不同工作气体的双作用热声发电机的热力性能研究

摘要

Numerical simulation of a three-cylinder thermoacoustic double-acting electric generator was carried out. The influence of different working gas on performance of the thermoacoustic generator was analyzed, including gas nitrogen, gas carbon dioxide, gas argon, helium-argon mixture gas and gas hydrogen. The results show that the thermal performance of the system is greatly related to the working gas, the obtained electric power reached highest with hydrogen as working gas, the obtained maximum total electric power was 5 145 W and the thermoelectric efficiency was 22. 8% .%对一台三缸的双作用热声发电机进行了数值模拟,考察了不同工作介质下系统的热力性能.考察的气体工作介质包括氮气、二氧化碳、氩气、不同组分的氦氩混合气以及氢气.模拟计算表明,系统的热力性能与工质密切相关.采用氢气作为工作介质时,该热声发电机获得的电功最大,三个电机获得总电功最大可达5145 W,此时系统的热电效率为22.8％.