探讨了东北某输油站场的碳排放核算方法,并结合碳夹点分析法提出了能源结构的调整方案,着重研究了可再生能源对高碳排放能源的替代,从而减少碳排放。碳排放核算结果表明,输油站场温室气体的年排放量约为605705.87 t CO_(2)e,其中电力消耗产生的温室气体排放量在高碳排放能源中占比最高,超过94%。碳夹点分析结果表明:在高碳排放能源减排10%的限制下,采用最小可再生能源量方案时,能源结构为电力80.10%、热力4.01%、天然气3.95%、煤2.40%、可再生能源9.54%,可再生能源量为14716.36 tce;采用最大可再生能源量方案时,能源结构为电力85.66%、可再生能源14.35%,可再生能源量为22131.76 tce;在此基础上做进一步分析,可得到各部门的能源分配方案。
For investigating efficiently the stagnation kinetic-process of Z-pinch,we develop a novel modified electrostatic implicit particle-in-cell algorithm in radial one-dimension for Z-pinch simulation in which a small-angle cumulative binary collision algorithm is used.In our algorithm,the electric field in z-direction is solved by a parallel electrode-plate model,the azimuthal magnetic field is obtained by Ampere’s law,and the term for charged particle gyromotion is approximated by the cross product of the averaged velocity and magnetic field.In simulation results of 2 MA deuterium plasma shell Zpinch,the mass-center implosion trajectory agrees generally with that obtained by one-dimensional MHD simulation,and the plasma current also closely aligns with the external current.The phase space diagrams and radial-velocity probability distributions of ions and electrons are obtained.The main kinetic characteristic of electron motion is thermal equilibrium and oscillation,which should be oscillated around the ions,while that of ion motion is implosion inwards.In the region of stagnation radius,the radial-velocity probability distribution of ions transits from the non-equilibrium to equilibrium state with the current increasing,while of electrons is basically the equilibrium state.When the initial ion density and current peak are not high enough,the ions may not reach their thermal equilibrium state through collisions even in its stagnation phase.
