Comprehensive numerical insight the thermal performance improvement of the micro combustors with internal bionic Y-shaped fins for micro-thermal voltaic system applications. (15th June 2022)

• Record Type: Journal Article
• Authors: Xue, Zongguo; Yan, Yunfei; He, Ziqiang; Shen, Kaiming; Zhang, Chenghua
• Is Part Of: Fuel. Volume 318(2022)
• Publication Date: 2022-06-15
• Subjects: Micro combustors -- Bionic -- Y-shaped fractal network; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.123610
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Organic combination of bionic Y-shaped fractal network and thermoelectric system. An innovative micro combustor with internal embedding Y-shaped fins is introduced. Micro combustor with internal Y-shaped fins exhibits excellent thermal performance. Outer wall temperature of the novel micro combustor increases by 40 K ∼ 80 K. Exergy efficiency of the novel micro combustor increases by 20% ∼23%. Abstract: Targeting to enhance the comprehensive thermal performance of the micro-combustion chamber for the micro-thermal voltaic system (MTPV), an innovative micro-combustion chamber with embedding Y-shaped fins is introduced. Comparing and investigating the outer wall temperature, exergy efficiency, energy output and the uniformity of the traditional micro-combustion chamber and the novel micro-combustion chamber with internal Y-shaped fins. The results show that the micro-combustion chamber with internal Y-shaped fins exhibits excellent thermal performance. It is worth noting that when the number of Y-shaped fins is 4, 6, and 8, the highest outer wall temperature is 1284 K, 1293 K and 1310 K, respectively, while the traditional micro combustor burner outer wall temperature is 1227 K. In addition, the exergy efficiency of micro-combustion chamber with internal Y-shaped fins is 38.1%, 42.1% and 43.2% respectively when the number of Y-shaped fins is 4, 6, and 8, while the traditional micro-combustion chamber is 19.8%, Furthermore, an increase in the number of fins will result in an increase in pressure drop and a decrease in temperature uniformity. Therefore, while considering the thermal performance, the number of fins should be selected reasonably.