Resumo

TORRES-TAMAYO, Enrique; RETIRADO-MEDIANEJA, Yoalbys  e  GONGORA-LEYVA, Ever. Experimental heat transfer coefficients for the liquor cooling in plate heat exchanger. Ingeniería Mecánica [online]. 2014, vol.17, n.1, pp. 68-77. ISSN 1815-5944.

The loss of efficiency of the ammonia liquor cooling process, by means of the plate heat exchanger, is associated to the incorrect estimate of the heat transfer coefficients and the accumulation of inlays in the exchange surface. The objective of the investigation is to determine the transfer coefficients and the influence of the inlays in the efficiency loss of the installation. By means of an iterative procedure was obtained the Nusselt number equation and the relationship with the Reynolds and Prandtl number, for it was used it a design experimental multifactorial. The results predict the knowledge of the coefficients for the calculation of the Nusselt number for both fluids. The ammonia liquor coefficients values are inferior, due to the presence of gassy components. The obtained equation shows correspondence with the Buonapane pattern, the comparative error is 3,55 %.

Palavras-chave : plate heat exchanger; heat transfer coefficients; thermal efficiency.

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