提高热离子能量转换效率的核心因素初析

倪文涛; 罗琦; 钟武烨; 吕征

doi:10.13832/j.jnpe.2024.04.0134

提高热离子能量转换效率的核心因素初析

doi: 10.13832/j.jnpe.2024.04.0134

倪文涛^1,,
罗琦²,
钟武烨^1, ,,
吕征¹

1.
中国原子能科学研究院，北京，102413
2.
中国核工业集团有限公司科技委，北京，100822

基金项目: 中核集团青年英才科研项目（219602）

详细信息

作者简介:
倪文涛（1997—），男，硕士研究生，现主要从事特种动力方面的研究，E-mail: 3286812532@qq.com

通讯作者:
钟武烨，E-mail: zhongwuye23@163.com

中图分类号: TL31
计量
- 文章访问数: 55
- HTML全文浏览量: 20
- PDF下载量: 12
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-28
- 修回日期: 2023-10-13
- 刊出日期: 2024-08-12

Preliminary Analysis of the Core Factors for Improving Efficiency of Thermionic Energy Conversion

Ni Wentao^1
,,
Luo Qi²,
Zhong Wuye^{1
, ,},
Lyu Zheng¹

1.
China Institute of Atomic Energy, Beijing, 102413, China
2.
Committee on Science and Technology of China National Nuclear Corporation, Beijing, 100822, China

摘要

摘要: 高效热离子能量转换技术是提升热离子燃料元件热电转换效率、推动空间热离子反应堆电源向更大功率和更长寿命迈进的核心关键技术。为探究提高热离子能量转换效率的核心因素，本文从热离子能量转换的基本原理出发，从发射极的改进、接收极的改进和电弧压降的降低三个方面综述了提升热离子燃料元件热电转换效率的方法。分析表明，大幅提升热电转换效率的明确方向是接收极的改进，关键是新一代低吸铯功函数接收极材料的研发。
- 高效热离子能量转换技术 /
- 热离子燃料元件 /
- 热电转换效率 /
- 接收极材料
Abstract: Efficient thermionic energy conversion technology is the key technology for improving the thermoelectric conversion efficiency of thermionic fuel elements and promoting the space thermionic reactor power supply towards higher power and longer lifetime. To explore the key factors that improve the efficiency of thermionic energy conversion, this article starts from the basic principle of thermionic energy conversion and summarizes the methods to improve the thermoelectric conversion efficiency of thermionic fuel elements from three aspects: improvement of the emitter, improvement of the collector, and reduction of arc voltage drop. Analysis shows that the clear direction for significantly improving thermoelectric conversion efficiency is the improvement of the collector, and the key is the development of a new generation of low absorption cesium work function collector materials.
- Efficient thermionic energy conversion technology /
- Thermionic fuel elements /
- Thermoelectric conversion efficiency /
- Collector material

HTML全文

图 1 TFE的工作原理

Figure 1. Working Principle of Thermionic Fuel Element (TFE)

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图 2 TEC电弧工况下的伏安特性曲线

Figure 2. Volt Ampere Characteristic Curve of TEC under Arc Operating Conditions

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图 3 纳米材料表面电子发射势垒示意图

Figure 3. Schematic Diagram of Electron Emission Potential Barriers on the Surface of Nanomaterials

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图 4 发射器表面开发的类型

Figure 4. Types of Emitter Surface Development

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图 5 3种组态的转换器在不同铯压下的发电性能

T_E—发射极温度；T_C—接收极温度

Figure 5. Effect of Cesium Pressure on the Power Generation Performance of the Three Converters Tested

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图 6 VKh2U接收极功函数

Figure 6. The VKh2U Collector Work Function

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图 7 不同铯蒸气温度下的伏安特性

Figure 7. Volt-ampere Characteristics at Different Cesium Vapor Temperatures

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图 8 不同电极对TEC的性能对比

Figure 8. Performance Comparison of TEC with Different Electrodes

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图 9 单个六边形刚性波纹垫片示意图

Figure 9. Schematic Diagram of Single Hexagonal Rigid Corrugated Gasket

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