中文摘要：

已有乙烯装置能效评估没有考虑装置之间原料、工艺技术和装置规模的差异,忽略了装置相关因素对能效指标的影响,无法系统地分析影响因素中隐藏的节能机会。本文针对乙烯装置不同工艺、规模以及能耗数据（燃料、电、蒸汽和水）分布特点,结合能效指数系统分析乙烯装置界区下影响乙烯流程能效的关键因素,给出乙烯装置能效分析方法。在能效分析的基础上,提出基于关联层次模型的乙烯装置能效虚拟对标方法,将能效指标和影响因素放在同一平台上分析,优于目前企业常用的均值法和指标最优法。运用该方法建立某乙烯装置乃至整个乙烯行业的能效虚拟对标,说明该方法更具有效性,更有助于找到节能降耗的方向与量化目标。

英文摘要：

The existed evaluation of energy efficiency of ethylene equipments does not consider the different raw materials,process technology and equipment sizes,and ignores the relative factors of energy efficiency index,so it cannot analyse the saving energy choice among energy consumption factors.The paper puts forward the energy efficiency analysis method for ethylene equipments according to technologies,scales and data distribution of energy consumption including fuel,power,steam and water inner ethylene process boundary.Furthermore,energy efficiency virtual benchmarking method is proposed based on dependent function analytic hierarchy process model（DFAHP）,with which it can manipulate multi-factors and energy efficiency index together.It outweighs the traditional evaluation method such as the mean method and optimal index method.The applications of an ethylene equipment,even the whole ethylene industry for energy efficiency analysis are tested.The validity of proposed method is verified,which is more helpful to find the saving energy chance and quantified energy targets.