Study On Design And Optimization Of Atmospheric/ Infrared Coupled Burner For Stoves

Household gas stoves are mainly divided into two categories according to the combustion system and mode: atmospheric gas stoves and infrared gas stoves.Among them,the atmospheric gas stove has higher heat load than the infrared gas stove,and the load ratio is easy to adjust,which satisfies the cooking habits of the Chinese people and occupies a major market share;but the infrared gas stove has higher thermal efficiency,lower pollutant emissions,and meets the increasingly stringent energy conservation and environmental protection requirements.Therefore,it is urgent to develop a new type of gas stove that meets both the cooking habits of the Chinese people and the requirements of energy conservation and environmental protection.In order to design a new type of burner for the stove that can combine the advantages of the atmospheric burner and the infrared burner,this study first based on the response surface method,through the combination of experiment and numerical simulation,to optimize the structural parameters of an atmospheric burner,and to determine the key influencing factors.The results show that the height of the pot holder and the height of the inner burner have a synergistic effect on the thermal efficiency and CO emissions of the atmospheric gas stove.There is an optimum range of pot holder height and inner burner height.After analyzing the response surface,the height of the optimal pot holder of the burner is 7.5mm higher than that of the prototype,the height of the inner burner is increased by 6mm,the thermal efficiency can be increased by about 2%,and the CO emission is in line with the national standards.Furthermore,this study conducted an in-depth study on an atmospheric burner with a semi-confined structure.The results show that the semi-confined structure can not only reduce the heat loss,but also enhance the radiation heat transfer,so it is of great benefit to improve the thermal efficiency of the burner.In order to further clarify the radiation heat transfer characteristics of the structure,the effects of radiant surface emissivity(passive radiation heat transfer)and temperature(active radiation heat transfer)parameters on the radiation heat transfer of the burner were studied based on the numerical simulation method.Comparative analysis shows that increasing the radiant surface temperature can significantly increase the proportion of radiant heat transfer,so the semi-confined structure and porous media radiation are combined to realize active radiation heat transfer,which will be of great benefit to improve the thermal efficiency of the gas stove.Finally,based on the above research results,a new atmospheric/infrared coupled burner was designed,and based on the response surface method,the effects of pot holder height and inner burner height on the thermal efficiency and CO emissions of the coupled burner were studied.The structural parameters were optimized,and finally a new design of the stove burner was obtained in which the thermal efficiency was improved by about 6% and CO emission was in line with the national standards.