naa a22 4500 510802761 CHVBK 20180411083402.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11664-013-2535-x doi (NATIONALLICENCE)springer-10.1007/s11664-013-2535-x Stacked Micro Heat Exchange System for Optimized Thermal Coupling of MicroTEGs [Elektronische Daten] [N. Wojtas, M. Grab, W. Glatz, C. Hierold] This study presents modeling and experimental results of micro thermoelectric generators (μTEGs) integrated into a multilayer micro heat exchange system. The multilayer configuration benefits from low heat transfer resistances at small fluid flow rates and at the same time from low required pumping powers. The compact stacked power device allows for high net output power per volume, and therefore a reduction in size, weight, and cost compared with conventional large-scale heat exchangers. The influence of the boundary conditions and the system design parameters on the net output power of the micro heat exchange system was investigated by simulation. The theoretical results showed a major impact of the microchannel dimensions and the μTEG thickness on the overall output performance of the system. By adapting the applied fluid flow rate, the system's net power output can be maximized for varying operating temperatures. Experimental measurements of the cross-flow micro heat exchange system were in good agreement with the performed simulations. A net μTEG output power of 62.9mW/cm2 was measured for a double-layer system at an applied water inlet temperature difference of 60K with a Bi2Te3 μTEG (ZT of 0.12), resulting in a net volumetric efficiency factor of 37.2W/m3/K2. TMS, 2013 Micro thermoelectric generator nationallicence micro heat exchange system nationallicence thermal coupling nationallicence waste heat recovery nationallicence volumetric efficiency factor nationallicence Wojtas N. Micro and Nanosystems, ETH Zurich, Tannenstrasse 3, 8092, Zurich, Switzerland aut Grab M. Micro and Nanosystems, ETH Zurich, Tannenstrasse 3, 8092, Zurich, Switzerland aut Glatz W. greenTEG GmbH, Technoparkstrasse 1, 8005, Zurich, Switzerland aut Hierold C. Micro and Nanosystems, ETH Zurich, Tannenstrasse 3, 8092, Zurich, Switzerland aut Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/7(2013-07-01), 2103-2109 0361-5235 42:7<2103 2013 42 11664 https://doi.org/10.1007/s11664-013-2535-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11664-013-2535-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wojtas N. Micro and Nanosystems, ETH Zurich, Tannenstrasse 3, 8092, Zurich, Switzerland aut NATIONALLICENCE 700 1- Grab M. Micro and Nanosystems, ETH Zurich, Tannenstrasse 3, 8092, Zurich, Switzerland aut NATIONALLICENCE 700 1- Glatz W. greenTEG GmbH, Technoparkstrasse 1, 8005, Zurich, Switzerland aut NATIONALLICENCE 700 1- Hierold C. Micro and Nanosystems, ETH Zurich, Tannenstrasse 3, 8092, Zurich, Switzerland aut NATIONALLICENCE 773 0- Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/7(2013-07-01), 2103-2109 0361-5235 42:7<2103 2013 42 11664 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer