Effects of the preheat layer thickness on surface/submerged flame during porous media combustion of micro burner. (1st March 2017)

• Record Type: Journal Article
• Authors: Janvekar, Ayub Ahmed; Miskam, M.A.; Abas, Aizat; Ahmad, Zainal Arifin; Juntakan, T.; Abdullah, M.Z.
• Is Part Of: Energy. Volume 122(2017)
• Page Start: 103
• Page End: 110
• Publication Date: 2017-03-01
• Subjects: Porous media combustion -- Micro burner -- Equivalence ratio -- Thermal efficiency -- Submerged flame region -- NOX and CO emission; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2017.01.056
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: The applications of porous media burners are of massive interest to researchers from decades, and still trending in the modern world because of their tremendous advantages, such as high thermal efficiency and low emissions. In this work, a microburner was made to achieve surface and submerged flame region for different thicknesses of preheat layers. A reaction layer of alumina foam with a predefined thickness was used, whereas the preheat layer of porcelain foam was replaced with three different thicknesses namely 5, 10, and 15 mm. By using 5 mm preheat layer, only surface flame was visible with absolutely no trace of submerged flame region, while 10 and 15 mm can undergo both surface and submerged flame region. Equivalence ratio of 0.7 was observed to give best performance with regards to surface flame, while 0.5 for submerged flame region. Only 10 mm can able to give highest thermal efficiencies reaching 90% and 38% for the surface and submerged flame region respectively. Finally, low emission rate for NO x and CO was seen for all the possible individual cases. Highlights: A study to show the cut out line between surface and submerged flame region in a burner. Studying the effect of preheat layer thickness on surface and submerge mode. Reaction layer with foam porous media can also undergo submerge flame. Effects of ultra-lean equivalence ratios on micro burner.