Performance Analysis of a Thermoelectric Generator Through Component in the Loop Simulation
As a low maintenance solid state device, the thermo-electric generator (TEG) provides an opportunity to recover energy from the exhaust gas directly. In this paper, dynamic behaviour of a TEG applied to the EGR path of a non-road diesel engine has been an
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Abstract As a low maintenance solid state device, the thermo-electric generator (TEG) provides an opportunity to recover energy from the exhaust gas directly. In this paper, dynamic behaviour of a TEG applied to the EGR path of a non-road diesel engine has been analysed. Through the component in the loop (CIL) method, the proposed TEG was simulated by a virtual model in real time. A Nonlinear Auto-regressive exogenous (NLARX) model was operated in an xPC as the virtual model. Based on calculated results of the model, the position of EGR valve and the coolant valve were adjusted to simulate the effect of TEG installation on the gas flow in EGR path. Analysis of the TEG performance under Non-road Transient Cycle (NRTC) was conducted base on above method. With above analysis, following conclusions can be drawn. First, the component in the loop simulation method demonstrates a better performance to predict the TEG dynamic behaviour comparing to the software based methods. Using component in the loop methodology, transient performance of the TEG device can be predicted with a satisfied error range. Besides of the TEG performance prediction, the effect of the installation of the TEG was also analysed. The temperature variation and the pressure drop which affected by TEG system were predicted, and a more accurate TEG performance prediction can be achieved accordingly.
Keywords Thermoelectric generator Energy recovery Exhaust gas recirculation Component in the loop Non-road transient cycle
F2012-A07-006 G. Dong (&) R. Stobart A. Wijewardane J. Li Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, LE11 3TU, UK e-mail: [email protected]
SAE-China and FISITA (eds.), Proceedings of the FISITA 2012 World Automotive Congress, Lecture Notes in Electrical Engineering 190, DOI: 10.1007/978-3-642-33750-5_28, Ó Springer-Verlag Berlin Heidelberg 2013
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1 Introduction The pursuit of improved fuel economy is becoming an increasingly important objective for automotive manufacturers. Concerning Internal Combustion Engines (ICE), approximately 30–40 % of the energy supplied by the fuel is rejected to the environment through exhaust gas [1]. Thus, there is a possibility for further significant improvement of ICE efficiency with the utilization of exhaust gas energy and its conversion to mechanical energy or electrical energy. In this context, TEGs have been identified as a reliable solid state technology for power generation. TEGs have many advantages in comparison to other thermal energy recovery methods i.e., no moving parts, produce no noise and vibration, low maintenance, environmentally friendly and low quality thermal energy directly convert into high quality electrical energy. Because of these properties, TEGs have been used in military applications and in deep space exploration missions (as RTGs -Radioisotope Thermo-electric Generators) by NASA [2]. For automotive industries, since diesel engines are the most efficient power train solution,
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