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Technical and economic analyses of waste heat energy recovery from internal combustion engines by the Organic Rankine Cycle

机译：通过有机朗肯循环从内燃机回收余热能的技术和经济分析

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摘要

Due to its low complexity, the Organic Rankine Cycle can be considered as one of the best options for waste heat recovery at low (at most 230 degrees C) and average (230-650 degrees C) temperatures. A technical and economic study has been conducted in this work in order to increase the efficiency of electricity production, and thus reduce fuel consumption and polluting gas emission from Internal Combustion Engines. For such a purpose, two Organic Rankine Cycle sets were suggested. The first one is facing deployment in water shortage areas (Organic Rankine Cycle using a cooling tower for the condensing system) and another one with the water supply condenser being made by the urban water net. Both simulated systems were able to increase electricity production by almost 20% when toluene was the working fluid. The economic analysis was based on the Engineering Chemical Cost Plant Index model which showed that the financial return from the implementation of the Organic Rankine Cycle system can occur in six years. Thus, it is noted that the Organic Rankine Cycle system can be installed in areas where there is no water abundance and without much yield loss. Despite being an appropriate technological solution to recover the waste heat present in Internal Combustion Engines exhaust gas, it still lacks in governmental incentives for a wide application of the system. (C) 2016 Elsevier Ltd. All rights reserved.
机译：由于其较低的复杂性，有机朗肯循环可被视为在低温（至多230摄氏度）和平均温度（230至650摄氏度）下回收余热的最佳选择之一。为了提高发电效率，从而减少内燃机的燃油消耗和废气排放，进行了一项技术和经济研究。为此，建议使用两个有机朗肯循环集。第一个面临在缺水地区的部署（有机朗肯循环，使用冷却塔作为冷凝系统），第二个面临供水冷凝器由城市供水网制造。当使用甲苯作为工作流体时，这两个模拟系统都能将发电量提高近20％。经济分析基于工程化学成本工厂指数模型，该模型表明实施有机朗肯循环系统的财务回报可能在六年内发生。因此，应注意，有机朗肯循环系统可安装在水量不大且产量损失不大的区域。尽管作为回收内燃机废气中存在的废热的合适技术解决方案，它仍然缺乏政府对该系统的广泛应用的鼓励。 （C）2016 Elsevier Ltd.保留所有权利。

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