| Autor: |
Qi Yun, Pan Honghao, Shiyue Su, Qie Shen, Xin Qiao, Jie Zhang, Daming Sun |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Cryogenics. 120:103385 |
| ISSN: |
0011-2275 |
| DOI: |
10.1016/j.cryogenics.2021.103385 |
| Popis: |
As liquefied natural gas (LNG) is becoming a more and more vital role in the global energy market, the enormous amount of cold energy released during its regasification process has attracted worldwide attention. A three-stage traveling-wave thermoacoustic power generator (TWTAG) was proposed utilizing cold energy and low-grade waste heat simultaneously. Most importantly, a simplified structure was applied instead of the traditional structure with thermal buffer tubes (TBTs) and ambient heat exchangers (AHXs). Numerical results show that the system has superior performance together with a much more compact structure. In order to find the best location of the simplified system for acoustic power extraction, three different load-coupling modes were investigated separately. The three-stage TWTAG operating between 110 and 373 K is able to generate 11.4 kW and 10.8 kW electric power under hot-coupled and mid-coupled modes with 4 MPa helium gas as working gas, respectively. It is very enlightening that the cold-coupled mode can generate more than 15 kW acoustic power and shows the best performance. This work shows that thermoacoustic technologies have great potential in LNG cold energy and waste heat recovery. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect