Development Of Performance Prediction And Analysis Software For Carbon Fiber Reinforced Carbon Steel Laminates

Energy is.an important material foundation for the development of human society.In recent years,with the continuous and rapid development of the national economy,the demand for energy continues to expand,and the problems of energy shortage and ecological environment have become increasingly prominent.As one of the important energy conversion equipment in the industry,boilers often account for more than 70%of the heat loss from exhaust smoke.In order to improve energy utilization and reduce heat loss,waste heat recovery technology came into being.However,problems such as low-temperature corrosion of heat exchange equipment have not been resolved.When the wall temperature of the heated surface is lower than the acid dew point of the flue gas,sulfuric acid vapor will condense on the heated surface,resulting in strong corrosion of the metal.According to a recent report released by MarketsandMarkets,the global waste heat recovery market is expected to reach US $ 65.87 billion by 2021,and traditional heat exchange equipment is affected by factors such as metal corrosion,poor equipment materials,and irregular operation.90%of the equipment damage is caused by corrosion,and the annual additional expenses in the country-are nearly 10 billion yuan.Therefore,the development of a new type of high thermal conductivity and corrosion-resistant heat exchange materials has become the key to solving the above problems,and is of great significance to the sustainable development of society and the protection of the environment.First,analyze the basic principles and influencing factors of low temperature dew point corrosion.According to the material requirements of the heat exchange equipment,the asphalt-based carbon fiber with high thermal conductivity and corrosion resistance was selected as the adhesion layer to prepare a new type of carbon fiber reinforced carbon steel laminate.A HotDisk TPS2500 thermal constant analyzer was used to test its thermal conductivity,and an accelerated life test with temperature as stress was designed under the condition of maintaining the amount of acid and concentration of the experiment.Experimental data on corrosion and thermal conductivity of new materials were obtained.The effects of experimental temperature,experimental duration,and material size on the performance of carbon fiber-reinforced carbon steel laminates were analyzed.The results show that increasing the experimental temperature will accelerate the corrosion process of the laminate and increase the carbon fiber composite layer.It has a delaying effect on corrosion,but at the same time leads to a decrease in thermal conductivity.Secondly,based on the experimental data of the corrosion changes and thermal conductivity of carbon fiber reinforced carbon steel laminates,the service life and thermal conductivity prediction models based on the Arrhenius equation and the heat transfer formula were established,respectively.The prediction results of the two models are compared with the measured values.The results show that the two models better reflect the performance change trend of carbon fiber reinforced carbon steel laminates,of which 1mm/0.5mm carbon fiber/carbon steel laminates are soaked at 70?,The life of 50%concentration dilute sulfuric acid solution is about 7.72 years.The overall deviation between the thermal conductivity model prediction and the actual measurement result is within 13%.The model prediction is reliable and the accuracy is high.Finally,using C#as the software development platform and MATLAB as the core design tool,a carbon fiber reinforced carbon steel laminate performance prediction software was developed.This software has the functions of predicting the service life,thermal conductivity and comprehensive performance indicators of carbon fiber laminate materials.It provides a certain theoretical reference for the material selection of flue gas heat exchange equipment.