一段文献翻译One of the main drawbacks of the design of HENs with t

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一段文献翻译
One of the main drawbacks of the design of HENs with the pinch method is that usually complex network configurations are obtained, and this can cause controllability problems. Additionally, the pinch design methods aims to achieve a network that operates with the minimum energy requirements and in which all the heat exchangers operate at least with the minimum temperature difference, and sometimes it is possible to obtain a lower total cost (operational + capital) if these constraints are relaxed. Another frequent situation is the retrofitting analysis of existing HENs. In this situation, the objective is to modify the network so as to achieve the maximum improvements in the energy efficiency of the network compatible with limited modifications of the existing HEN.

用箍缩法来设计HENS（专业词汇,根据具体情况翻译）的一个主要的缺点是经常要涉及到复杂的网络配置,这可能会产生一些可以控制的问题.此外,箍缩法设计旨在建立一个工作耗能最少、热交换器工作有最小的温差的网络,如果放宽这些要求的话这个方法是可以得到更低的成本（运作费+投入资本）.另一个常用的情况是对现有的HENS进行更新.在这种情况下,我们的目标是更改网络,从而实现在对现有的HENS进行有限修改的情况下,最大限度的提升网络兼容性的能源效率

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