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Heat and work integration: Fundamental insights and applications to carbon dioxide capture processes

机译：热和工作的整合：二氧化碳捕集过程的基本见解和应用

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摘要

The integration of heat has achieved a notable success in the past decades. Pinch Analysis is a well established methodology for heat integration. Work is an equally important thermodynamic parameter. The enthalpy of a process stream can be changed by the transfer of heat and/or work. Heat and work are actually interchangeable and can thus be integrated. For example, compression processes consume more work at higher temperatures, however, the compression heat may be upgraded and utilized; expansion processes produce more work at higher temperatures, however, more heat may be required. The classical heat integration problem is thus extended to a new research topic about the integration of both heat and work. The aim of this paper is to present the problem definition, fundamental thermodynamic insights and industrial applications of heat and work integration. The results from studies on the three carbon dioxide capture processes show that significant energy savings can be achieved by proper heat and work integration. In the oxy-combustion process, the work consumption for cryogenic air separation is reduced by 10.1%. In the post-combustion membrane separation process, the specific work consumption for carbon dioxide separation is reduced by 12.9%. In the membrane air separation process, the net work consumption (excluding heat consumption) is reduced by 90%. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在过去的几十年中，热量的整合取得了显著成就。夹点分析是一种公认​​的热集成方法。功是同等重要的热力学参数。工艺流的焓可以通过热和/或功的传递而改变。热和功实际上是可以互换的，因此可以集成在一起。例如，压缩过程在较高温度下会消耗更多的功，但是压缩热量可能会提高并得到利用。膨胀过程在更高的温度下产生更多的功，但是可能需要更多的热量。因此，经典的热集成问题扩展到了关于热与功的集成的新研究课题。本文的目的是介绍问题定义，基本热力学见解以及热和功集成的工业应用。对三种二氧化碳捕集过程的研究结果表明，通过适当的供热和工作集成，可以节省大量能源。在氧气燃烧过程中，低温空气分离的工作量减少了10.1％。在燃烧后膜分离过程中，二氧化碳分离的比功降低了12.9％。在膜空气分离过程中，净功消耗（不包括热量消耗）减少了90％。 （C）2016 Elsevier Ltd.保留所有权利。

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