Abstract
A combustor of a fuel-vaporizing type has the merits in turn down ratio, combustion load capacity and combustion controllability. The burner of the boiler, however, consumes the electric power for fuel vaporizer during combustion. The purpose of this study is to develop a power saving type-home water boiler. We manufactured a burner and a boiler in which radiant heat can reflux from flames upstream through large-porous ceramic plate enough to evaporate fuel. The plate has a role of flame stabilizer as well. As a result of experimental study on the combustion characteristics, it is found that this burner provides high turndown ratio, uniform temperature distribution and fine combustion controllability. The reflux rate of radiant heat from frames is estimated to be less than 2% of the combustion load.
