Abstract
Hydrogen production through steam generated from low-grade fuel recovery is considered a prospective method. To maximize the energy recovery, the influence of the heat exchanger position on the heat extraction stability of lean methane-air premixtures combustion in a porous burner has been numerically explored. The extracted position coefficient (EPC) is defined and a heat extraction model is validated through the experimental findings. It is shown that extracted position has a significant influence on the temperature profile, heat transfer capacity, heat loss as well as heat recovery rate. When the EPC is lower than 0.18, the filtration burner shows worse stability with great heat loss, the heat transfer behavior of the heat exchange tubes is severely weakened and heat recovery efficiency is merely about 13%. The optimal heat recovery position is recommended in the EPC range of 0.36–0.55, which has shown excellent heat extraction performance and accelerated the process of acquiring a quasi-steady state. Within this EPC range, the fluctuation of outlet temperature difference can be stabilized within 0.2 K, which maximizes the heat flux of heat exchangers, and heat recovery efficiency of about 70%–89% recovered with a concentration of 0.4%–0.8%.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
