Resumo

PEREIRA, Roberto Guimarães; SILVA, Ivenio Moreira da  e  PARDAL, Juan M.. Energy and Exergy Analysis in a Centrifugal Pump Driven by a Diesel Engine Using Soybean Biodiesel and Mixtures with Diesel. Ing. Investig. [online]. 2022, vol.42, n.3, e213.  Epub 01-Nov-2022. ISSN 0120-5609.  https://doi.org/10.15446/ing.investig.88228.

In this study, soybean biodiesel and mixtures with diesel are used as fuel in a diesel engine that drives a centrifugal pump. The consumption useful work rate, the reversible work rate, and the efficiency of the second law of thermodynamics were calculated by means of energetic and exergetic analyses. The soybean biodiesel was produced using ethanol with a proportion of 33% v/v and the catalyst NaOH (1%), thus obtaining a yield of 90,63%. The fuels used were pure diesel (B0); 25% soybean biodiesel and 75% diesel (B25); 50% soybean biodiesel and 50% diesel (B50); 75% soybean biodiesel and 25% diesel (B75); and soybean biodiesel (B100). The density and kinematic viscosity were within the limits established by the National Petroleum, Natural Gas, and Biofuels Agency. A value of 39 017 kJ.kg-1 was obtained for the highest heating value of the soybean biodiesel (B100). A 32,05% maximum second-law efficiency was obtained in the case of soybean biodiesel at maximum pump speed and at 9,2 m2/h. The B50 fuel obtained a 29,78% maximum second-law efficiency when the centrifugal pump operated at 2 733 rpm and at a maximum flow rate.

Palavras-chave : soybean biodiesel; centrifugal pump; energy; exergy; sustainability.

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