Simulation of CO2 Brayton cycle for engine exhaust heat recovery under various operating loads

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• 作者：Gequn Shu ; Chengyu Zhang ; Hua Tian …
• 关键词：CO2 ; Brayton cycle ; waste heat recovery
• 刊名：Transactions of Tianjin University
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：21
• 期：3
• 页码：193-198
• 全文大小：552 KB
• 参考文献：[1]Hussain Q, Brigham D, Maranville C. Thermoelectric exhaust heat recovery for hybrid vehicles [C]. SAE Paper. USA, 2009: 2009-01-327.
  [2]Wei D, Lu X, Lu Z et al. Performance analysis and optimization of organic Rankine cycle(ORC) for waste heat recovery[ J]. Energy Conversion and Management, 2007, 48(4): 1113-119.MathSciNet View Article
  [3]Tian H, Shu G, Wei H et al. Fluids and parameters optimization for the organic Rankine cycles(ORCs)used in exhaust heat recovery of Internal Combustion Engine(ICE)[J]. Energy, 2012, 47(1): 125-36.View Article
  [4]Vaja I, Gambarotta A. Internal Combustion Engine (ICE)bottoming with Organic Rankine Cycles (ORCs) [J]. Energy, 2010, 35(2): 1084-093.View Article
  [5]Wang E, Zhang H, Fan B et al. Optimized performances comparison of organic Rankine cycles for low grade waste heat recovery[J]. Journal of Mechanical Science and Technology, 2012, 26(8): 2301-312.MathSciNet View Article
  [6]Hountalas D T, Katsanos C O, Lamaris V T. Recovering energy from the diesel engine exhaust using mechanical and electrical turbocompounding [C]. SAE Paper. USA, 2007: 2007-01-563.
  [7]Song B, Zhuge W, Zhao R et al. An investigation on the performance of a Brayton cycle waste heat recovery system for turbocharged diesel engines[J]. Journal of Mechanical Science and Technology, 2013, 27(6): 1721-729.View Article
  [8]Fu J, Liu J, Shu G et al. Modeling of the regenerated Brayton air cycle for IC engine exhaust energy recovery[J]. Transactions of CSICE, 2013, 31(3): 248-54 (in Chinese).
  [9]Liu J, Fu J, Ren C et al. Comparison and analysis of engine exhaust gas energy recovery potential through various bottom cycles[J]. Applied Thermal Engineering, 2013, 50(1): 1219-234.View Article
  [10]Kim M H, Pettersen J, Bullard C W. Fundamental process and system design issues in CO2 vapor compression systems[ J]. Progress in Energy and Combustion Science, 2004, 30(2): 119-74.View Article
  [11]Kim Y M, Kim C G, Favrat D. Transcritical or supercritical CO2 cycles using both low- and high-temperature heat sources[J]. Energy, 2012, 43(1): 402-15.View Article
  
• 作者单位：Gequn Shu (1)
  Chengyu Zhang (1)
  Hua Tian (1)
  Yuanyuan Gao (1)
  Tuanbing Li (1)
  Ronggeng Qiu (1)
  
  1. State Key Laboratory of Engines, Tianjin University, Tianjin, 300072, China
  
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  
• 出版者：Tianjin University
• ISSN：1995-8196

文摘

A bottoming cycle system based on CO₂ Brayton cycle is proposed to recover the engine exhaust heat. Its performance is compared with the conventional air Brayton cycle under five typical engine conditions. The results show that CO₂ Brayton cycle proves to be superior to the air Brayton cycle in terms of the system net output power, thermal efficiency and recovery efficiency. In most cases, the recovery efficiency of CO₂ Brayton cycle can be higher than 9% and the system has a better performance at the engine’s high operating load. The thermal efficiency can be as large as 24.83% under 100% operating load, accordingly, the net output power of 14.86 kW is obtained.