Efficiency improvement of a PEMFC system by applying a turbocharger |
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| Affiliation: | 1. Division of World Class University (WCU) Multiscale Mechanical Design, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Republic of Korea;2. Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Republic of Korea;3. Fuel Cell Vehicle Team 1, Eco-Technology Center, Hyundai-Kia Motors, Gyeonggi 446-912, Republic of Korea;1. University of Pitesti, 1 Targu din Vale, Arges, 110040 Pitesti, Romania;2. University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania;1. Technische Universität Berlin, Institute for Energy Engineering, Marchstr. 18, D-10587 Berlin, Germany;2. Daimler AG, Fuel Cell System Development, Group Research & Advanced Engineering, Neue Straße 95, D-73230 Kirchheim/Teck-Nabern, Germany;1. Division of World Class University (WCU) Multiscale Mechanical Design, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Republic of Korea;2. Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Republic of Korea |
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| Abstract: | A novel proton exchange membrane fuel cell (PEMFC) system that employs a turbocharger to reuse waste energy is proposed. This study is focused on optimal placement of the PEMFC turbocharger, using either the hydrogen feed stream or the stack outlet as the motive force. A one-dimensional isothermal two-phase model for a PEMFC and an isenthalpic model for the turbocharger are developed for system analysis. To find a better energy source, the system efficiency, power generation, and interaction with the balance of plant (BOP) are considered. To evaluate the feasibility of both systems, an exergy analysis is also performed. The results show that the system efficiency is higher when the turbocharger is installed after the hydrogen tank and that the amount of power generation is also larger when the turbocharger is located in the stack outlet. For the exergy analysis, the case for the turbocharger installed after the hydrogen tank shows higher performance. Therefore, it is preferable to install the turbocharger after the hydrogen tank. |
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| Keywords: | PEM fuel cells System modeling Balance of plant Turbocharger Exergy analysis |
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