2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 7: Energy Production, Environmental & Multiscale
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 528 pages |
| ISBN: | 978-1-987820-09-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Energy conversion of porous media combustion into electric power
Valeri Bubnovich1;1UNIVERSIDAD DE SANTIAGO, Santiago, Chile;
Type of Paper: Regular
Id Paper: 177
Topic: 15
Abstract:
Matrix stabilized porous medium combustion is an advanced technique in which a solid porous matrix within the combustion chamber accumulates heat from the hot gaseous products and preheats incoming reactants. This heat recuperation allows the burning of ultra fuel-lean mixtures, which conserves energy resources, or the burning of gases of low calorific value, utilizing otherwise wasted resources.
The heat generated by the porous burner can be harvested with thermoelectric devices for a reliable method of generating electricity. Thermoelectric devices operate by utilizing the Seebeck effect: a temperature gradient across two joined conducting materials will create a voltage. To optimize the voltage output for any given application, a thermoelectric device with the highest possible efficiency will be chosen for the specific temperature application. Thus, the idea of using thermoelectric elements coupled with a porous burner can provide a reliable source of energy.
An experimental study on combustion in porous media and thermoelectric generation was performed in the present work. The reactor was composed of two types of porous media where flame stabilization was reached at the interface of them. Four external thermoelectric modules were placed to harvest the thermal energy produced in the system. Maximum values of voltage, current and power obtained were 5.93 V, 1.59 A and 9.42 W, respectively. Specifically, the following research and analysis were realized in this paper:
- Design and develop the porous burner prototype coupled with thermoelectric device which will be used to study porous media combustion as well as power generation utilizing lean fuel mixtures.
- Study the current density, voltage and power output dependencies to achieve the maximum power by efficiently using the thermoelectric elements.
- Study the effect of the fuel equivalence ratio and velocity filtration of CH4-Air mixture on the combustion and power generation during the reactions.