A miniaturized power generation system cascade utilizing thermal energy of a micro-combustor: Design and modelling

被引：31

作者：

Meng, Long ^{[1
,2
]}

Li, Jun ^{[1
,2
]}

Li, Qingqing ^{[1
,2
]}

机构：

[1] Tianjin Univ, Minist Educ, Key Lab Efficient Utilizat Low & Medium Grade Ene, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Sch Mech Engn, Dept Energy & Power Engn, Tianjin 300072, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 27期

基金：

中国国家自然科学基金;

关键词：

Micro thermophotovoltaic (TPV); Micro thermoelectric generator (TEG); Micro-combustor; Power generation; Cascade utilization; Mathematical modelling; THERMOELECTRIC GENERATOR; TPV;

D O I：

10.1016/j.ijhydene.2017.05.147

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Currently, combustion-based micro power devices encounter the problem of low conversion efficiency. A miniaturized power generation system cascade utilizing thermal energy of a micro-combustor is proposed, because thermophotovoltaic (TPV) cells and thermoelectric (TE) modules work at different temperature levels. The system consists of a planar micro-combustor with a bended extension at the exit, two GaSb TPV modules to convert high temperature thermal radiation and two Bi-Te based TE modules attached to the bended extension to harness medium temperature thermal energy. The mathematical modelling approach to quantify the power output and conversion efficiency is systematically presented. The modelling results show that the integration of the TE modules could significantly improve the system efficiency. When burning the H-2/air mixture, the overall system efficiency could reach 2.5% under the flow condition of U-0 = 3 m/s and Phi = 1.0. Finally, measures for better thermal management to further enhance the conversion efficiency are discussed. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：17275 / 17283

页数：9

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