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Heat integration of ammonia-water absorption refrigeration system through heat-exchanger network analysis

机译：基于换热网络分析的氨水吸收式制冷系统的热集成

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The heat integration of existing single-effect ammonia-water absorption system is studied. A set of possible heat modifications involving with absorption heat or rectification heat recovery are identified on energy transfer diagram, the performance of each heat modification is studied and compared, and the interaction of heat transfer in generator, absorber, rectifier and solution heat exchanger is investigated through different combinations of heat modifications. There are two approaches of increasing thermal performance, one is aimed to increase the feed temperature of the distillation column by isolating heat exchanger components. The purpose of the other approach is to reduce heat consumption through heat integration by using bridge analysis. The two approaches can both boost the thermal performance effectively. The results demonstrate 22% increases in Coefficient of Performance (COP) compared with traditional single-effect cycle under certain working conditions. In general, obtaining the maximum heat saving capacity in advance under different working conditions is necessary either for retrofit or in preliminary design stage. In this paper, the selection guidance of suitable cycle under different working conditions is provided. (C) 2017 Elsevier Ltd. All rights reserved.
机译：研究了现有单效氨水吸收系统的热集成。在能量传递图上确定了一组涉及吸收热或精馏热回收的可能的热修正，研究并比较了每种热修正的性能，研究了发生器，吸收器，精馏器和溶液热交换器中的热交换相互作用。通过热修改的不同组合。有两种提高热性能的方法，一种旨在通过隔离热交换器组件来提高蒸馏塔的进料温度。另一种方法的目的是通过使用桥分析通过热集成来减少热量消耗。两种方法都可以有效地提高热性能。结果表明，在某些工作条件下，性能系数（COP）与传统的单效循环相比提高了22％。通常，无论是翻新还是在初步设计阶段，都必须提前在不同的工作条件下获得最大的节能能力。本文提供了在不同工况下合适的循环选择指南。 （C）2017 Elsevier Ltd.保留所有权利。

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