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DOI	10.1039/d0ee01640c
	System efficiency and power: The bridge between the device and system of a thermoelectric power generator
	Zhu K.; Deng B.; Zhang P.; Kim H.S.; Jiang P.; Liu W.
发表日期	2020
ISSN	17545692
起始页码	3514
结束页码	3526
卷号	13 期号:10
英文摘要	The thermoelectric efficiency formula (?max), derived by Ioffe, provides a direct connection between the material dimensionless figure of merit ZT and the maximum efficiency of transformation of heat into electricity in an ideal device with fixed terminal temperatures. However, for a thermoelectric power generator (TEG) system made for practical use, it could meet diverse temperature scopes and heat transfer conditions, making the terminal temperatures floating rather than fixed. Here, we define the optimized system efficiency and power output based on an analytical model that provides a connection between the device and the system by considering constant material properties and varying thermal circumstances. It is found that the dimensionless cold side thermal resistance fc has a larger inhibiting effect on the system performance than its hot side counterpart fh, suggesting more thermal management efforts should be placed on the cold side. Furthermore, a general system level design strategy is proposed to obtain the engineering leg length and the aspect ratio by considering the condition of external thermal resistance, output power and voltage match. As an example, a predicted 2-3 times enhancement was experimentally confirmed in a room temperature TEG device. © The Royal Society of Chemistry.
英文关键词	Aspect ratio; Efficiency; Heat transfer; Thermal Engineering; Thermoelectric equipment; Thermoelectric power; Thermoelectric power plants; Dimensionless figure of merit; Fixed terminals; Heat transfer conditions; Inhibiting effect; Maximum Efficiency; Optimized system; System efficiency; Thermoelectric efficiency; Thermoelectric energy conversion
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189525
作者单位	Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen Guangdong, 518055, China; Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices, Southern University of Science and Technology, Shenzhen Guangdong, 518055, China; Department of Mechanical Engineering, University of South Alabama, Mobile, AL 36688, United States; State Key Laboratory of Catalysis, Cas Center for Excellence in Nanoscience, Dalian Institute of Chemical Physics, Dalian Liaoning, 116023, China
推荐引用方式 GB/T 7714	Zhu K.,Deng B.,Zhang P.,et al. System efficiency and power: The bridge between the device and system of a thermoelectric power generator[J],2020,13(10).
APA	Zhu K.,Deng B.,Zhang P.,Kim H.S.,Jiang P.,&Liu W..(2020).System efficiency and power: The bridge between the device and system of a thermoelectric power generator.Energy & Environmental Science,13(10).
MLA	Zhu K.,et al."System efficiency and power: The bridge between the device and system of a thermoelectric power generator".Energy & Environmental Science 13.10(2020).