Review of organic Rankine cycles for internal combustion engine exhaust waste heat recovery
Review of organic Rankine cycles for internal combustion engine exhaust waste heat recovery
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DOI：
10.1016/j.applthermaleng.2012.10.017
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发表时间：
2013-03
影响因子：
6.4
通讯作者：
Charles Sprouse;C. Depcik
中科院分区：
文献类型：
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作者：
Charles Sprouse;C. Depcik
不断上涨的燃料价格和未来的二氧化碳排放限制正在重新引起人们对提高发动机热效率的方法的兴趣，超越缸内技术的限制。一个有前途的机制，实现这两个目标是发动机废热转换为更有用的形式的能源，无论是机械或电力。本文回顾了内燃机排气余热回收的历史，重点介绍了有机朗肯循环，因为这种热力循环可以很好地利用中等品位的排气能量。循环膨胀机和工作流体的选择是审查的主要焦点，因为它们被认为对系统性能有最大的影响。结果表明，使用现代制冷剂和膨胀机技术的进步，潜在的燃油经济性提高约10%。
Escalating fuel prices and future carbon dioxide emission limits are creating a renewed interest in methods to increase the thermal efficiency of engines beyond the limit of in-cylinder techniques. One promising mechanism that accomplishes both objectives is the conversion of engine waste heat to a more useful form of energy, either mechanical or electrical. This paper reviews the history of internal combustion engine exhaust waste heat recovery focusing on Organic Rankine Cycles since this thermodynamic cycle works well with the medium-grade energy of the exhaust. Selection of the cycle expander and working fluid are the primary focus of the review, since they are regarded as having the largest impact on system performance. Results demonstrate a potential fuel economy improvement around 10% with modern refrigerants and advancements in expander technology.