具有较小外部不可逆性的热电器件的最佳性能
Rajeshree Chakraborty1, Ramandeep S Johal1
1Indian Institute of Science Education and Research Mohali, Department of Physical Sciences, Sector 81, S.A.S. Nagar, Manauli PO 140306, Punjab, India.
Physical review. E
|October 21, 2025
概括
这项研究将内部和外部不可逆向性整合到热电装置分析中,在最大功率 (EMP) 表达下产生新的效率. 这些发现为了解热电发电机和冰箱性能提供了一个统一的框架.
科学领域:
- 热力学是一种热力学.
- 材料科学 材料科学 材料科学
- 能源转换 能源转换
背景情况:
- 热电设备的传统热力学分析往往简化了不可逆性,专注于内部或外部因素.
- 现有的最大功率效率 (EMP) 模型,如内向可逆和外向可逆,通过只解决特定不可逆性的问题,提供了有限的范围.
研究的目的:
- 开发一个统一的热力学模型,同时结合热电器件的内部和外部不可逆性.
- 在对称和小的外部不可逆性近似下,为最大功率 (EMP) 的效率推导出可处理的表达式.
- 探索这种统一模型对热电发电机和冰箱的影响,包括与现有理论和模型进行比较.
主要方法:
- 在常量属性框架内开发了一个热力学模型来分析热电设备.
- 集成的同时内部和外部不可逆性,采用对称和小外部不可逆性的近似值.
- 从关键参数 (热导电比率,材料价值数字和温度比率) 导出了最大功率 (EMP) 的效率的分析表达式.
- 将衍生的EMP与精确模型和其他有限时间热力学不可逆转模型进行比较.
- 将分析扩展到热电冰箱,以研究最大冷却功率的效率.
主要成果:
- 获得了最大功率效率 (EMP) 的可处理表达式,该表达式考虑了内部和外部不可逆性.
- 证明了在可逆近似的热电发生器 (TEG) 可以在高温状态下映射到费曼杆模型中.
- 提供了一个关于热电器件和介视模型之间的关系的替代视角.
- 在类似的假设下,分析了热电冰箱在最大冷却功率的效率.
结论:
- 开发的模型通过整合多种不可逆性的方法,提供了对热电器件性能更全面的了解.
- 这些发现为分析热电发电机和冰箱提供了一个统一的框架.
- 这项研究为宏观热电现象与微观模型 (如费曼子) 之间的联系提供了新的见解.
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