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Parameter Study of a Brayton Cycle Waste Heat Recovery System for Turbocharged Diesel Engines

[+] Author Affiliations
Binyang Song, Weilin Zhuge, Xinqian Zheng, Yangjun Zhang

Tsinghua University, Beijing, China

Yong Yin, Yanting Zhao

Dongfeng Motor Company Limited, Wuhan, China

Paper No. FEDSM2013-16293, pp. V01CT18A006; 9 pages
doi:10.1115/FEDSM2013-16293
From:
  • ASME 2013 Fluids Engineering Division Summer Meeting
  • Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transport Phenomena in Mixing; Turbulent Flows: Issues and Perspectives
  • Incline Village, Nevada, USA, July 7–11, 2013
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5556-0
  • Copyright © 2013 by ASME

abstract

A Brayton cycle waste heat recovery (WHR) system for turbocharged diesel engines was described and the performance of a diesel engine integrated with this system was investigated. The waste heat recovery system is integrated with the turbocharging system of the diesel engine, with the turbocharger compressor working as the Brayton cycle compressor simultaneously.

The combined cycle of diesel cycle and Brayton cycle was simulated using the engine cycle simulation code GT-Suite 7.0, and the performance of the Brayton cycle WHR engine was investigated. The turbocharging turbine and the Brayton cycle turbine were designed and their performances were simulated with turbine through-flow model. The mass-flow rates of the diesel cycle and the Brayton cycle have a great influence on their power outputs, which are determined by the turbocharger performance greatly. The influence of the charging turbine geometric parameters on the performance of the Brayton cycle WHR system was discussed. Results show that there is a tradeoff in performance between high and low engine-speed operating conditions with the investigated parameters variation, and different geometric dimensions should be selected when different common operating conditions are considered.

Copyright © 2013 by ASME

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