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Heat transfer model for microwave hot in-place recycling of asphalt pavements 被引量:3
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作者 孙铜生 史金飞 朱松青 《Journal of Southeast University(English Edition)》 EI CAS 2008年第1期59-63,共5页
In order to solve for temperature fields in microwave heating for recycling asphalt mixtures, a two-dimensional heat transfer model for the asphalt mixtures within the heating range is built based on the theory of uns... In order to solve for temperature fields in microwave heating for recycling asphalt mixtures, a two-dimensional heat transfer model for the asphalt mixtures within the heating range is built based on the theory of unsteady heat conduction. Four onedimensional heat transfer models are established for the asphalt mixtures outside the heating range, which are simplified into four half-infinite solids. The intensity of the radiation electric field is calculated through experiment by using heating water loads. It is suggested that the mathematical model of boundary conditions can be established in two ways, which are theoretical deduction and experimental reverse. The actual temperature field is achieved by fitting temperatures of different positions collected in the heating experiment. The simulant temperature field, which is solved with the Matlab PDE toolbox, is in good agreement with the actual temperature field. The results indicate that the proposed models have high precision and can be directly used to calculate the temperature distribution of asphalt pavements. 展开更多
关键词 asphalt pavements microwave hot in-place recycling heat transfer model boundary condition intensity of radiation electric field microwave heating experiment
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Numerical simulation analysis on multi-layer low-temperature heating method of asphalt pavement in hot in-place recycling 被引量:4
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作者 MA Deng-cheng LAN Fen 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第12期3793-3806,共14页
Asphalt mixture pavement reheating is one of the important steps in hot in-place recycling(HIR).To improve the heating speed of asphalt pavement in HIR,based on the numerical analysis model of asphalt mixture heating ... Asphalt mixture pavement reheating is one of the important steps in hot in-place recycling(HIR).To improve the heating speed of asphalt pavement in HIR,based on the numerical analysis model of asphalt mixture heating process,a new multi-layer low-temperature heating method(MLHM)was proposed.Considering input heat flux,the thermal capacity and thermal resistance of asphalt mixture,the heat transfer model was established based on energy conservation law.By heating the asphalt mixture in layers,it changes the situation that the heat energy can only be input from the upper surface of the asphalt mixture pavement.Through the simulation of the heating method of asphalt mixture in the existing technology,the result shows that the existing heating methods lead to serious aging or charring of the asphalt mixture.By MLHM,the upper and the bottom of the asphalt mixture are heated at the same time,and the heating temperature is lower than other heat methods,which not only reduces the heating thickness and increases the heating area of the asphalt mixture pavement,but also improves the heating speed,saves the energy resource and ensures the heating quality.Especially,by MLHM,the heating uniformity is better and speed is faster. 展开更多
关键词 asphalt pavement hot in-place recycling heating speed heating uniformity MULTI-LAYER LOW-TEMPERATURE
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SY4500型就地热再生机组在沥青路面重铺中的应用 被引量:6
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作者 任淑晶 齐广田 《筑路机械与施工机械化》 北大核心 2010年第3期59-61,共3页
针对传统路面重铺施工方式带来的作业周期长、运输量大、资源流失和环境污染问题,对应用SY4500型就地热再生机组在沥青路面大型施工的工作原理、设备组成、工艺流程以及应注意的事项等进行详细介绍,并通过工程实例证明:科学合理使用重... 针对传统路面重铺施工方式带来的作业周期长、运输量大、资源流失和环境污染问题,对应用SY4500型就地热再生机组在沥青路面大型施工的工作原理、设备组成、工艺流程以及应注意的事项等进行详细介绍,并通过工程实例证明:科学合理使用重铺机组能确保施工质量,延长重铺路面寿命。 展开更多
关键词 就地热再生机组 沥青路面 重铺 工艺流程
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1.35MPa全低变流程热水循环量的探讨
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作者 高从新 《化肥设计》 CAS 1997年第2期32-35,共4页
对全低变余热回收、热水循环量、余热回收流程和设备的设置与改进,以及生产实际效果作了叙述。
关键词 热水循环量 低温变换 合成氨生产
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