To simultaneously improve the quantity and quality of heat recovery in a heat exchanger network(HEN),this study conducts a theory analysis based on the first and second laws of thermodynamics.Under the premise of maxi...To simultaneously improve the quantity and quality of heat recovery in a heat exchanger network(HEN),this study conducts a theory analysis based on the first and second laws of thermodynamics.Under the premise of maximizing the heat recovery quantity of HEN,Ġdiss is used as an evaluation index to optimize the quality of heat recovery.Meanwhile,the total annual cost(TAC)is considered as another optimization objective to ensure the economic feasibility of the HEN.A superstructure-based multi-objective mixed integer non-linear programming approach is put forward to solve the trade-off between minimizingĠdiss and minimizing TAC.This allows for the optimum HEN structure to be obtained.A well-studied example is solved to highlight the benefits of the proposed method.展开更多
轻烃回收装置是炼化企业的常见装置之一,其换热物流较多,能量利用常存在优化空间。以某厂轻烃回收装置为研究对象,应用Aspen Energy Analyzer对换热网络进行分析,并结合实际流程进行优化。在碳二系统增加一台换热器E283,将吸收塔中沸器...轻烃回收装置是炼化企业的常见装置之一,其换热物流较多,能量利用常存在优化空间。以某厂轻烃回收装置为研究对象,应用Aspen Energy Analyzer对换热网络进行分析,并结合实际流程进行优化。在碳二系统增加一台换热器E283,将吸收塔中沸器出口吸收剂(热物流H04)与碳四解吸塔回流罐顶出口气体(冷物流C04)进行换热,节省公用工程620.0 kW,折合标油53.2 kg/h。在碳三系统中,将碳五分离塔塔底液进再沸器物流(冷物流C05)的加热介质由0.5 MPa蒸汽改为凝结水,可降低能耗(折合标油)133.1 kg/h,为生产带来经济效益。展开更多
基金The authors would like to gratefully acknowledge the financial support provided by the National Key R&D Program of China(2017YFE0116300,2019YFE0122100)the Youth Innovation Promotion Association,CAS(2017353)the DNL Cooperation Fund,CAS(DNL202023).
文摘To simultaneously improve the quantity and quality of heat recovery in a heat exchanger network(HEN),this study conducts a theory analysis based on the first and second laws of thermodynamics.Under the premise of maximizing the heat recovery quantity of HEN,Ġdiss is used as an evaluation index to optimize the quality of heat recovery.Meanwhile,the total annual cost(TAC)is considered as another optimization objective to ensure the economic feasibility of the HEN.A superstructure-based multi-objective mixed integer non-linear programming approach is put forward to solve the trade-off between minimizingĠdiss and minimizing TAC.This allows for the optimum HEN structure to be obtained.A well-studied example is solved to highlight the benefits of the proposed method.
