Physical properties of a LPG flame with high-temperature air on a regenerative burner

• Published in: Combustion and flame Vol. 136; no. 4; pp. 567 - 569
• Main Authors: Blasiak, W, Yang, W.H, Rafidi, N
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01-03-2004; Elsevier Science
• Subjects: air temperature; Applied sciences; combustion; cooling; Energy; Energy. Thermal use of fuels; Engineering mechanics; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; exhaust gas; fire; furnace; Furnaces. Firing chambers. Burners; Gaseous fuel burners and combustion chambers; high temperature; Mechanical and thermal engineering; Mekanisk och termisk energiteknik; priority journal; technique; TECHNOLOGY; TEKNIKVETENSKAP; Teknisk mekanik; temperature dependence; Termisk energiteknik; thermal analysis; Thermal energy engineering; LPG; Flame structure; Burner; Combustion; High temperature; Regenerative process; Physical properties
• ISSN: 0010-2180; 1556-2921; 1556-2921
• DOI: 10.1016/j.combustflame.2003.12.006

High-temperature air combustion (HiTAC) has become increasingly attractive in industrial furnaces over recent years [1-3]. The combination of HiTAC with a modern regenerative system leads to significantly increased energy efficiency and low emissions. The temperatures of the air and/or fuel are raised well above the autoignition temperature and exhaust gas recirculation is used to reduce the final flame temperature. The objective of the work presented here is to investigate the physical properties of a LPG (mass fractions: C2H6 = 0.95, C3H8 = 98.35, and C4H10 = 0.67) flame with high-temperature preheated air on a regenerative burner. A test furnace with outside dimensions of 3.5 x 2.2 x 2.2 m was equipped with a 200 kW one-flame HiTAC regenerative system [4]. Four air-cooled tubes with an external diameter of 0.11 m were installed horizontally in each corner of the furnace to remove heat from the combustion chamber. Recirculation of 80% of the flue gases through the burner outlets provided sufficient preheat and the remainder of the exhaust gases exit the furnace through two flue ducts located on the rear wall. The arrangement is shown in Fig. 1. The switching time between heating and cooling of the heat regenerators was 10 s and the fluxes of fuel and air were 7.7 and 210 N m3 /h, respectively. The operating temperature of the furnace was 1100 DGC as determined by a thermocouple located at the middle of the furnace ceiling. In the studies, the origin of the coordinate is at the central axis of the burner in Fig. 3.