不同热电元件连接方式的热电发电机模块可靠性比较

P. Gorskyi
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引用次数: 0

摘要

利用故障时间分布的非单调扩散规律,对热电发电机组件的可靠性指标进行了比较。利用这一规律,首次提出了单个热电元件失效时间分布的解析表达式,与传统的失效强度不变的简单指数规律有本质区别。利用该定律计算了热电偶串并联和并联串联的热电发电模块的平均无故障时间(MTBF)、95%资源和等效故障率。考虑了串并电路中不同行元数和不同行数的方案,以及串并电路中不同组元数和组元数的方案。对于所考虑的热电偶方案,确定了热电偶纯串联连接的平均失效时间的增加系数、95%资源和等效失效强度的减少系数。可以确定,这些指标可以提高三个数量级以上。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of reliability of thermoelectric generator modules with different schemes for connecting thermoelements
The study compares reliability indicators of thermoelectric generator modules using the nonmonotonic-diffusion law of failure time distribution. The authors use the law to propose for the first time an analytical expression of the failure time distribution of an individual thermoelement, which fundamentally differs from the traditional simple exponential law with a constant failure intensity. The law is used to calculate the mean time between failures (MTBF), the 95% resource and equivalent failure rate of thermoelectric generator modules with series-parallel and parallel-series connection of thermocouples. Considered are the variants of schemes with different number of elements in rows and different number of rows for serial-parallel circuit and with different number of sequential groups and elements in a group for parallel-serial circuit. Coefficients of increase of the average failure time, 95% resource and coefficients of decrease of the equivalent failure intensity for a purely series connection of thermocouples are determined for the considered thermocouple schemes. It is established that these indicators can be improved by more than three orders of magnitude.
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