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TEG design for waste heat recovery at an aviation jet engine nozzle

Ziolkowski, Pawel and Zabrocki, K. and Müller, Eckhard (2018) TEG design for waste heat recovery at an aviation jet engine nozzle. Applied Sciences. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/app8122637 ISSN 2076-3417

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Abstract

Finite element model (FEM)-based simulations are conducted for the application of a thermoelectric generator (TEG) between the hot core stream and the cool bypass flow at the nozzle of an aviation turbofan engine. This work reports the resulting requirements on the TEG design with respect to applied thermoelectric (TE) element lengths and filling factors (F) of the TE modules in order to achieve a positive effect on the specific fuel consumption. Assuming a virtual optimized TE material and varying the convective heat transfer coefficients (HTC) between the nozzle surfaces and the gas flows, this work reports the achievable power output. System-level requirement on the gravimetric power density (>100 Wkg−1) can only be met for F ≤ 21%. When extrapolating TEG coverage to the full nozzle surface, the power output reaches 1.65 kW per engine. The assessment of further potential for power generation is demonstrated by a parametric study on F, convective HTC, and materials performance. This study confirms a feasible design range for TEG installation on the aircraft nozzle with a positive impact on the fuel consumption. This application translates into a reduction of operational costs, allowing for an economically efficient TEG-installation with respect to the cost-specific power output of modern thermoelectric materials.

Item URL in elib:https://elib.dlr.de/122851/
Document Type:Article
Title:TEG design for waste heat recovery at an aviation jet engine nozzle
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ziolkowski, PawelGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Zabrocki, K.German Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Müller, EckhardGerman Aerospace Center, Institute of Materials Research, Köln, Germany and Justus Liebig University Giessen, Institute of Inorganic and Analytical Chemistry, 35392 Giessen, GermanyUNSPECIFIED
Date:2 November 2018
Journal or Publication Title:Applied Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.3390/app8122637
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2076-3417
Status:Published
Keywords:Thermoelectric generator; energy conversion; energy harvesting; aviation; jet engine; specific fuel consumption; module design; filling factor; FEM; simulation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Yasseri, Mohammad
Deposited On:15 Nov 2019 12:53
Last Modified:14 Dec 2019 04:24

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