Cabezas-Gomez, LubenNavarro, Helio AparecidoSaiz-Jabardo, Jose Maria2014-02-262014-05-202014-02-262014-05-202007-03-01Journal of Heat Transfer-transactions of the Asme. New York: Asme-amer Soc Mechanical Eng, v. 129, n. 3, p. 282-290, 2007.0022-1481http://hdl.handle.net/11449/24782A thorough study of the thermal performance of multipass parallel cross-flow and counter-cross-flow heat exchangers has been carried out by applying a new numerical procedure. According to this procedure, the heat exchanger is discretized into small elements following the tube-side fluid circuits. Each element is itself a one-pass mixed-unmixed cross-flow heat exchanger. Simulated results have been validated through comparisons to results from analytical solutions for one- to four-pass, parallel cross-flow and counter-cross-flow arrangements. Very accurate results have been obtained over wide ranges of NTU (number of transfer units) and C* (heat capacity rate ratio) values. New effectiveness data for the aforementioned configurations and a higher number of tube passes is presented along with data for a complex flow configuration proposed elsewhere. The proposed procedure constitutes a useful research tool both for theoretical and experimental studies of cross-flow heat exchangers thermal performance.282-290engthermal effectivenessNTUcross-flowheat exchangersArtigo10.1115/1.2430719WOS:000245457400005Acesso restrito