CSIR-IIP

A domestic cooking burner is designed for the efficient and safe application of Piped Natural Gas (PNG). The burner comprises of a gas injector with diameter suitable for injecting PNG at a range of flow rate at subsonic conditions. The injector is in alignment with mixing tube; throat has been designed for minimum 50% primary aeration to allow entrainment of primary air thus leading to air fuel mixing. The mixing tube is made divergent and smooth enough to prevent frictional pressure losses. The burner is conventionally arranged so that the head portion extends upwards towards the loading utensil with the mixing tube portion formed at 90° to the head portion so that the axis of inlet is perpendicular to the vertical axis of the burner. The top portion of the burner head has holes (flame ports) to support flames. There are three circular rows of holes with similar diameter designed to deliver a range of heat output; all the holes are drilled on the tapered faces of burner head so as to spread the flame in a larger circular area. The burner head and gas manifold have circular body with central hole to support secondary air entrainment. The loading height has been optimized for improved heat transfer from flames to cooking vessel that ensures minimum 65% of thermal efficiency. The invented PNG burner may also be used for commercial cooking and industrial heating applications. The product technology has been successfully commercialized and non-exclusive license has been given to 39 manufacturing companies.