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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL DATA COMPARISSON AND PREDICTION OF A PLAIN FIN-AND-TUBE HEAT EXCHANGER
Submission Author:
Rubens Coutinho Toledo , SP
Co-Authors:
Rubens Coutinho Toledo, Alex Roger Almeida Colmanetti, Cristiano Tibiriçá
Presenter: Rubens Coutinho Toledo
doi://10.26678/ABCM.ENCIT2020.CIT20-0803
Abstract
This work investigated a plain fin-and-tube heat exchanger in a closed-loop wind tunnel. Hot water was forced into the tubes and it was refrigerated by forced air flowing over the fins. Water flow rate was fixed at 3.5 l/min, air velocity ranged from 1.4 to 2 m/s, and outer surface area was 1.0264 m. Experimental results were reduced with ε − NUT approach and Colburn factor was calculated. Literature correlations were confronted with measured data in order to verify performance and applicability. An additional data-base with 57 distinct heat exchangers from literature was added to our data and a new correlation for Colburn factor was developed. The mean absolute error were calculated for each correlation and the new one presented the lowest error, 12.4%
Keywords
plain fin-and-tube, Heat exchanger, Colburn factor
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