Resumo

VELAZQUEZ-GONZALEZ, Alejandro; CORRALES-SUAREZ, Jorge Michel  e  PEREZ-MOLINA, Leonardo Rafael. Thermo-exergetic evaluation of a compact pirotubular steam generator. Ing. invest. y tecnol. [online]. 2020, vol.21, n.2, e1696.  Epub 13-Nov-2020. ISSN 2594-0732.  https://doi.org/10.22201/fi.25940732e.2020.21n2.015.

One of the most important variables to know how efficient a thermal machine is exergy. In practice it is one of the least controlled variables. In the investigation, an exergetic thermal study was carried out on a compact pirotubular steam generator. In order to achieve this, a balance of mass, energy and entropy was carried out. The energy balance was carried out by direct and indirect methods. The percentages of the exergies of each working substance in the process are specified. The energy yield for the direct method was 0.901 and for the indirect method was 0.882, as each method has its function in the energy analysis. The irreversibilities in the process were 26 %. The exergetic yield was 0.39, conditioned by a complete combustion in the fireplace. It was demonstrated that the steam generator for the real operating conditions is oversized.

Palavras-chave : Pyrotubular steam generator; energy; entropy; exergy; operational variables; irreversibilities; performance.

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