Effects of porosity and multilayers of porous medium on the hydrogen-fueled combustion and micro-thermophotovoltaic

Qingguo Peng, Bo Xie, Wenming Yang, Shihao Tang, Zhenwei Li, Peng Zhou and Ningkang Luo

Renewable Energy, 2021, vol. 174, issue C, 391-402

Abstract: The premixed H2/air combustion with varied porosity of porous medium (PM) is experimentally and numerically studied. The influences of porosity and arrangement of PM as well as the effects of multi-PM-layers on combustion characteristics and energy conversion are comprehensively investigated. The results indicate that a small porosity of porous medium is beneficial to improve flame stability and heat transfer, while it is adverse to the component flow and flame propagation. For the combustor inserted with multi-PM-layers, the larger-small porosities setting balances their opposing effects on the fluidity and the thermal performance, resulting in higher combustion efficiency and radiation temperature. With the increase of flow rate, effects of PM layout and porosity on combustion and heat transfer are remarkably enhanced. Furthermore, the radiation power of the micro thermophotovoltaic (TPV) system is significantly improved with the increase of radiation temperature. It is found that the combustor inserted with three PM layers (porosity p = 0.95 + 0.9+0.85) achieves a high electrical power output and system efficiency, which is more appropriate for the application of micro TPV or micro power generator. It contributes to chemical energy release and heat transmission for further utilization.

Keywords: Micro-thermophotovoltaic system; Porous medium combustion; Porosity; Multi-porous-medium-layers; Efficiency (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (16)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148121006285
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:174:y:2021:i:c:p:391-402

DOI: 10.1016/j.renene.2021.04.108

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().