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題名 | A Novel Strategy for Synthesis of Flexible Heat-Exchange Networks=一個考量操作彈性之熱交換器網路合成策略 |
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作者 | 陳誠亮; 郭志豪; 洪平松; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 36:5 民94.09 |
頁次 | 頁421-432 |
分類號 | 460.027 |
關鍵詞 | 熱交換器; 網路合成策略; Heat exchange network; HEN; Synthesis; Flexibility; Superstructure; Mixedinteger nonlinear programming; MINLP; |
語文 | 英文(English) |
中文摘要 | 本論文提出一個新的熱交換器網路合成策略,所設計的熱交換器網路可以容許程序中各股熱流及冷流的進口溫度及流量在一定範圍之內變動而仍然能維持正常操作。所提出的合成策略可以分成四個步驟進行。 (1)透過網路超結構,以最小化總年成本為目標,合成一個熱交換器網路; (2)暫不考慮各熱交換器之面積限制,針對步驟(1)所得之熱交換器網路做彈性指標分析,測試此結構是否能符合要求的特定操作範圍; (3)若(2)分析結果不符合需求,則在限制集合中加入整體切除方程式來限制此結構的使用,並回至步驟(1),重新進行步驟(1)-(3)直到求得符合要求的熱交換器網路為止,進入步驟(4); (4)考慮熱交換器之面積限制,將步驟(2)所得之熱交換器網路做彈性指標分析,測試此結構是否能符合要求的特定操作範圍,若可則停止,否則需增加熱交換器面積直至符合為止。 在本論文中將透過例子,說明此論文提供之設計策略的效率與可行性。 |
英文摘要 | A novel strategy for the synthesis of a cost-effective flexible heat-exchange network (HEN) that involves the expected disturbance range in the source-stream temperatures and flow rates is presented. The network synthesis problem is decomposed into four main iterative steps: (1) the synthesis of a network candidate with a minimum total annual cost (TAC); (2) flexibility analysis without consideration of the area restrictions to verify whether the current network candidate is feasible within the full, expected disturbance range; (30 integer cuts to exclude disqualified network configurations, followed by step (1) again to synthesis a new network structure; (4) with consideration of the size restriction that has been ignored previously, execution of flexibility analysis of the network qualified in step (2), with an increase of the area of individual exchange units if necessary. A few iterations of these design steps may be required to secure the desirable results. In addition to the theoretical derivation, a numerical example is provided to demonstrate the efficiency of the proposed strategy for the synthesis of a flexible heat exchange network. |
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