工業園區蒸汽系統之設計與改良

Design and Retrofit of Steam Systems in Industrial Parks

林志曜(Chih-Yao Lin)

指導教授 ： 陳誠亮

國立臺灣大學/工學院/化學工程學研究所/博士(2013年)

https://doi.org/10.6342/NTU.2013.02462

摘要

本論文著重於能源系統之設計，對於改善工業界能源利用情況有顯著助益。首先，發展一包含所有潛在可能設計之蒸汽分配超結構，並應用系統化數學規劃技巧設計蒸汽系統之蒸汽分配網路。此外，亦引入設備性能模型，處理因為能源需求變動所引起之多時期操作問題。將透過混合整數非線性規劃模型的建立，決定蒸汽系統最適的網路結構及最佳的操作條件，以期有效提升公用流體工廠之能源使用效率。另一方面，為了提升全廠之效能，將透過全廠整合技巧的應用來設計全域之能源系統。此法可透過彈性蒸汽系統模型及熱整合技巧的應用，發展一包含可內外部能源整合之熱回收模型。如此，來自製程工廠之能源將可於製程工廠彼此間共享，用以滿足其能源需求，也可利用該能源至蒸汽系統工廠使用。此整合模型，可透過彈性蒸汽系統模型及運輸模型的應用，來設計一整合製程工廠能源之蒸汽分配網路。更進一步，為了能同時合成全廠之網路結構，亦發展一階層式超結構，用於熱交換器網路之設計。隨後，透過所發展之整合模型，用以規劃最佳全廠能源系統之能源分配。另外，為了能使工業永續發展，工業園區能源整合亦為一重要議題。將探討蒸汽系統和鄰近能源工廠整合之可能性。透過蒸汽及電力能源的整合與共享，有效提升能源的利用。此問題將透過發展一新穎蒸汽系統模型，對於現存運作之蒸汽工廠，評估最佳之能源整合方式及決定最適當之改良策略。

關鍵字

蒸汽分配網路 ； 熱交換器網路 ； 超結構 ； 混合整數非線性規劃 ； 熱整合 ； 能源整合

並列摘要

This thesis deals with the design of energy systems, which benefits the improvement of energy utilization in industry. First, a systematic mathematical technique is applied for the design of steam distribution networks (SDNs) for steam systems. Herein, a superstructure is developed to include all potential configurations for the synthesis work. In addition, a generic performance model is also considered in order to address the multi-period operating, which results from the varying energy demands. The design problem is formulated as a mixed-integer nonlinear programming (MINLP) model accordingly to decide the best the network structure and determine the optimal system operating conditions. An effective model is proposed to enhance the energy use efficiency for the utility plants.
In order to prompt whole plant performance, total site integration means is applied for the design of entire energy systems. In addition to the development of flexible steam system, heat integration technique is utilized to design heat recovery systems for process plants, where energy transfer both inner and outer plants is allowable. In this way, energy from process sites can be transferred not only to different process plants but also to steam systems as new energy sources. The integrated model is first accomplished by the integration of flexible steam and generalized transshipment models, which can determine the best SDNs with energy input from process sites. While for the simultaneous synthesis of entire networks, the design of heat exchanger networks (HENs) are achieved by the development the generalized stage-wise superstructure for heat recovery systems. With total site integration models, energy allocation among entire systems can be determined and optimized.
Energy integration in industrial parks is another important issue for the sustainable development in industry. In the last part, steam systems able to be integrated with vicinal companies' energy plant are discussed in order to enhance the whole energy utilization. Two major elements of the energy share, steam and electricity, are used for the integration. The novel steam system model including the energy share possibility is developed, which can perform the analysis and assessment of the existing plants to evaluate feasibility of energy import or export and decide the retrofit design appropriate.

並列關鍵字

Steam distribution network(SDN) ； Heat exchanger network(HEN) ； Superstructure ； Mixed-integer nonlinear programming(MINLP) ； Heat integration ； Energy integration

參考文獻

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