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System Simulations to Evaluate the Potential Efficiency of Humid Air Motors

Narayanan, Prakash LU ; Tunér, Martin LU ; Tunestål, Per LU and Johansson, Bengt LU (2013) SAE/KSAE , International Powertrains, Fuels & Lubricants Meeting, 2013
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Internal Combustion Engines, Diesel Engines, Humid Air Motor
host publication
SAE Technical Paper Series
publisher
Society of Automotive Engineers
conference name
SAE/KSAE , International Powertrains, Fuels & Lubricants Meeting, 2013
conference location
Soeul, Korea, Republic of
conference dates
2013-10-21 - 2013-10-23
external identifiers
  • other:2013-01-2646
  • scopus:84890321317
ISSN
0148-7191
DOI
10.4271/2013-01-2646
language
English
LU publication?
yes
id
6e0ab5c4-f23c-4406-b646-9872444a8482 (old id 4318388)
alternative location
http://papers.sae.org/2013-01-2646/
date added to LUP
2016-04-01 14:29:46
date last changed
2020-01-12 16:14:24
@inproceedings{6e0ab5c4-f23c-4406-b646-9872444a8482,
  abstract     = {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.},
  author       = {Narayanan, Prakash and Tunér, Martin and Tunestål, Per and Johansson, Bengt},
  booktitle    = {SAE Technical Paper Series},
  issn         = {0148-7191},
  language     = {eng},
  publisher    = {Society of Automotive Engineers},
  title        = {System Simulations to Evaluate the Potential Efficiency of Humid Air Motors},
  url          = {http://dx.doi.org/10.4271/2013-01-2646},
  doi          = {10.4271/2013-01-2646},
  year         = {2013},
}