Optimization Design And Analysis Of Embedded Gas Stove Based On Structural Parameters And Hydrodynamic Parameters

In recent years,with the continuous expansion of the market size of stoves,embedded stoves occupy a large share of the domestic gas market with its beautiful and easy-to-clean features.However,compared with the traditional tabletop gas stove,the embedded gas stove still have structural design and performance deficiencies:Due to structural limitations,the secondary air supply of the embedded stove is not sufficient,and the CO concentration in the flue gas tends to exceed the standard;The air replenishment is ensured by increasing the pot stand height,which also results in a reduction of its thermal efficiency.Therefore,under the current environmental background that embedded gas stoves occupy the mainstream of domestic gas stove market,it is particularly important to research and explore ways to increase the thermal efficiency of embedded gas stoves and to improve their smoke emissions.In the near term,it has high practical value for improving the safety and efficiency of household cookers;Far,it is of practical significance to the improvement of the energy efficiency of the entire society.This thesis takes three samples of embedded gas stoves as the research object.Firstly,we deeply understand the actual structural parameters and hydrodynamic parameters of the three sample embedded gas stoves,compare the differences among the three gas stoves,and compare and analyze the differences between the actual and theoretical values through the theoretical calculation of the optimal burner parameters.In addition,use the factors of differences as variables to complete the preliminary design of the experimental content.Then through the preliminary thermal efficiency test,temperature test and the smoke analysis,combined with experimental data and the previous part of the theoretical calculation,researching and analysis the differences in the structural parameters and hydrodynamic parameters of the three sample embedded gas stoves,which are the main reasons for the differences in energy efficiency and smoke emissions,and get the methods and ideas for improving the thermal performance and smoke emission of the same type of embedded gas stoves.Then,in-depth experiments were conducted on high-efficiency sample gas stoves to further study and explore the effective way to improve the thermal efficiency and smoke emission by changing some influencing factors,such as primary air coefficient,thermal intensity of fire hole,structure of energetic rings,and pot support height.According to the above theoretical calculations and experimental studies,it is possible to know about the structural parameters:The actual structural parameters of the three sample stoves appliances are non-optimal structural parameters,which can be approached to the optimal structural parameters by changing the ejector structure and fire hole area.Burner head outer diameter is also an important structural influence factor.In addition,the addition of a condensing ring structure can reduce the O₂ content in the flue gas by about 2%,and the heat efficiency of the stove can be increased by about 4%,which has a significant improvement in the performance of the burner.The change of the structural parameters will inevitably cause changes in the hydrodynamic parameters,in which the excess air coefficient has a greater influence on the thermal efficiency of the burner.According to theoretical calculation and experimental data verification,when the heat transfer effect at the bottom of the boiler is approximately the same,the excess air coefficient a increases by one,and the theoretical value of the measured thermal efficiency is approximately 6.5%.In addition,as the thermal intensity of the fire hole increases,the measured thermal efficiency gradually increases,and the CO concentration in the flue gas gradually increases.The theoretical calculation results and experimental laws obtained from the structural parameters and hydrodynamic parameters above can be used as the entry point for the optimization of this type of embedded cook Ware,and also provide reference for the related research of embedded cook Ware in the future.