Resumen

BRACAMONTE-BARAN, Johane Hans  y  BARITTO-LORETO, Miguel Leonardo. Irreversibility Analysis of Non Isothermal Flat Plate Solar Collectors for Air Heating with a Dimensionless Model. Ing. invest. y tecnol. [online]. 2013, vol.14, n.2, pp.237-247. ISSN 2594-0732.

The dimensionless model developed and validated by Baritto and Bracamonte (2012) for the thermal behavior of flat plate solar collector without glass cover is improved by adding the entropy balance equation in a dimensionless form. The model is solved for a wide range of aspect ratios and mass flow numbers. A parametric study is developed and the distribution of internal irreversibilities along the collector is analyzed. The influence of the design parameters on the entropy generation by fluid friction and heat transfer is analyzed and it is found that for certain combinations of these parameters optimal thermodynamic operation can be achieved.

Palabras llave : second law analysis; flat plate solar collector; solar air heater; irreversibility; dimensionless model.