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Synergistic optimization framework for the process synthesis and design of biorefineries

《化学科学与工程前沿（英文）》 2022年第16卷第2期页码 251-273 doi: 10.1007/s11705-021-2071-9

摘要： The conceptual process design of novel bioprocesses in biorefinery setups is an important task, which remains yet challenging due to several limitations. We propose a novel framework incorporating superstructure optimization and simulation-based optimization synergistically. In this context, several approaches for superstructure optimization based on different surrogate models can be deployed. By means of a case study, the framework is introduced and validated, and the different superstructure optimization approaches are benchmarked. The results indicate that even though surrogate-based optimization approaches alleviate the underlying computational issues, there remains a potential issue regarding their validation. The development of appropriate surrogate models, comprising the selection of surrogate type, sampling type, and size for training and cross-validation sets, are essential factors. Regarding this aspect, satisfactory validation metrics do not ensure a successful outcome from its embedded use in an optimization problem. Furthermore, the framework’s synergistic effects by sequentially performing superstructure optimization to determine candidate process topologies and simulation-based optimization to consolidate the process design under uncertainty offer an alternative and promising approach. These findings invite for a critical assessment of surrogate-based optimization approaches and point out the necessity of benchmarking to ensure consistency and quality of optimized solutions.

关键词： biotechnology surrogate modelling superstructure optimization simulation-based optimization process design

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苏通大桥主桥上部结构施工及控制技术研究

张鸿,罗承斌, 张永涛,游新鹏

《中国工程科学》 2009年第11卷第3期页码 85-91

摘要：

苏通大桥是目前世界上已建成的最大跨径斜拉桥，其主桥上部结构施工，主要包括边跨辅助跨以及索塔区大块梁段安装，标准梁段安装以及中跨合龙几个阶段。其中大块梁段采用浮吊整体吊装，标准梁段采用桥面双吊机系统进行吊装，中跨合龙采取顶推辅助合龙方法。同时在施工过程中采用了全过程自适应几何控制方法，通过全过程精确控制结构构件的无应力尺寸与形状，以及实现控制系统和被控制系统相适应来达到控制桥梁结构最终线形和内力的目标。为了解决长悬臂主梁风致振动条件下的测量问题，采用了包括基于GPS和基于全站仪的两种动态几何监测系统。对上部

关键词：苏通大桥上部结构施工方法施工控制几何控制抗风措施

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南京长江第四大桥上部结构施工关键技术

何超然,潘桂林,李有为

《中国工程科学》 2013年第15卷第8期页码 42-47

摘要：

南京长江第四大桥主桥为主跨1 418 m的双塔三跨连续式钢箱梁悬索桥，为国内同类型桥梁之最，居世界第三。本文从索鞍吊装、牵引系统与猫道架设、主缆索股架设、主缆紧缆、索夹及吊索安装、钢箱梁架设和主缆缠丝等方面对南京长江第四大桥悬索桥上部结构安装施工关键技术进行了系统介绍，可为类似大跨度悬索桥上部结构施工提供参考。

关键词：南京长江第四大桥双塔三跨悬索桥上部结构施工主缆架设钢箱梁架设

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Energy systems engineering: methodologies and applications

Pei LIU, Efstratios N. PISTIKOPOULOS, Zheng LI

《能源前沿（英文）》 2010年第4卷第2期页码 131-142 doi: 10.1007/s11708-010-0035-8

摘要： Energy systems are the major contributor to ever-increasing primary energy consumption and consequent greenhouse gas emissions. To tackle these critical problems, planning and design of energy systems needs to be improved towards a more efficient, cost-effective, and environmentally benign direction. However, although there are many technical choices available, they are often developed separately by their own technical communities and driven by their specific interest, thus methods and experience obtained in planning and design of a certain type of energy systems are usually not applicable to other types of energy systems. Energy systems engineering provides a generic methodological framework to facilitate the planning and design of energy systems and to produce integrated solutions to real-life complex energy problems via a systematic approach.In this paper, we present an overview of key methodologies of energy systems engineering, covering superstructure based modelling, mixed-integer programming, multi-objective optimization, optimization under uncertainty, and life-cycle assessment. Applications of these methodologies in polygeneration energy systems design, hydrogen infrastructure planning, and design of energy systems in commercial buildings are provided to demonstrate the capability of these methodologies.

关键词： energy systems engineering superstructure mixed-integer programming multi-objective optimization optimization under uncertainty life-cycle assessment

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MILP synthesis of separation processes for waste oil-in-water emulsions treatment

Zorka N. Pintarič,Gorazd P. Škof,Zdravko Kravanja

《化学科学与工程前沿（英文）》 2016年第10卷第1期页码 120-130 doi: 10.1007/s11705-016-1559-1

摘要： This paper presents a novel synthesis method for designing integrated processes for oil-in-water (O/W) emulsions treatment. General superstructure involving alternative separation technologies is developed and modelled as a mixed integer linear programming (MILP) model for maximum annual profit. Separation processes in the superstructure are divided into three main sections of which the pretreatment and final treatment are limited to the selection of one alternative (or bypass) only, while within the intermediate section various combinations of different technologies in series can be selected. Integrated processes composed of selected separation techniques for given ranges of input chemical oxygen demand (COD) can be proposed by applying parametric analyses within the superstructure approach. This approach has been applied to an existing industrial case study for deriving optimal combinations of technologies for treating diverse oil-in-water emulsions within the range of input COD values between 1000 mg?L and 145000 mg?L . The optimal solution represents a flexible and profitable process for reducing the COD values below maximal allowable limits for discharging effluent into surface water.

关键词： oil-in-water emulsion chemical oxygen demand superstructure process synthesis MILP