Waste heat organic Rankine cycle of vehicle diesel engine under variable working conditions

doi:10.11949/j.issn.0438-1157.20141119

CIESC Journal ›› 2015, Vol. 66 ›› Issue (3): 1097-1103.DOI: 10.11949/j.issn.0438-1157.20141119

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Waste heat organic Rankine cycle of vehicle diesel engine under variable working conditions

YANG Kai¹, ZHANG Hongguang¹, SONG Songsong^1,2, YAO Baofeng¹

1 School of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;
2 Department of Automotive Engineering, Chengde Petroleum College, Chengde 067000, Hebei, China

Received:2014-07-24 Revised:2014-12-01 Online:2015-03-05 Published:2015-03-05
Supported by:
supported by the Natural Science Foundation of Beijing (3152005), the National Natural Science Foundation of China (51376011),the Scientific Research Key Program of Beijing Municipal Commission of Education (KZ201410005003) and the Research Fund for the Doctoral Program of Higher Education of China (3C005015201301).

变工况下车用柴油机排气余热有机朗肯循环回收系

杨凯¹, 张红光¹, 宋松松^1,2, 姚宝峰¹

1 北京工业大学环境与能源工程学院, 北京 100124;
2 承德石油高等专科学校汽车工程系, 河北承德 067000

通讯作者: 张红光
基金资助:
北京市自然科学基金项目(3152005);国家自然科学基金项目(51376011);北京市教育委员会科技计划重点项目(KZ201410005003);教育部高等学校博士学科点专项科研基金项目(3C005015201301)。

Abstract

Abstract:

An organic Rankine cycle system with recuperator was designed for recycling waste heat of a vehicle diesel engine and R245fa was used as working medium. The change of waste heat from vehicle diesel engine under variable working conditions was studied. The operating performance of the organic Rankine cycle system with recuperator was analyzed under variable working conditions and the influence of degree of superheat on the organic Rankine cycle system with recuperator was discussed. Three evaluation indices, waste heat recovery efficiency (WHRE), engine thermal efficiency increasing ratio (ETEIR) and output energy density of working fluid (OEDWF) were presented for the vehicle diesel engine-organic Rankine cycle combined system. The net power output, WHRE and ETEIR could reach maximum values of 43.74 kW, 14.93% and 13.58%.

Key words: waste heat recovery, organic Rankine cycle, variable working conditions, thermodynamics process, evaporation, heat transfer

摘要：

为回收车用柴油机的排气余热设计了一套带回热器有机朗肯循环系统,采用纯工质R245fa作为工作介质。通过实验研究了车用柴油机变工况下排气余热的变化规律,分析了不同工况下带回热器有机朗肯循环系统的运行性能,讨论了过热度对带回热器有机朗肯循环系统运行性能的影响。针对车用柴油机-有机朗肯循环联合系统提出了余热回收效率、发动机热效率提升率、单位工质输出能量密度3个评价指标。研究表明,带回热器有机朗肯循环系统的净输出功率、余热回收效率、发动机热效率提升率最大分别可以达到43.74 kW、14.93%、13.58%。

关键词: 余热回收, 有机朗肯循环, 变工况, 热力学过程, 蒸发, 传热

CLC Number:

TK406

YANG Kai, ZHANG Hongguang, SONG Songsong, YAO Baofeng. Waste heat organic Rankine cycle of vehicle diesel engine under variable working conditions[J]. CIESC Journal, 2015, 66(3): 1097-1103.

杨凯, 张红光, 宋松松, 姚宝峰. 变工况下车用柴油机排气余热有机朗肯循环回收系[J]. 化工学报, 2015, 66(3): 1097-1103.

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Waste heat organic Rankine cycle of vehicle diesel engine under variable working conditions

变工况下车用柴油机排气余热有机朗肯循环回收系

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