Effects of H₂/CO blend ratio on radiated power of micro combustor/emitter

This study presents the effects of adding CO to H₂ as a blend fuel on the radiated power and efficiency of a micro cylindrical emitter. The effects of emitter length and emitter wall thickness on the radiation energy and emitter efficiency are also examined numerically. The results show that the region with high radiated power appears far away from the emitter inlet with the increase of CO addition. Generally, the emitter efficiency decreases with the increase of CO addition. In the case of 2 m/s flow velocity, the emitter efficiency decreases slightly when the CO mass fraction increases from 5% to 10%. The emitter efficiency decreases with the increase of H₂/CO/air mixture mass flow rate. In addition, the highest emitter efficiency is obtained when the tube length is 20 mm and wall thickness is 0.4 mm. The H₂/CO could be a promising blend fuel for micro-thermophotovoltaic (TPV) system application. - Highlights: • Davis's H₂/CO reaction mechanism is validated in micro combustion process. • The effects of H₂/CO blend ratio are studied. • The effects of fuel/air mass flow rate are presented