Experimental study of a domestic boiler using hydrogen methane blend and fuel-rich staged combustion

Storing excess wind and solar energy in the form of hydrogen injected into the natural gas grid is one of the main ingredients of the energy transition. This hydrogen injection has an impact on emissions and the performance of user equipment. The present work reports on an experimental study of the combustion of methane-hydrogen mixture with fuel rich transverse staggered injection. The 15 kW domestic boiler used was equipped with 16 burners (2 x 8). The aim of this work is to better understand the simultaneous effects of fuel rich staged combustion (empty set = 2.0 divided by 4.0), hydrogen blending of methane (0 divided by 45%) on pollutant emissions and efficiency while maintaining a compromise between high power, fuel economy and low emissions. The results show that NOx, CO2 emissions decrease, CO and CxHy emission values increase and thermal efficiency values decrease with increasing hydrogen percentage and fuel rich staggering combustion. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

This study investigates the impact of hydrogen injection into the natural gas grid on combustion performance. Experimental results show that increasing hydrogen percentage and fuel rich staggering combustion lead to a decrease in NOx and CO2 emissions, an increase in CO and CxHy emissions, and a decrease in thermal efficiency values.