Modelagem e análise experimental de um protótipo didático de motor stirling
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Data
2016-12-05
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Universidade Federal de Goiás
Resumo
This work is the development of a prototype for Stirling engine which was designed with the
aim of understanding the machine mainly about the component parts, construction difficulties
and type of relevant parameters for its performance. Starting from geometric and
thermodynamic data from the prototype, with application of the Schmidt modeling, a digital
program was developed to calculate values such as power output and efficiency. The
prototype was also used to carryd out bench tests using a data acquisition system
implemented in electronics platform Arduino Uno. Using Hall-effect and temperature sensors,
following the steps of the algorithm proposed by Conner, it was possible to raise data as
temperature and revolutions per minute (rpm) for the flywheel coupled to the prototype shaft,
these variables made possible to estimate the power output and operational conditions such
as the gas temperature in compression and expansion spaces, etc. The comparison between
results from simulations and the bench tests demonstrated the great influence of prototype
construction data (volumes, source temperature, etc.) on the output power and the
performance of the equipment and also how far is the constructed device from the ideal model
proposed by Schmidt. The experiments have shown that the prototype can reach a rotation
speed up to 1.200 rpm at 159 degrees Celsius of external engine heat source, with output
power of 100 milliwatt. The prototype resulting from this research, although small, has
allowed the access to important information that can open paths to the construction of larger
Stirling engines and consequently with output powers closer to practical use.
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Citação
DIAS, Laura Vitória Rezende. Modelagem e análise experimental de um protótipo didático de motor stirling. 2016. 119 f. Dissertação (Mestrado em Engenharia Elétrica e da Computação) - Universidade Federal de Goiás, Goiânia, 2016.