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System Simulations to Evaluate the Potential Efficiency of Humid Air Motors

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Author

Summary, in English

In the quest for efficiency improvement in heavy duty truck engines, waste heat recovery could play a valuable role. The evaporative cycle is a waste heat recovery technology aimed at improving efficiency and decreasing emissions. A humid air motor (HAM) uses the waste heat from the exhaust of the engine to humidify the inlet air; this humid air, with higher specific heat, reduces NOx emission to a greater extent [1] [2]. Despite this benefit of emission reduction, the increase or decrease in efficiency of the humid air motor compared to the conventional engine is not discussed in the literature [3] [4] [5]. In this paper, an attempt is made to study the efficiency of the HAM using system model simulations of a 13-liter heavy duty Volvo engine with a humidifier. The commercial software GT-SUITE is used to build the system model and to perform the simulations. The efficiency improvement of the HAM comes from the expansion of the vapor mass flow produced as a result of humidification. An effort is also made to understand the relationship between the humidified engine and its efficiency.

Department/s

Publishing year

2013

Language

English

Publication/Series

SAE Technical Paper Series

Document type

Conference paper

Publisher

Society of Automotive Engineers

Topic

  • Other Mechanical Engineering

Keywords

  • Internal Combustion Engines
  • Diesel Engines
  • Humid Air Motor

Conference name

SAE/KSAE , International Powertrains, Fuels & Lubricants Meeting, 2013

Conference date

2013-10-21 - 2013-10-23

Conference place

Soeul, Korea, Republic of

Status

Published

ISBN/ISSN/Other

  • ISSN: 0148-7191
  • 2013-01-2646