The process synthesis problem referred to as work and heat exchange networks (WHENs) is an extension of the classical heat exchanger networks problem considering only temperature and heat. In WHENs, additional properties are pressure and work, and strong interactions exist between temperature, pressure, work, and heat. The actual sequence of heating, cooling, compression, and expansion for pressure changing streams (PCs) will affect the shape of the composite and grand composite curves, the Pinch point, and the thermal utility demands. Even stream identities (hot or cold) will sometimes change. The identification of the optimal thermodynamic path from supply to target state for PCs becomes a primary and fundamental task in WHENs. An MINLP model has been developed based on an extension of the Duran–Grossmann model (that can handle variable temperatures) to also consider changing stream identities. Three reformulations of the extended Duran–Grossmann model have been developed and tested for two examples. © 2018 American Institute of Chemical Engineers AIChE J, 65: 549–561, 2019

中文翻译：

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确定工作和热交换网络综合中的最佳热力学路径

称为工作和热交换网络（WHEN）的过程综合问题是仅考虑温度和热量的经典热交换器网络问题的扩展。在WHEN中，附加属性是压力和功，并且温度，压力，功和热之间存在强相互作用。变压流（PC）的加热，冷却，压缩和膨胀的实际顺序将影响复合曲线和大复合曲线的形状，夹点和热效用需求。甚至流标识（热或冷）有时也会更改。在WHEN中，确定PC从供应状态到目标状态的最佳热力学路径已成为首要任务和基本任务。基于Duran–Grossmann模型的扩展（可以处理可变温度），开发了MINLP模型，该模型还考虑了变化的流身份。已经开发了扩展的Duran-Grossmann模型的三种公式，并针对两个示例进行了测试。©2018美国化学工程师学会AIChE J，65：549–561，2019