Thermoelectric generation is an alternative to recover some of the wasted energy trough an exhaust of the internal combustion engines. This paper assesses the performance of a thermoelectric generator with 20 modules by implementing a waffle heat exchanger. Experimental results showed a variable range of power recovery from 57.87 W to 71.13 W for B10, B5, and Diesel. The highest energy conversion efficiency of the aforementioned thermoelectric device was of 3% with the highest load and the fastest rotational speed. Also, the recovery process reduced gaseous emissions such as CO, CO2, NO, NOX, and HC. Additionally, the smoke opacity per kWh is reduced at significant levels of operations such as 2.42% when using diesel, 2.65% when using B5 and 3% when using B10. However, when using biodiesel blends, NOx emissions were increased. Overall the biodiesel resulted in a higher power recovery performance versus the diesel.
This study investigates the current situation of electricity generation from non-conventional renewable energy sources (NCRES) in Colombia. In general, it was shown that Colombia has potential in renewable sources such as solar, wind, and biomass. However, barriers such as lack of human capital, policies focused on conventional technologies and high investment costs have impeded their growth. Although the development of these sources has been encouraged through Law 1715 of 2014, more policies and developments are needed to promote this type of NCRES. The use of thermoelectric devices (TED) can become a potential NCRES alternative, while the political and technological conditions improve in Colombia. Around the world, TEDs have allowed the recovery of waste heat in a variety of industrial applications and the automotive sector. They are allowing in the latter, not only the generation of electric power, but also the reduction in engine emissions. Besides, its characteristics have allowed it to be used for the generation of electric power, both in developed and developing countries. In this document, an example presentation is developed that demonstrates the applications of the TED in the cases above to demonstrate the potential that the TED can have in almost any place that has a heat source.
Internal combustion engines only take advantage of a quantity of the energy available in the combustion process. In addition to this, the emissions generated alter the balance and natural composition of the air, which represents a current risk to human health. Because of this, to reduce the dependence on fossil fuels and minimize the harmful emissions to the environment of this type of thermal machines, in this work, the implementation of an exhaust gas energy recovery system is proposed. With the recovered energy, is hydroxy through the electrolysis process, and so that partial substitution of diesel fuel with the gaseous fuel produced. For the experimental study, a diesel engine SOKAN SK-MDF300 is coupled to a thermoelectric generator formed by Peltier modules, which transform thermal energy into electrical energy. This energy was used to generate hydroxy, reaching a generation maximum of 1.37 L / min. The influence of the partial substitution using diesel fuel and B10 fuel was studied. The experimental results allow us to conclude that a 3% reduction in fuel was achieved with diesel fuel. In addition to this, CO2 emissions were reduced in 13%, CO in 11.66%, NOx in 35.38%, SOx in 14.84% and 21.69% of reduction in smoke opacity, in the condition of maximum load during the test in the engine. The implementation of the TEG, coupled with the HHO gas generation system increases the overall efficiency of the engine by 4.2%.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.