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\hypersetup{pdftitle={Performance Evaluation of a Stirling Engine Working with Combustion Gases of Coffee and Rice Husk},pdfauthor={Alexander García Mariaca, Juan Eduardo Rolón Ríos},pdfsubject={Tropentag 2016: Abstract},pdfkeywords={Coffee husk, combustion, emissions  , performance, rice husk, stirling engine},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 18-21, 2016, Vienna, Austria}}\\[1ex] \Large{``Solidarity in a competing world ---\\fair use of resources''\\[2ex]}}
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\Large{\textbf{Performance Evaluation of a Stirling Engine Working with Combustion Gases of Coffee and Rice Husk\footnote{\textbf{Contact Address:} Alexander García Mariaca, Foundation University Los Libertadores, Mechanical Engineering, Carrera 16 # 63 A - 68, 111221~Bogotá D.c., Colombia, \mbox{e-mail}: \email{agarciam04@libertadores.edu.co}}\\[0.8ex]}}
\normalsize{\textsc{Alexander García Mariaca$^{1}$, Juan Eduardo Rolón Ríos$^{2}$}}
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\begin{itemize*}
\item[]{\small{\textit{$^{1}$Foundation University Los Libertadores, Mechanical Engineering, Colombia}}}
\item[]{\small{\textit{$^{2}$Foundation University Los Libertadores, Mechanical Engineering, }}}
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\index[author]{García Mariaca, Alexander}
\index[author]{Rolón Ríos, Juan Eduardo}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
The Colombian agriculture is one of the most important sector in the country economy, however, the technical development in this sector is still limited due to the absence of public policies that allow to the agrarian development of the country, additionally, the most part of the Colombian rural sector is located in Non-Interconnected Zones (NIZ), that for 2014, they represented \mbox{53\,\%} of the national territory. Nonetheless, the NIZ with their high agriculture activity produce a great amount of residual biomass, biomass that can be used as an alternative source of energy and in this way, to provide themselves with electricity. This can promote agrarian development using less power plants that use fossil oils to work.



One technological application and easy to use is the Stirling engines. These engines can use the combustion gases from residual biomass as heat source. The present work shows the results obtained from experimental tests on a Stirling engine, with a compression ratio of 1.5, running to 1800 RPM. This engine uses as heat source the combustion gases from the burning of coffee and rice husk. The results show that break power with this engine was 475 W. For husk consumption, it was seen that for getting the same break power it was needed \mbox{15\,\%} more rice husk than coffee husk while the gas emissions for the rice husk were a little bit higher than coffee husk, this behaviour can be explained due to the necessity of using more mass of rice husk compared to the coffee husk. With these results, it is clear that residual biomass can be utilised in electric generation through the use of Stirling engines and thanks to this, to improve the quality of life of the people living in the NIZ. 



}

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\end{abstract}
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\noindent \textbf{Keywords:} Coffee husk, combustion, emissions  , performance, rice husk, stirling engine
\index[key]{Coffee husk}
\index[key]{Combustion}
\index[key]{Emissions  }
\index[key]{Performance}
\index[key]{Rice!husk}
\index[key]{Stirling engine}
\end{document}
