Combined heat and power (CHP) scheme and total site integration (TSI) are good options to improve thermal efficiency for industrial plants. Apart from the reduction of energy cost, they help to promote environment sustainability, that is, reduced CO₂ emission. In this work, an optimisation framework for CHP, that is, automated targeting model (ATM), was extended for total site integration (TSI). TSI allows the recovery of energy from multiple processes in an industrial site through a central utility system. In the extended ATM, binary variables were added to allow the determination of energy content at each steam level from the TSI scheme. This enables the automated selection of CHP equipment, for example, boiler and turbine, so to make optimal use of excess energy in a TSI scheme. This is the main novelty in this revised ATM. A dimethyl ether (DME) plant case study is used for illustration. Several scenarios were analysed for the CHP scheme in the DME plant, utilising the TSI concept, such as maximum cogeneration potential, minimum total annualised cost, and maximum total net savings.

中文翻译：

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用于整个站点集成的扩展自动定位模型

热电联产 (CHP) 方案和全站点集成 (TSI) 是提高工厂热效率的不错选择。除了降低能源成本外，它们还有助于促进环境可持续性，即减少 CO ₂排放。在这项工作中，一个 CHP 的优化框架，即自动定位模型(ATM)，扩展为全站点集成 (TSI)。TSI 允许通过中央公用事业系统从工业现场的多个过程中回收能量。在扩展的 ATM 中，添加了二进制变量以允许根据 TSI 方案确定每个蒸汽级别的能量含量。这样可以自动选择 CHP 设备，例如锅炉和涡轮机，从而在 TSI 方案中优化利用多余的能源。这是此修订版 ATM 的主要新颖之处。使用二甲醚 (DME) 工厂案例研究进行说明。利用 TSI 概念，分析了 DME 工厂的 CHP 计划的几种情景，例如最大的热电联产潜力、最小的年化总成本和最大的总净节省。