Study on Micro-Flame Array Burner for a Gas Cooking Stove Adapted to Finned Heating Surface

Abstract

Micro diffusion flame array burner is applied to gas cooking stove, in order to obtain high thermal efficiency for a finned heating bottom surface of a pot. The burner consists of co-axial double pipe micro burners. Fuel flow of propane, issued through the inner pipe, is encircled by outer air flow. Two types of burner, stainless steel outer pipe type(SUS) and copper outer pipe type(Cu), are employed to verify the effect of themal recirculation on a themal efficiency. Several types of flame are observed by combination of fule flow rate, air flow rate and the distance between buner tip and heating bottom plate; blue stable flame, luminous stable flame, open tip flame, lifting flame, and so on. Excelent themal efficiency is given in case of stainless-steel outer pipe burner, because of low heat loss by low themal conductivity of stainless-steel outer pipe and heat recovery by aluminum fins.