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http://dx.doi.org/10.5762/KAIS.2014.15.8.4723

Change in Engine Exhaust Characteristics Due to Automotive Waste Heat Recovery  

Kim, Kibum (Department of Mechanical Engineering, Chungbuk National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.8, 2014 , pp. 4723-4728 More about this Journal
Abstract
In this study, a thermoelectric module (TEM) and a diesel engine were modeled using 1-D commercial software AMESim, and the performance of the TEM was evaluated when the engine was operated under the NEDC driving cycle. The goal of TEM modeling was to investigate not only the waste heat recovery (WHR) rate and energy converting efficiency, but also the heat transfer rate by taking the materials characteristics into account. In addition, a diesel oxidation catalyst (DOC) was designed, and it was found that the waste heat recovery with TEM affects the activation of DOC and alters engine exhaust composition. The simulation indicated that the WHR using TEM is beneficial for decreasing the fuel consumption of vehicles, but the reduction in the exhaust temperature affects the activation of DOC, resulting in an approximately 14% increase in CO and HC emissions. Therefore, the effect of waste heat recovery on the automotive emission characteristics must be considered in the development of automotive engine WHR systems.
Keywords
Waste heat recovery (WHR); Thermoelectric module (TEM); Diesel oxidation catalyst (DOC);
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Times Cited By KSCI : 1  (Citation Analysis)
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