通过强化热端吸热优化环状热电发电器件性能
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引用本文:王俊丽,周亚杰,谢华清,王元元,李奕怀,毛健辉.通过强化热端吸热优化环状热电发电器件性能[J].上海第二工业大学(中文版),2021,(2):131-137
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作者单位
王俊丽 上海第二工业大学 a. 环境与材料工程学院
 
周亚杰 上海第二工业大学 a. 环境与材料工程学院
 
谢华清 上海第二工业大学 a. 环境与材料工程学院
 
王元元 上海第二工业大学 a. 环境与材料工程学院
b. 资源循环科学与工程研究中心, 上海 201209 
李奕怀 上海第二工业大学 a. 环境与材料工程学院
 
毛健辉 上海第二工业大学 a. 环境与材料工程学院
 
基金项目:国家自然科学基金 (51876111), 上海第二工业大学研究生项目基金 (EGD19YJ0056) 资助
中文摘要:热电发电器可以将热能直接转换为电能, 被广泛应用于余热利用领域。针对环状热源, 环状热电发电系统 (ATE) 具有更好的兼容性。然而, 目前 ATE 输出功率和转换效率仍然比较低。影响其性能的主要原因之一是热端吸 热较差。针对环状热电发电热端结构进行了优化设计, 利用翅片强化热端吸热。运用标准的 κ-ε 方程和 NK 传热模 型描述流体传热、耦合热电方程描述热电发电器件性质; 利用 ANSYS 软件基于有限元法求解耦合的流体 -ATE 系 统的性能。研究了有翅片和无翅片 ATE 热电输出功率和转换效率随入口处流体温度和流速变化的性质。结果表明, ATE 在有翅片的情况下转换效率和输出功率均高于无翅片系统。特别在流速 9 m/s 和温度 600 K 条件下, 有翅片 ATE 的输出功率和转换效率分别比无翅片系统高 299% 和 6.02%。提出可行的提高 ATE 性能的方法, 有益于热电发 电器件在余热利用领域更广泛的应用。
中文关键词:环状热电发电器件  翅片  转换效率  输出功率  余热利用
 
Optimized Performance of Annular Thermoelectric Generator by Enhancing Heat Absorption
Abstract:Thermoelectric generator can directly convert heat energy into electric energy, which is widely used in the field of waste heat utilization. For the circular heat source, the annular thermoelectric generator (ATE) has better compatibility. However, the output power and conversion efficiency of ATE are still relatively low nowadays. One of the main factors affecting its performance is the poor heat absorption at the hot end. Fins are designed to enhance the heat absorption at the hot end by optimizing the structure of ATE. Heat transfer properties of the fluid are described by the standard κ-ε equations and NK heat transfer model, while the properties of thermoelectric devices are studied by the coupled thermal-electric equations. Finite-element method via ANSYS software is applied to numerically study the performance of the fluid-ATE system. The influence of the inlet temperature and velocity on the output power and conversion efficiency of ATE with and without fins are studied. The results show that the conversion efficiency and output power of ATE with fins are higher than those of ATE without fins. Specially, when the inlet velocity is 9 m/s and inlet temperature is 600 K, the output power and conversion efficiency of ATE with fins are 299% and 6.02% higher of magnitude than those of ATE without fins, respectively. A feasible method to enhance the performance of ATE is given, which is beneficial for the widely application of thermoelectric generators in energy harvesting.
keywords:annular thermoelectric generator  fins  conversion efficiency  output power  energy harvesting
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