Print Email Facebook Twitter Thermal Modelling of a Concept for a Hybrid Micro Combustion Generator Title Thermal Modelling of a Concept for a Hybrid Micro Combustion Generator Author Böhme, Florian (TU Delft Mechanical, Maritime and Materials Engineering) Contributor Goosen, J.F.L. (mentor) van Ostayen, R.A.J. (graduation committee) Peeters, J.W.R. (graduation committee) Degree granting institution Delft University of Technology Programme Mechanical Engineering | Mechatronic System Design (MSD) Date 2022-12-13 Abstract Mobile electronics or remote devices like sensors for the Internet of Things (IoT) require energy storage with increasing energy densities, approaching the limits of the widespread lithium batteries. At the same time, lithium batteries are subject to growing criticism about their environmental impact due to their raw materials and their mining methods. Chemical energy seems to be a promising alternative and the development of micro combustion to make use of it is already for almost 30 years the topic of ongoing research. Recent studies show that compliant combustion engines are a good solution to mitigate some problems like leakage and friction and thus, achieve higher efficiencies. However, the most prevalent problem is heat losses through the walls because of the high surface-to-volume ratio in small-scale combustion. In this work, a design concept was proposed that not only insulates the compliant combustion chamber of the actuator for Flapping Wing Micro Air Vehicles (FWMAV) but also uses the waste heat to generate electricity. That was done by attaching Thermoelectric (TE) modules to a support structure and thermally connecting them with porous media to the oscillating combustor wall. The actuator uses the heat and pressure generated by the catalytic reaction of hydrogen peroxide and therewith, only emits steam and oxygen. With the help of a one-dimensional steady-state heat resistance model and a one-dimensional transient heat resistance-capacitance model, an optimum design was found. With that, it is possible to create a temperature difference sufficient enough to enable energy harvesting by TE modules. That was achieved by implementing an exhaust gas recirculation whichtransfers heat to the modules and simultaneously serves as a heating blanket for the combustor. A downside of the design is the relatively long time it takes to reach its steady state and especially for FWMAV, the increase in weight. Subject Hybrid Micro GeneratorMicro Internal Combustion EngineMicro Thermoelectric Generator To reference this document use: http://resolver.tudelft.nl/uuid:e3e9a825-d8ed-40ad-b49e-c30cc02520ba Part of collection Student theses Document type master thesis Rights © 2022 Florian Böhme Files PDF Master_Thesis_Florian_Boehme.pdf 5.61 MB Close viewer /islandora/object/uuid:e3e9a825-d8ed-40ad-b49e-c30cc02520ba/datastream/OBJ/view