Research On Fuel-Air Hybrid Heat Storage Device

For a long time,"protecting the environment and saving energy" has always been one of the important research objectives of the development of power machinery.People are constantly looking for zero-emission clean energy.The compressed air engine takes the air as the working medium,is the real zero emission clean energy.its medium energy is directly converted from electric energy.This energy conversion does not need to rely on the battery which will cause secondary pollution.However,in the present research,the energy density of the compressed air engine is low.Therefore,the current research focuses on the research of fuel-air hybrid power.In the study of fuel-air hybrid power,researchers generally believe that energy recovery is the best choice to improve the energy density of compressed air,which is low in cost and can improve the efficiency of energy utilization.The highest voice of energy recovery technology is the utilization of internal combustion engine waste heat.The fuel-air hybrid storage device is a realization device for waste heat utilization.It uses the exhaust gas of the high temperature internal combustion engine to store energy and releases the energy to the low temperature compressed air,thus improving the energy density of the compressed air and increasing the working hours of the compressed air engine at the rated power.In this study,the design structure of the fuel-air hybrid heat storage device is put forward,and the optimized design program corresponding to the structure is designed by using the Matlab.The numerical calculation method and model used in the program can be used to demonstrate the type selection and demonstration of the heat storage device.It provides a new research method for the use of fuel-air hybrid reheat.The main contents of the research work for fuel-air hybrid heat storage are as follows:(1)First of all,the preliminary design of the fuel-air hybrid heat storage device is carried out.The basic working principle of the fuel-air hybrid heat storage device is expounded,and a reasonable structure design of the heat exchanger is put forward according to its working principle,the working environment and the working process of the compressed air engine.(2)Secondly,the numerical calculation program of compressed air engine is designed and displayed by Matlab.In the program,the working process of the compressed air engine is simulated through a reasonable hypothesis,and the factors affecting the endurance of the compressed air engine are analyzed.On the one hand,it verifies the necessity of adding the heat exchanger to the fuel-air hybrid engine.On the other hand,the result of the program's calculation output is the necessary data for the numerical calculation of the heat storage and heat release process of the heat storage device.(3)On the basis of the numerical calculation and analysis of the compressed air engine,the Matlab is used to design and display the numerical calculation program of the fuel-air hybrid heat storage device.Through the reasonable hypothesis and the establishment of the model,the process of the fuel-air hybrid heat storage and heat release is simulated by the program.Through this program,the optimization of the design scheme of the heat storage device proposed in this study is realized,and the design parameters of the heat storage device in the optimization scheme and the improvement and improvement of the performance of the compressed air engine are presented.(4)Finally,by analyzing the results of this study,some objective and reasonable suggestions for the design of fuel-air hybrid heat storage are put forward.At the same time,the limitations of some research contents and methods from the design of the heat storage device to the numerical program are analyzed and summarized,and some further directions for this study are put forward.