Session: 17-03 Session 3

Paper Number: 82087

82087 - Design of Annular Thermoelectric Generators System to Recover Waste Heat From Aircraft Jet Engine 

Thermoelectrical (TE) materials have been investigated in various applications due to their capability to convert waste heat into electrical power. The possibility of implementing thermoelectric generators (TEGs) on the nozzle of aircraft engine to recover waste heat energy will be introduced in this study. The annular TE configuration can be mounted on the nozzle utilizing the temperature difference between hot gas flow and cool air bypass flow. 3D finite element method is going to be used to perform the thermoelectric output power and conversion efficiency. Geometrical parameters of annular TEGs structure such as leg length, angle of TE leg, and angle of gap distance between TE legs will also be optimized to quantify the total number of TE modules on the outer surface area of the nozzle. Due to high thermomechanical properties, TE materials such as silicon germanium or half-Heusler which perform better at higher temperature range with higher values of figure of merit (zt) will be selected as TE materials. However, due to high temperature gradient, the cascade annular thermoelectric systems will be also included in this study by inserting another TE material at lower stage such as lead telluride or skutterudite which is suitable at intermediate temperature range. The comparison between annular single stage and two stages TE systems is demonstrating in the analysis. The design of annular TEGs configuration on the nozzle of aircraft engine can be used as non-gas cogeneration application system leading into a good impact on the fuel consumption and therefore decreases the operational cost.

Presenting Author: Mutabe Aljaghtham Prince Sattam Bin Abdulaziz University

Presenting Author Biography: Mutabe Aljaghtham graduated last year with Ph.D. degree from the University of Miami and joined the department of Mechanical Engineering at Prince Sattam bin Abdulaziz recently. He is working as assistant professor and his interest research fields focused on energy and thermal fluid sciences.

Authors:

Mutabe Aljaghtham Prince Sattam Bin Abdulaziz University