naa a22 4500 510801374 CHVBK 20180411083357.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11664-012-2360-7 doi (NATIONALLICENCE)springer-10.1007/s11664-012-2360-7 Analysis of Annular Thermoelectric Couples with Nonuniform Temperature Distribution by Means of 3-D Multiphysics Simulation [Elektronische Daten] [Andreas Bauknecht, Torsten Steinert, Carsten Spengler, Gerrit Suck] Thermoelectric (TE) modules with annular geometry are very attractive for waste heat recovery within the automotive world, especially when integrated as stacks into tubular heat exchangers. The required temperature difference is built up between the coolant, which flows inside an inner tube, and the exhaust gas, which flows around an outer tube. The flow pattern of the exhaust gas can be axial or circumferential, which can lead to higher heat transfer coefficients on the outer surface of the tube. However, this multidimensional construction in combination with a complex flow pattern can lead to a nonuniform heat flux. Additionally, the system experiences a nonuniform temperature distribution which consequently leads to complex conditions regarding the electrical potential. The relevant effects are investigated using a three-dimensional (3-D) numerical model implemented in the computational fluid dynamics (CFD) simulation environment Star-CCM+. The model supports temperature-dependent characteristics of the materials, contact resistances, and parasitic effects in the TE module. Furthermore, it involves techniques to quickly find the exact maximum power point of the TE module with the given boundary conditions. Using the validated model the influence of the nonuniform temperature distribution is investigated with emphasis on the electrical output and TE efficiency. TMS, 2012 Thermoelectric nationallicence nonuniform temperature distribution nationallicence system modeling nationallicence 3-D simulation nationallicence CFD nationallicence Star-CCM+ nationallicence Bauknecht Andreas BMW Group, Munich, Germany aut Steinert Torsten BMW Group, Munich, Germany aut Spengler Carsten BMW Group, Munich, Germany aut Suck Gerrit BMW Group, Munich, Germany aut Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/7(2013-07-01), 1641-1646 0361-5235 42:7<1641 2013 42 11664 https://doi.org/10.1007/s11664-012-2360-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11664-012-2360-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bauknecht Andreas BMW Group, Munich, Germany aut NATIONALLICENCE 700 1- Steinert Torsten BMW Group, Munich, Germany aut NATIONALLICENCE 700 1- Spengler Carsten BMW Group, Munich, Germany aut NATIONALLICENCE 700 1- Suck Gerrit BMW Group, Munich, Germany aut NATIONALLICENCE 773 0- Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/7(2013-07-01), 1641-1646 0361-5235 42:7<1641 2013 42 11664 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer