Experimental study on premixed combustion in two-layer porous media with embedded heat exchangers

被引：0
|
作者：
Duan Y. [1 ]
Cheng L.-M. [1 ]
Wu X.-S. [1 ]
Qiu K.-Z. [1 ]
Luo Z.-Y. [1 ]
机构：
[1] College of Energy Engineering, Zhejiang University, Hangzhou
来源：
Cheng, Le-Ming (lemingc@zju.edu.cn) | 1626年 / Zhejiang University卷 / 51期
关键词：
Embedded heat exchangers; Heat transfer; Porous media; Premixed combustion;
D O I：
10.3785/j.issn.1008-973X.2017.08.019
中图分类号：
学科分类号：
摘要：
CH4/air premixed combustion in SiC porous media with embedded heat exchangers were experimentally investigated in order to analyze the combustion and heat transfer behaviors in porous media with embedded heat exchangers. Temperature distribution, stability limits and pollutant emissions at varied equivalence ratios and cooling water flow rates were presented. Thermal efficiency of burner and the heat transfer between heat exchangers and the porous media were analyzed. The temperature level was lowered within heat exchangers embedded, and the flame can stabilize in a relatively wide range of the inlet velocity. The nitrogen oxide (NOx) emission of the burner with heat exchangers embedded was less than that of porous burner without heat exchangers, which was lower than 35 mg/m3 under all experiment conditions. The thermal efficiency of the burner decreaseds with the inlet air flow rate and was kept in the range of 60%~80%. The average heat transfer coefficient between the porous media and the heat exchangers increaseds 75% compared with the conventional convection of flow across the tube banks. © 2017, Zhejiang University Press. All right reserved.
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页码：1626 / 1632
页数：6
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