A CFD Study of Thermodynamics and Efficiency Metrics in a Hydrogen-Fueled Micro Planar Combustor Housing Dual Heat-Recirculating Cylindrical Combustors for MTPV Applications DOI Open Access

Faisal Almutairi

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1142 - 1142

Published: April 10, 2025

The micro combustor is the energy source of micro-thermophotovoltaic systems; thus, optimizing its design one key parameters that lead to an increase in output energy. Therefore, enhance system’s overall efficiency, this numerical work introduces a new configuration for parallel-flow (PF) and counter-flow (CF) hydrogen-fueled cylindrical combustors integrated into planar combustor. To overcome short residence time applications causing high heat dissipation, house heat-recirculating channels allow more transfer external walls. In pursuit target, simulations are carried out analyze thermodynamic system efficiency parameters. addition, different initial operating conditions varied optimize system, including inlet velocity equivalence ratio. results reveal PF CF structures result significantly higher wall temperatures uniform temperature variations than conventional (CD). Despite entropy generations, exhaust gas 591 K 580 lower CD, respectively, both 14% increases radiation efficiency. Increasing improves thermal designs; however, experiences drastic reduction. power density highlights unity ratio as optimal. designs yield roughly identical findings, but exhibits most cases due equal from opposite sides.

Language: Английский

Experimental Investigation of Flame Characteristics of H2-Enriched Biogas Under Different Swirl Numbers DOI Creative Commons
Gulzira Koldassova, K.S. Idrissova,

A.A. Tumanova

et al.

Energies, Journal Year: 2025, Volume and Issue: 18(6), P. 1446 - 1446

Published: March 15, 2025

Biogas, derived from human waste or industrial byproducts, is considered one of the most environmentally acceptable fuels. However, such fuels often exhibit relatively low efficiency, making it essential to develop technologies that facilitate their effective combustion. This article investigates combustion biogas with addition hydrogen at varying degrees flow swirling. For this purpose, a burner was used in which methane, and CO2 were mixed mixer. The studies revealed increasing proportion leads an average 15% rise NOx concentration. Additionally, increase degree swirling has positive effect on generation. On other hand, higher reduces concentration CO exhaust gases. presence ballast gases, as CO2, generally results levels when combined high number. analysis products for indicates 14% proportion. highest concentrations observed content. In terms reducing CO, SW = 1.3 successful. angle

Language: Английский

Citations

0
A CFD Study of Thermodynamics and Efficiency Metrics in a Hydrogen-Fueled Micro Planar Combustor Housing Dual Heat-Recirculating Cylindrical Combustors for MTPV Applications DOI Open Access

Faisal Almutairi

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1142 - 1142

Published: April 10, 2025

The micro combustor is the energy source of micro-thermophotovoltaic systems; thus, optimizing its design one key parameters that lead to an increase in output energy. Therefore, enhance system’s overall efficiency, this numerical work introduces a new configuration for parallel-flow (PF) and counter-flow (CF) hydrogen-fueled cylindrical combustors integrated into planar combustor. To overcome short residence time applications causing high heat dissipation, house heat-recirculating channels allow more transfer external walls. In pursuit target, simulations are carried out analyze thermodynamic system efficiency parameters. addition, different initial operating conditions varied optimize system, including inlet velocity equivalence ratio. results reveal PF CF structures result significantly higher wall temperatures uniform temperature variations than conventional (CD). Despite entropy generations, exhaust gas 591 K 580 lower CD, respectively, both 14% increases radiation efficiency. Increasing improves thermal designs; however, experiences drastic reduction. power density highlights unity ratio as optimal. designs yield roughly identical findings, but exhibits most cases due equal from opposite sides.

Language: Английский

Citations

0