Numerical Analyses of Entropy Production and Thermodynamics Exergy on a Hydrogen-Fueled Micro Combustor Featuring a Diamond-Shaped Bifurcated Inner-Tube Structure for Thermophotovoltaic Applications
Faisal Almutairi
TL;DR
This paper introduces a new hydrogen-fueled micro combustor design that improves energy conversion and heat transfer for thermophotovoltaic applications.
Contribution
A diamond-shaped bifurcated inner-tube structure is proposed and analyzed for enhanced thermodynamic performance in micro combustors.
Findings
The new design reduces mean exhaust gas temperature by 585.98 K compared to conventional designs.
Exergy and radiation efficiencies are improved by 7.78% and 14.08%, respectively.
Elongating the diamond structure and widening flame channels enhance thermal dynamics and heat absorption.
Abstract
To improve the heat transfer mechanisms from the thermal energy to the walls, the current work presents a new structure for a micro combustor fueled by hydrogen featuring a diamond-shaped bifurcated inner-tube configuration. For this purpose, a series of three-dimensional (3D) numerical analyses are conducted to investigate the effects of the length of the diamond-shaped structure, width of inner flame channels, inlet equivalence ratio, and hydrogen volume flow rate on the key performance and thermodynamic parameters. In comparison to the conventional design, the outcomes reveal that the proposed configuration exhibits remarkable improvements in energy conversion efficiency, as it reduces the mean exhaust gas temperature by 585.98 K and boosts the exergy and radiation efficiencies by 7.78% and 14.08%, respectively. The parametric study of the design parameters indicates that elongating…
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Taxonomy
TopicsCombustion and flame dynamics · Advanced Combustion Engine Technologies · Thermal Radiation and Cooling Technologies