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AUTHOR(S):

Enrique Torres Tamayo, Eduardo Javier Diaz Chicaiza, Maria Paulina Cedeno Gonzalez, Carlos Luis Vargas Ferruzola, Segundo Gustavo Peralta Landeta

 

TITLE

Heat Transfer Coefficients and Efficiency Loss in Plate Heat Exchangers During the Ammonia Liquor Cooling Process

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KEYWORDS

Plate heat exchanger, heat transfer coefficients, thermal efficiency

ABSTRACT

In the Ammonia Recovery process of the Cuban nickel company the efficiency loss of the Ammonia liquor cooling process, by means of the plate heat exchangers, is associated to the incorrect estimate of the heat transfer coefficients and the accumulation of inlays in the exchange surface. The above increases the consumption of water, the available energy in the system and the maintenance costs. The investigation was carried out in plate heat exchangers, with the objective of determining the heat transfer coefficients and the influence of the inlays in the efficiency loss of the installation. By means of an iterative procedure was determined the equation of the Nusselt number and their dependence with the Reynolds and Prandtl, for it was used a multifactor experimental design and measurements of the installation work parameters in function of the time. The results predict the knowledge of the coefficients for the calculation of the Nusselt number with the Reynolds and Prandtl values for both fluids (water and ammonia liquor). The values of the ammonia liquor coefficients are lower, due to the presence of gas components. The comparison with other investigators shows correspondence with Thonon results. The cleaning and maintenance of the installation is recommended to the 27 days period due to the loss thermal efficiency less than 70%.

Cite this paper

Enrique Torres Tamayo, Eduardo Javier Diaz Chicaiza, Maria Paulina Cedeno Gonzalez, Carlos Luis Vargas Ferruzola, Segundo Gustavo Peralta Landeta. (2016) Heat Transfer Coefficients and Efficiency Loss in Plate Heat Exchangers During the Ammonia Liquor Cooling Process. International Journal of Theoretical and Applied Mechanics, 1, 55-60