轨旁储能装置(wayside energy storage device,WESD)具有大容量、大功率、转换高效等优势,为未来轨道交通节能运行提供了新的解决方案。针对发生延误后多列车调度和节能运行优化问题,提出了一种综合考虑节能运行和旅客需求的调度优化方...轨旁储能装置(wayside energy storage device,WESD)具有大容量、大功率、转换高效等优势,为未来轨道交通节能运行提供了新的解决方案。针对发生延误后多列车调度和节能运行优化问题,提出了一种综合考虑节能运行和旅客需求的调度优化方法。将轨旁储能与列车运行状态切换控制、时刻表调整相结合,在考虑坡度的情况下对同一供电区段内多个列车的到发时间、运行速度和牵引、惰行、制动等运行状态进行协同调控优化,以提高再生制动能量的直接利用率,有效降低对WESD的容量要求。仿真结果表明,所提方法可以降低WESD的累计储能容量,实现列车节能运行。展开更多
Recycling rare earth elements(REEs)from waste is necessary for an environmentally sustainable reuse and wastewater management approach.Na-A zeolite was synthesized from coal fly ash(CFA)and applied for Ce^(3+)adsorpti...Recycling rare earth elements(REEs)from waste is necessary for an environmentally sustainable reuse and wastewater management approach.Na-A zeolite was synthesized from coal fly ash(CFA)and applied for Ce^(3+)adsorption.Fourier transform infrared(FTIR)spectra show peaks at 790,500 and 467 cm^(-1),which are bond vibrations of Si-O-Si,Si with Al-O and Si-O-.The surface area is 15.88 m^(2)/g,with a pore size of 2.14 nm.SEM images show a cubic shape,which indicates the formation of zeolite.Field emission and energy disperse spectroscopy(EDS)shows the formation of Si,Al,Na,and O.Na-A zeolite was applied for Ce^(3+)adsorption.The optimum conditions for Ce^(3+)adsorption are 50 ppm concentration,360 min,and pH 6.The maximum adsorption capacity is 176.49 mg/g.Based on the results,it is found that the adsorption of Ce^(3+)by Na-A zeolite is pseudo-second-order.The desorption test using HNO_(3) is more effective than using HCl and H_(2)SO_(4).A desorption efficiency of 97.22%is obtained at 4 cycles.Adsorption test using real sample wastewater demonstrates an adsorption efficiency of 83.35%.展开更多
文摘轨旁储能装置(wayside energy storage device,WESD)具有大容量、大功率、转换高效等优势,为未来轨道交通节能运行提供了新的解决方案。针对发生延误后多列车调度和节能运行优化问题,提出了一种综合考虑节能运行和旅客需求的调度优化方法。将轨旁储能与列车运行状态切换控制、时刻表调整相结合,在考虑坡度的情况下对同一供电区段内多个列车的到发时间、运行速度和牵引、惰行、制动等运行状态进行协同调控优化,以提高再生制动能量的直接利用率,有效降低对WESD的容量要求。仿真结果表明,所提方法可以降低WESD的累计储能容量,实现列车节能运行。
基金Project supported by Rumah Program 2023 and Net Zero Emission Program(1507/Ⅱ.7/HK.01.00/6/2023)a research facility from the National Research and Innovation Agency of Republic of Indonesia。
文摘Recycling rare earth elements(REEs)from waste is necessary for an environmentally sustainable reuse and wastewater management approach.Na-A zeolite was synthesized from coal fly ash(CFA)and applied for Ce^(3+)adsorption.Fourier transform infrared(FTIR)spectra show peaks at 790,500 and 467 cm^(-1),which are bond vibrations of Si-O-Si,Si with Al-O and Si-O-.The surface area is 15.88 m^(2)/g,with a pore size of 2.14 nm.SEM images show a cubic shape,which indicates the formation of zeolite.Field emission and energy disperse spectroscopy(EDS)shows the formation of Si,Al,Na,and O.Na-A zeolite was applied for Ce^(3+)adsorption.The optimum conditions for Ce^(3+)adsorption are 50 ppm concentration,360 min,and pH 6.The maximum adsorption capacity is 176.49 mg/g.Based on the results,it is found that the adsorption of Ce^(3+)by Na-A zeolite is pseudo-second-order.The desorption test using HNO_(3) is more effective than using HCl and H_(2)SO_(4).A desorption efficiency of 97.22%is obtained at 4 cycles.Adsorption test using real sample wastewater demonstrates an adsorption efficiency of 83.35%.
