive acoustic power supplied towards the core branch differs depending on the specifications of the selected feedback branch. Besides, the amount of reactive acoustic power distributed towards the core branch is a good indicator of the grade of traveling-wave phasing. An improvement of 16.4% in the active acoustic power towards the extraction branch is achieved and besides, the amplification of the active acoustic power through the core branch has increased by 12%. The method can serve as an effective tool to study and optimise thermoacoustic devices. |
| Databáze: | OpenAIRE |
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