"Flow variation and fuel savings when using Hydrogen- Methane mixture as combustible in wall-mounted boilers’ operation"

Abstract

The article presents a theoretical and experimental analysis that highlights how the employment of a hydrogen-methane mixture influences the variation of the fuel flow for wall-mounted boilers and also aims to evaluate whether fuel economy may be achieved. For a 28 kW condensing boiler, at 50/30 °C water outlet/inlet operating regime and for 2800 h functioning, 431 m 3 of methane gas were saved when using a 23% hydrogenmethane combustible. Correspondingly, at 80/60 °C working regime 599.3 m 3 of methane economy was achieved. The theoretical increasing of the combustible flow of 23,2% is validated by the value obtained experimentally of 22.84% respectively, when the mixture is utilized.